Performance detection device and preparation process of graphite loaded potassium tantalate composite material

Abstract

The application provides a graphite-loaded potassium tantalate composite material performance detection device and preparation process, relates to the optical detection technical field, and comprises a detection box, a mobile detection mechanism, a convenient compaction mechanism and a moving mechanism. The mobile detection mechanism comprises a moving platform and a sample seat, the sample seat is arranged on the inner side of the moving platform, two sliding blocks are fixedly arranged at the bottom of the moving platform, connecting plates are slidably connected to the surfaces of the two sliding blocks, and springs are arranged on the inner sides of the two connecting plates. The scheme finally realizes synchronous movement of the moving mechanism, the moving platform and the driving gear plate, can automatically and accurately move the sample groove in the sample seat to the lower side of the compaction block, and can automatically return the sample seat to the initial position after compaction through cooperation of the sliding blocks and the springs. The whole process does not need manual intervention, and the optical detection efficiency of the sample is effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical detection, and in particular to a performance detection device for graphite-loaded potassium tantalate composite material and a preparation process. BACKGROUND

[0002] A photocatalyst is a kind of semiconductor material or composite material that can catalyze chemical reactions in the surrounding environment under the irradiation of specific wavelength light without permanent change in its own chemical properties. The essence of its action is to use light energy to excite electron transition to produce substances with strong redox activity, thereby driving a series of reactions beneficial to the environment or energy. By optical detection of the photocatalyst, it can be verified whether it meets the design target and application requirements.

[0003] In related technologies, after the photocatalyst is manufactured, it needs to be detected by a performance detection device to determine whether it meets the design target and application requirements. However, the existing performance detection device is not convenient for rapid detection of the sample when in use. The diffuse reflectance of the sample is extremely related to the micro-geometric structure of its surface. Currently, detection requires manual compaction of the sample, resulting in low detection efficiency. Moreover, manual compaction is not convenient for controlling the pressing force. Even the same amount of sample will have inconsistent compaction and surface flatness under manual compaction, which will cause the measured value of reflected light intensity to fluctuate, affecting the accuracy of the detection data.

[0004] Therefore, it is necessary to provide a performance detection device for graphite-loaded potassium tantalate composite material and a preparation process to solve the above technical problems. SUMMARY

[0005] The present application provides a performance detection device for graphite-loaded potassium tantalate composite material and a preparation process, which solves the problem that the existing performance detection device is not convenient for rapid detection of the sample when in use.

[0006] To solve the above technical problems, the performance detection device for graphite-loaded potassium tantalate composite material provided by the present application comprises a detection box, a mobile detection mechanism, a convenient compaction mechanism and a mobile mechanism.

[0007] The mobile detection mechanism comprises a mobile platform and a sample seat, the sample seat is arranged on the inner side of the mobile platform, the bottom of the mobile platform is fixedly provided with two sliding blocks, the surfaces of the two sliding blocks are slidably connected with two connecting plates, the inner sides of the two connecting plates are both provided with springs, and the right side of the inner wall of the detection box is fixedly provided with two stop rods.

[0008] The convenient compacting mechanism comprises two slide rails, a sliding frame and driving gear plates, the two slide rails are fixed to the bottom of the inner wall of the detection box, the sliding frame is in sliding connection with the slide rails, the left side of the sliding frame is fixed with two groups of teeth, the inner side of the sliding frame is in vertical screw connection with an adjusting screw rod, the bottom end of the adjusting screw rod is in screw connection with a compacting block, the front side and the rear side of the inner wall of the detection box are both in rotary connection with driving gear plates and transmission gear plates through pivots, the two transmission gear plates are respectively in meshing connection with the two groups of teeth, the front side and the rear side of the inner wall of the detection box are both fixed with protection frames.

[0009] The moving mechanism is horizontally arranged in the interior of the detection box and is used for adjusting the detection position of the sample seat.

[0010] Preferably, the inner side of the top of the detection box is provided with an ultraviolet light emitting diode and a fiber probe, the ultraviolet light emitting diode and the fiber probe are vertically arranged on the top of the sample seat, the inner side of the sample seat is provided with two sample grooves, the left sample groove is used for placing a standard white board, and the right sample groove is used for placing a detection sample.

[0011] Preferably, the working height of the compacting block can be adjusted by rotating the adjusting screw rod, and the compacting block can be replaced according to the size of the sample groove.

[0012] Preferably, the moving mechanism comprises a bidirectional screw rod which is horizontally and rotatably connected to the inner wall of the detection box, the surface of the bidirectional screw rod is in screw connection with a connecting bracket, the connecting bracket is fixedly connected to the opposite side of the two connecting plates, the bottom of the inner wall of the detection box is fixed with two guide rails, the surfaces of the two guide rails are both in sliding connection with two sliding seats, the four sliding seats are divided into front and rear groups, the opposite sides of the two groups of sliding seats are respectively fixedly connected to the two connecting plates, and the sides away from each other of the two groups of sliding seats are respectively fixedly connected to the two driving gear plates, and the left side of the detection box is provided with a driving motor which is used for driving the bidirectional screw rod to rotate.

[0013] Preferably, the opposite sides of the two connecting plates are rotatably connected with a switching mechanism, the switching mechanism comprises rotating rods which are rotatably connected to the opposite sides of the two connecting plates, the surfaces of the two rotating rods are both fixedly provided with flip gears, the surfaces of the two rotating rods and located on the sides away from each other of the two flip gears are both in key groove connection with flip brackets, the top of the two flip brackets is fixedly connected to the bottom of the sample seat, the bottom of the inner wall of the detection box is fixed with a mounting seat, and the top of the mounting seat is provided with two groups of flip teeth.

[0014] Preferably, the back of the inner wall of the detection box is fixedly provided with a detection mechanism, the detection mechanism comprises a rotating frame fixedly provided on the back of the inner wall of the detection box, the inner side of the rotating frame is rotationally connected with a driving shaft and a driven shaft, the surfaces of the driving shaft and the driven shaft are fixedly provided with synchronous wheels, the surfaces of the two synchronous wheels are sleeved with a synchronous belt, the surface of the driving shaft is fixedly provided with an adjusting gear, the left side of the inner wall of the detection box is fixedly provided with a turnover frame, the inner side of the turnover frame is rotationally connected with an industrial camera through the driven shaft, and the surface of the driven shaft is provided with an ultraviolet light supplement lamp.

[0015] Preferably, the inner side of the top of the detection box is provided with a dropper, the dropper is used for adding pure water to the sample dropwise, and the hydrophilicity or hydrophobicity of the sample is evaluated, and the right side of the connecting support and the right side of the inner wall of the detection box are provided with a distance sensor.

[0016] Preferably, the front of the detection box is provided with a controller and a box door, the back of the box door is provided with a sealing gasket, and the inside of the detection box is in a dark environment through the sealing gasket.

[0017] A preparation process of a graphite-loaded potassium tantalate composite material, comprising the following steps:

[0018] Step S1, immerse natural graphite powder in concentrated H2SO4 / HNO3 mixed acid for stirring, wash with deionized water, and vacuum dry to obtain graphene oxide;

[0019] Step S2, place the prepared graphene oxide in a tube furnace, anneal, and obtain partially reduced graphene;

[0020] Step S3, dissolve TaCl5 in ethanol, and add deionized water dropwise to hydrolyze to generate Ta(OH)5 sol;

[0021] Step S4, add K2CO3 solution to adjust PH, and form a precursor sol;

[0022] Step S5, add a dispersing agent and ultrasonically stir;

[0023] Step S6, disperse the graphene oxide in an ethylene glycol / water mixed solvent for ultrasonic treatment;

[0024] Step S7, add potassium tantalate sol, dropwise add a cationic surfactant, and continuously stir at the same time;

[0025] Step S8, adjust PH, and transfer to a high-pressure reaction kettle for hydrothermal reaction;

[0026] Step S9, centrifugally wash the product, and vacuum dry;

[0027] Step S10, place the composite in a mixed gas atmosphere furnace for annealing, and detect the performance.

[0028] Compared with the related art, the performance detection device and the preparation process of the graphite loaded potassium tantalate composite material provided by the application have the following beneficial effects:

[0029] The moving mechanism drives the moving platform and the driving gear plate to move synchronously, can automatically and accurately move the sample groove in the sample seat to the position below the compaction block, and can automatically return the sample seat to the initial position after compaction through the cooperation of the sliding block and the spring, so that the optical detection efficiency of the sample is effectively improved, the compaction block is accurately pressed down through gear transmission, and when the same sample with the same gram weight is detected, the position of the driving gear plate moving to the right can be controlled, so that the downward pressure of the compaction block is accurately controlled, the compaction degree and the flatness of the sample surface are consistent, and the accuracy of the detection data is improved. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description only show some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the drawings shown.

[0031] Figure 1 The best structure schematic diagram provided by the application is shown in the figure.

[0032] Figure 2 The structure schematic diagram of the detection box provided by the application is shown in the figure.

[0033] Figure 3 The structure schematic diagram of the moving detection mechanism provided by the application is shown in the figure.

[0034] Figure 4 The structure schematic diagram of the connecting plate provided by the application is shown in the figure. Figure 3 The structure schematic diagram of the connecting plate provided by the application is shown in the figure.

[0035] Figure 5 The structure schematic diagram of the convenient compaction mechanism provided by the application is shown in the figure.

[0036] Figure 6 The state schematic diagram of the sample seat and the driving gear moving to the right, so that the sliding frame and the compaction block move downward is shown in the figure.

[0037] Figure 7 The structure schematic diagram of the moving mechanism provided by the application is shown in the figure.

[0038] Figure 8 The structure schematic diagram of the switching mechanism provided by the application is shown in the figure.

[0039] Figure 9The connecting plate provided by the present application moves to the left, and under the cooperation of the turnover gear and the turnover tooth, the sample seat is rotated counterclockwise by 45 degrees, as shown in the schematic view of the state;

[0040] Figure 10 The structure schematic view of the detection mechanism provided by the present application is shown in the figure.

[0041] Figure 11 The preparation process flow provided by the present application is shown in the figure.

[0042] Explanation of reference numerals:

[0043] 1, detection box;

[0044] 2, moving detection mechanism; 21, moving platform; 22, sample seat; 23, sliding block; 24, connecting plate; 25, spring; 26, blocking rod;

[0045] 3, convenient compaction mechanism; 31, sliding rail; 32, sliding frame; 33, driving tooth plate; 34, tooth; 35, adjusting screw; 36, compaction block; 37, driving gear; 38, transmission gear; 39, protection frame;

[0046] 4, moving mechanism; 41, two-way threaded screw; 42, connecting support; 43, guide rail; 44, sliding seat; 45, driving motor;

[0047] 5, ultraviolet light emitting diode; 6, optical fiber probe;

[0048] 7, switching mechanism; 71, rotating rod; 72, turnover gear; 73, turnover support; 74, mounting seat; 75, turnover tooth;

[0049] 8, detection mechanism; 81, rotating frame; 82, driving shaft; 83, driven shaft; 84, synchronous wheel; 85, synchronous belt; 86, adjusting gear; 87, turnover frame; 88, industrial camera; 89, ultraviolet light supplement lamp;

[0050] 9, dropper; 10, distance sensor; 11, controller; 12, box door. DETAILED DESCRIPTION

[0051] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0052] The present application provides a kind of graphite load potassium tantalate composite material performance detection device and preparation process.

[0053] First embodiment:

[0054] Please refer to Figures 1 to 6 A performance detection device of graphite loaded potassium tantalate composite material, comprising a detection box 1, a mobile detection mechanism 2, a convenient compaction mechanism 3 and a mobile mechanism 4;

[0055] The mobile detection mechanism 2 comprises a mobile platform 21 and a sample seat 22, the sample seat 22 is arranged on the inner side of the mobile platform 21, the bottom of the mobile platform 21 is fixedly provided with two sliding blocks 23, the surfaces of the two sliding blocks 23 are slidingly connected with connecting plates 24, the inner sides of the two connecting plates 24 are both provided with springs 25, and the right side of the inner wall of the detection box 1 is fixedly provided with two stop rods 26;

[0056] Please combine Figure 3 And Figure 4 : the sample seat 22 is moved forward and backward by starting the electromagnet through the controller 11, the key groove connection relationship between the turnover support 73 and the rotating rod 71 is cancelled, when the two connecting plates 24 drive the mobile platform 21 to move rightward, the right side of the mobile platform 21 contacts the stop rod 26, the mobile platform 21 and the sample seat 22 are pushed to move leftward, the sliding blocks 23 slide leftward on the inner sides of the connecting plates 24, and the springs 25 are contracted;

[0057] Further, when the two connecting plates 24 are reset leftward, the sliding blocks 23 slide rightward through the elastic force of the springs 25, and the positions of the mobile platform 21 and the sample seat 22 are reset;

[0058] Preferably, the opposite sides of the two connecting plates 24 are provided with protruding parts for supporting the sample seat 22, the inner side of the mobile platform 21 is provided with a movable groove matched with the sample seat 22, and the right side of the sample seat 22 is connected with the mobile platform 21 through the electromagnet;

[0059] The convenient compaction mechanism 3 comprises two sliding rails 31, a sliding frame 32 and a driving gear plate 33, the two sliding rails 31 are fixedly arranged on the bottom of the inner wall of the detection box 1, the sliding frame 32 is slidingly connected with the sliding rails 31, two groups of teeth 34 are fixedly arranged on the left side of the sliding frame 32, an adjusting screw rod 35 is perpendicularly and threadedly connected with the inner side of the sliding frame 32, a compaction block 36 is threadedly connected with the bottom end of the adjusting screw rod 35, driving gear wheels 37 and transmission gear wheels 38 are rotationally connected with the front side and the rear side of the inner wall of the detection box 1 through rotating shafts, the two transmission gear wheels 38 are respectively engaged with the two groups of teeth 34, and protection frames 39 are fixedly arranged on the front side and the rear side of the inner wall of the detection box 1;

[0060] Please combine Figure 5 And Figure 6When the driving toothed plate 33 moves to the right and contacts the driving gear 37, the driving gear 37 is driven to rotate counterclockwise, the driving gear 37 drives the transmission gear 38 to rotate clockwise, the transmission gear 38 drives the sliding frame 32 to slide downward on the surface of the slide rail 31 by the tooth 34, and the sliding frame 32 drives the compaction block 36 to move downward, thereby compacting the sample;

[0061] The moving mechanism 4 is transversely arranged in the inside of the detection box 1, and is used for adjusting the detection position of the sample seat 22.

[0062] The inside of the top of the detection box 1 is provided with an ultraviolet light emitting diode 5 and a fiber probe 6, the ultraviolet light emitting diode 5 and the fiber probe 6 are vertically arranged on the top of the sample seat 22, the inside of the sample seat 22 is provided with two sample grooves, the left sample groove is used for placing a standard white board, and the right sample groove is used for placing a detection sample.

[0063] Preferably, when the sample is detected, the ultraviolet light emitting diode 5 and the fiber probe 6 are turned on by the controller 11, the ultraviolet light emitting diode 5 vertically irradiates the sample surface with ultraviolet light, part of the ultraviolet light is absorbed by the sample, and the remaining ultraviolet light is reflected to the fiber probe 6, the fiber probe 6 transmits the reflected light signal to the micro spectrometer, the spectrometer converts the light signal into an electric signal and sends it to the single-chip microcomputer in real time, the single-chip microcomputer processes the data by the built-in algorithm and feeds back to the controller 11 for display, thereby completing the diffuse reflection detection of the sample.

[0064] The working height of the compaction block 36 can be adjusted by rotating the adjusting screw 35, and the compaction block 36 can be replaced according to the size of the sample groove.

[0065] In this embodiment, the moving mechanism 4 drives the moving platform 21 and the driving gear plate 33 to move to the right. When the sample groove on the right side of the sample seat 22 is located at the bottom of the compaction block 36, the right side of the moving platform 21 will be in contact with the stop rod 26. When the moving platform 21 and the driving gear plate 33 continue to move to the right, the position of the sample seat 22 will not change. Through the continuous movement of the driving gear plate 33 to the right, the sliding frame 32 slides down on the surface of the sliding rail 31 under the action of the driving gear 37, the transmission gear 38 and the teeth 34. The downward sliding of the sliding frame 32 drives the compaction block 36 to extrude the sample in the sample groove. The moving mechanism 4 drives the moving platform 21 and the driving gear plate 33 to move synchronously, which can automatically and accurately transfer the sample groove in the sample seat 22 to the position below the compaction block 36. After compaction, the sample seat 22 can automatically return to the initial position through the cooperation of the sliding block 23 and the spring 25. The whole process does not require manual intervention, effectively improves the optical detection efficiency of the sample, and the compaction block 36 realizes accurate pressing through gear transmission. Under the cooperation and feedback of the distance sensor 10, when detecting samples with the same grammage, the position of the driving gear plate 33 moving to the right can be controlled, so as to accurately control the downward pressure of the compaction block 36, make the compaction degree and flatness of the sample surface consistent, and improve the accuracy of the detection data.

[0066] Second embodiment:

[0067] Please refer to Figures 7 to 9 , the moving mechanism 4 includes a double-threaded screw rod 41 transversely rotatably connected to the inner wall of the detection box 1, the surface of the double-threaded screw rod 41 is threadedly connected with a connecting bracket 42, the connecting bracket 42 is fixedly connected to one side of the two connecting plates 24 opposite to each other, the bottom of the inner wall of the detection box 1 is fixedly provided with two guide rails 43, the surfaces of the two guide rails 43 are slidably connected with two sliding seats 44, the four sliding seats 44 are divided into two groups, the opposite sides of the two groups of sliding seats 44 are respectively fixedly connected with the two connecting plates 24, and the sides of the two groups of sliding seats 44 away from each other are respectively fixedly connected with the two driving gear plates 33, and the left side of the detection box 1 is provided with a driving motor 45 for driving the double-threaded screw rod 41 to rotate;

[0068] Please refer to Figure 7 : start the driving motor 45, the driving motor 45 rotates to drive the double-threaded screw rod 41 to rotate, the double-threaded screw rod 41 rotates to drive the connecting bracket 42 to move to the right, the connecting bracket 42 moves to the right to drive the connecting plate 24 to move to the right, the connecting plate 24 moves to the right to drive the sliding seat 44 to slide to the right on the surface of the guide rail 43, and the guide rail 43 moves to the right to drive the driving gear plate 33 to move to the right. Through the reverse rotation of the driving motor 45, the connecting plate 24 and the driving gear plate 33 can be driven to move to the left at the same time;

[0069] Two opposite sides of the connecting plate 24 are rotationally connected with a switching mechanism 7, the switching mechanism 7 comprises rotationally connected rotating rods 71 on the two opposite sides of the connecting plate 24, the surfaces of the two rotating rods 71 are fixedly provided with turnover gears 72, the surfaces of the two rotating rods 71 and located on the opposite sides of the two turnover gears 72 are both key groove connected with turnover supports 73, the top of the two turnover supports 73 are fixedly connected with the bottom of the sample seat 22, the bottom of the inner wall of the detection box 1 is fixedly provided with a mounting seat 74, and the top of the mounting seat 74 is provided with two groups of turnover teeth 75;

[0070] Please combine Figure 8 and Figure 9 : the controller 11 is started to open the electromagnet, the adsorption connection state of the sample seat 22 and the moving platform 21 is cancelled, and the key groove connection of the turnover support 73 and the rotating rod 71 is re-performed, when the connecting plate 24 drives the moving platform 21 and the sample seat 22 to move left, the turnover gear 72 will be moved left at the same time, after the turnover gear 72 contacts with the turnover tooth 75, the sample seat 22 is driven to rotate counterclockwise by 45 degrees through the two turnover supports 73 by the rotating rod 71, so that the sample seat 22 and the sample are switched to other detection state.

[0071] In the embodiment, when the connecting plate 24 moves left, the turnover gear 72 contacts with the turnover tooth 75, and the sample seat 22 is driven to rotate counterclockwise by 45 degrees through the two turnover supports 73 by the rotating rod 71, in the conventional state, the detection sample mainly adopts the principle of perpendicular incident light absorption characteristics, after the sample seat 22 drives the sample to rotate by 45 degrees, the detection can be performed by using the principle of oblique incident light absorption characteristics, the detection process does not need to replace the sample clamp or excessively adjust the equipment, the multifunctional integration can avoid the transfer of the sample between different equipment, reduce the sample loss and transfer time, and improve the continuity of batch detection.

[0072] Third embodiment:

[0073] Please refer to Figure 1 , Figure 7 and Figure 10 , the back of the inner wall of the detection box 1 is fixedly provided with a detection mechanism 8, the detection mechanism 8 comprises a rotating frame 81 fixedly provided on the back of the inner wall of the detection box 1, the inner side of the rotating frame 81 is rotationally connected with a driving shaft 82 and a driven shaft 83, the surfaces of the driving shaft 82 and the driven shaft 83 are fixedly provided with synchronous wheels 84, the surfaces of the two synchronous wheels 84 are sleeved with a synchronous belt 85, the surface of the driving shaft 82 is fixedly provided with an adjusting gear 86, the left side of the inner wall of the detection box 1 is fixedly provided with a turnover frame 87, the inner side of the turnover frame 87 is rotationally connected with an industrial camera 88 through the driven shaft 83, and the surface of the driven shaft 83 is provided with an ultraviolet fill light 89.

[0074] Please combineFigure 10 When the connecting plate 24 drives the turnover gear 72 to move to the left, the driving tooth plate 33 will also move to the left at the same time, and after the driving tooth plate 33 contacts with the adjusting gear 86, the adjusting gear 86 will be driven to rotate clockwise, the adjusting gear 86 drives the driving shaft 82 to rotate clockwise, the driving shaft 82 drives the driven shaft 83 to rotate clockwise through the synchronous wheel 84 and the synchronous belt 85, and the industrial camera 88 and the ultraviolet light 89 are driven to rotate clockwise by the driven shaft 83, so that the angle of the industrial camera 88 is adjusted to the position of the sample seat 22 sample groove after the 45-degree turnover.

[0075] Preferably, after the angle of the industrial camera 88 is adjusted, a drop of pure water is added by using the dropper 9, and the contact angle of the liquid drop on the sample surface is observed. If the liquid drop spreads rapidly, it indicates that the sample has strong hydrophilicity, and if a water bead is formed, it indicates that the sample has strong hydrophobicity. During detection, the sample surface is irradiated with a certain intensity of ultraviolet light, and the industrial camera 88 continuously captures images of the liquid drop. The contact angle change with irradiation time can be analyzed in real time by using software, or the images can be observed by the naked eye through the industrial camera 88.

[0076] The inner side of the top of the detection box 1 is provided with a dropper 9, which is used to add pure water to the sample to evaluate the hydrophilicity or hydrophobicity of the sample. The right side of the connecting bracket 42 and the right side of the inner wall of the detection box 1 are provided with a distance sensor 10.

[0077] Preferably, the pure water drop position of the dropper 9 is located at the top of the right sample groove after the 45-degree turnover, and the distance sensor 10 is electrically connected with the controller 11. Through the distance sensor 10, the moving distance of the moving mechanism 4 can be accurately controlled.

[0078] The front of the detection box 1 is provided with a controller 11 and a box door 12, and the back of the box door 12 is provided with a sealing gasket. The sealing gasket makes the inside of the detection box 1 in a dark environment.

[0079] In this embodiment, when the connecting plate 24 drives the turnover gear 72 to turn 45 degrees, the industrial camera 88 and the ultraviolet light 89 will also rotate under the action of the driving tooth plate 33 and the adjusting gear 86, so that the shooting and light supplementing angles are aligned with the sample seat 22. There is no need to manually adjust the angle, which greatly shortens the process interval of multi-state detection. Moreover, after the industrial camera 88 rotates, the catalyst state of the inner wall or the bottom of the sample groove can be fully shot, avoiding the existence of a shooting dead angle.

[0080] Fourth embodiment:

[0081] Please refer to Figure 11 A preparation process of a graphite loaded potassium tantalate composite material, comprising the following steps:

[0082] Step S1, immerse natural graphite powder into concentrated H2SO4 / HNO3 mixed acid for stirring, deionized water washing, vacuum drying, and obtain graphene oxide;

[0083] Preferably, the ratio of the mixed acid is 3:1; the stirring time is 6-8h, the stirring temperature is 60℃; use deionized water to wash to neutral, the vacuum drying temperature is 60℃;

[0084] Step S2, place the prepared graphene oxide in a tube furnace, anneal, and obtain partially reduced graphene;

[0085] Preferably, anneal at 300℃ under Ar atmosphere, and the annealing time is 2h;

[0086] Step S3, dissolve TaCl5 in ethanol, and add deionized water dropwise to hydrolyze to obtain Ta(OH)5 sol;

[0087] Preferably, the water dropwise adding speed needs to be accurately controlled to prevent the generation of larger particle agglomeration due to too fast water dropwise adding speed;

[0088] Step S4, add K2CO3 solution to adjust PH, and form precursor sol;

[0089] Preferably, adjust the PH to the weak alkaline range of 8-9;

[0090] Step S5, add dispersant, and ultrasonic stirring;

[0091] Preferably, the dispersant is PVA (polyvinyl alcohol) or PEG (polyethylene glycol), the mass fraction is 0.5-1%, and the ultrasonic stirring time is 30min;

[0092] Step S6, disperse graphene oxide in ethylene glycol / water mixed solvent for ultrasonic;

[0093] Preferably, the ratio of ethylene glycol to water is 1:1, and the ultrasonic time is 1h;

[0094] Step S7, add potassium tantalate sol, dropwise add cationic surfactant, and continuously stir at the same time;

[0095] Preferably, the cationic surfactant is cetyltrimethylammonium bromide (CTAB), the concentration is 0.1wt%, and the stirring time is 30min or the ultrasonic time is 10min;

[0096] Step S8, adjust PH, and transfer to a high-pressure reaction kettle for hydrothermal reaction;

[0097] Preferably, adjust PH with ammonia water, the adjusted PH is 10, the hydrothermal reaction temperature is 180℃, and the hydrothermal reaction time is 12h;

[0098] Step S9, centrifugal washing of the product, vacuum drying;

[0099] Preferably, the drying temperature is 60℃.

[0100] Step S10, the composite is placed in a mixed gas atmosphere furnace for annealing, and the performance is detected.

[0101] Preferably, the mixed gas is Ar / H2 (95:5), annealing is carried out at 400℃, the annealing time is 2h, and the heating rate is 2℃ / min.

[0102] In this embodiment, potassium tantalate (KTaO3) has a suitable energy band structure, and in the process of decomposing water to produce hydrogen, potassium tantalate can absorb energy through light or an external electric field, so that the electrons in the valence band jump to the conduction band, thereby generating photo-generated electron-hole pairs. Graphite has good electrical conductivity and can serve as an electron transport channel. In the composite material, graphite is tightly combined with potassium tantalate, and photo-generated electrons can quickly transfer from the conduction band of potassium tantalate to the surface of graphite, while holes remain in the valence band of potassium tantalate. This rapid carrier separation process effectively suppresses the recombination of electron-hole pairs, improves the lifetime and utilization efficiency of carriers, and on the surface of graphite and potassium tantalate, the separated electrons and holes participate in different chemical reactions, respectively. The electrons have reducing properties and can reduce water molecules into hydrogen gas on the cathode surface, and the holes have oxidizing properties and can oxidize water molecules into oxygen gas on the anode surface.

[0103] Please refer to Figures 1 to 10 The working principle of the performance detection device of the graphite loaded potassium tantalate composite material provided by the application is as follows:

[0104] Step S1, open the box door 12, start the electromagnet through the controller 11, move the sample seat 22 forward and backward, cancel the key groove connection relationship between the turnover support 73 and the rotating rod 71, uniformly place the sample with the weight of grams in the sample groove on the right, and then close the box door 12.

[0105] Start the driving motor 45, rotate the driving motor 45 to drive the bidirectional threaded screw rod 41 to rotate, rotate the bidirectional threaded screw rod 41 to drive the connecting bracket 42 to move to the right, move the connecting bracket 42 to the right to drive the connecting plate 24 to move to the right, move the connecting plate 24 to the right to drive the sliding seat 44 to slide to the right on the surface of the guide rail 43, and move the guide rail 43 to the right to drive the driving toothed plate 33 to move to the right.

[0106] Step S2, the mobile platform 21 and the driving gear plate 33 are driven to move right by the moving mechanism 4, when the sample groove on the right side in the sample seat 22 is located at the bottom of the compaction block 36, the right side of the mobile platform 21 will be in contact with the stop rod 26, when the mobile platform 21 and the driving gear plate 33 continue to move right, the position of the sample seat 22 will not change, by continuously moving right of the driving gear plate 33, under the action of the driving gear 37, the transmission gear 38 and the gear teeth 34, the sliding frame 32 slides down on the surface of the sliding rail 31, the sliding frame 32 slides down to drive the compaction block 36 to extrude the sample in the sample groove, after extrusion, the sample seat 22 is reset by the moving mechanism 4;

[0107] Step S3, the ultraviolet light emitting diode 5 and the optical fiber probe 6 are turned on by the controller 11, the ultraviolet light emitting diode 5 irradiates the sample surface vertically, part of the ultraviolet light is absorbed by the sample, and the remaining ultraviolet light is reflected to the optical fiber probe 6, the optical fiber probe 6 transmits the reflected light signal to the micro spectrometer, the spectrometer converts the light signal into an electric signal and sends it to the single-chip microcomputer in real time, the single-chip microcomputer processes the data through the built-in algorithm and feeds back to the controller 11 for display, so as to complete the diffuse reflection detection of the sample;

[0108] Step S4, when it is necessary to switch the detection state, the controller 11 is started to open the electromagnet, the adsorption connection state of the sample seat 22 and the mobile platform 21 is cancelled, and the key groove connection of the turnover bracket 73 and the rotating rod 71 is reconnected, when the connecting plate 24 drives the mobile platform 21 and the sample seat 22 to move left, the turnover gear 72 will also move left, after the turnover gear 72 is in contact with the turnover gear teeth 75, the rotating rod 71 drives the sample seat 22 to rotate counterclockwise by 45 degrees through the two turnover brackets 73;

[0109] Step S5, when the connecting plate 24 drives the turnover gear 72 to move left, the driving gear plate 33 will also move left, after the driving gear plate 33 is in contact with the adjusting gear 86, the adjusting gear 86 will be driven to rotate clockwise, the adjusting gear 86 drives the driving shaft 82 to rotate clockwise, the driving shaft 82 drives the driven shaft 83 to rotate clockwise through the synchronous wheel 84 and the synchronous belt 85, the industrial camera 88 and the ultraviolet light supplement lamp 89 are driven to rotate clockwise, so that the angle of the industrial camera 88 is adjusted to the position of the sample groove of the sample seat 22 after being turned over by 45 degrees;

[0110] Step S6, after the industrial camera 88 is adjusted, a drop of pure water is added by using the dropper 9, and the contact angle of the liquid drop on the sample surface is observed. If the liquid drop spreads rapidly, it indicates that the sample has strong hydrophilicity. If a water bead is formed, it indicates that the sample has strong hydrophobicity. During detection, the sample surface is irradiated with a certain intensity of ultraviolet light source, the industrial camera 88 continuously captures the liquid drop image, the software can be used to analyze the change of the contact angle with the irradiation time in real time, or the industrial camera 88 can be used to capture the image for observation by naked eye, and the hydrophilicity and hydrophobicity are evaluated.

[0111] The above description is only the preferred embodiments of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation, direct / indirect application in other related technical fields, or the like within the concept of the present application, and the contents of the present application specification and drawings are included in the patent protection scope of the present application.

Claims

1. A performance testing device for graphite-supported potassium tantalate composite materials, characterized in that, Includes testing boxes, mobile testing mechanisms, convenient compaction mechanisms, and mobile mechanisms; The mobile detection mechanism includes a mobile platform and a sample holder. The sample holder is located inside the mobile platform. Two sliders are fixedly installed at the bottom of the mobile platform. Connecting plates are slidably connected to the surfaces of the two sliders. Springs are installed on the inner sides of the two connecting plates. Two stop bars are fixedly installed on the right side of the inner wall of the detection box. The right side of the sample holder is connected to the moving platform by an electromagnet. The convenient compaction mechanism includes two slide rails, a sliding frame, and a drive tooth plate. The two slide rails are fixed to the bottom of the inner wall of the testing box. The sliding frame is slidably connected to the slide rails. Two sets of teeth are fixed on the left side of the sliding frame. An adjusting screw is vertically threaded to the inner side of the sliding frame. A compaction block is threaded to the bottom end of the adjusting screw. The front and rear sides of the inner wall of the testing box are rotatably connected to drive gears and transmission gears via rotating shafts. The two transmission gears mesh with the two sets of teeth respectively. Protective frames are fixed to the front and rear sides of the inner wall of the testing box. The moving mechanism is horizontally positioned inside the detection chamber and is used to adjust the detection position of the sample holder; A switching mechanism is rotatably connected to one side of the two connecting plates. The switching mechanism includes a rotating rod rotatably connected to one side of the two connecting plates. A flip gear is fixedly provided on the surface of each of the two rotating rods. A flip bracket is keyway connected to the surface of each of the two rotating rods and on the side opposite to the two flip gears. The top of the two flip brackets is fixedly connected to the bottom of the sample holder. A mounting base is fixedly provided at the bottom of the inner wall of the detection chamber. Two sets of flip teeth are provided on the top of the mounting base. A detection mechanism is fixedly installed on the back of the inner wall of the detection box. The detection mechanism includes a rotating frame fixedly installed on the back of the inner wall of the detection box. An active shaft and a passive shaft are rotatably connected to the inner side of the rotating frame. Synchronous pulleys are fixedly installed on the surfaces of the active shaft and the passive shaft. A synchronous belt is sleeved on the surfaces of the two synchronous pulleys. An adjusting gear is fixedly installed on the surface of the active shaft. A flipping frame is fixedly installed on the left side of the inner wall of the detection box. An industrial camera is rotatably connected to the inner side of the flipping frame through a passive shaft. An ultraviolet supplement light is provided on the surface of the passive shaft. A dropper is provided on the inner side of the top of the testing chamber. The dropper is used to add pure water to the sample to evaluate the hydrophilicity and hydrophobicity of the sample. After the industrial camera angle is adjusted, a drop of pure water is added using a dropper, and the contact angle of the droplet on the sample surface is observed. If the droplet spreads out quickly, it indicates that the sample is highly hydrophilic. If it forms a water droplet, it indicates that the sample is highly hydrophobic. During the test, the sample surface is irradiated with an ultraviolet light source at a certain intensity, and the industrial camera is used to continuously capture images of the droplet. The software is used to analyze the change of the contact angle with the irradiation time in real time, or the image is captured by the industrial camera and observed with the naked eye. An ultraviolet light-emitting diode and an optical fiber probe are installed on the inner side of the top of the detection box. The ultraviolet light-emitting diode and the optical fiber probe are vertically arranged on the top of the sample holder.

2. The performance testing device for graphite-supported potassium tantalate composite material according to claim 1, characterized in that, The sample holder has two sample slots on its inner side. The left sample slot is used to place a standard white board, and the right sample slot is used to place the test sample.

3. The performance testing device for graphite-supported potassium tantalate composite material according to claim 2, characterized in that, The working height of the compaction block can be adjusted by rotating the adjusting screw, and the compaction block can be replaced according to the size of the sample cell.

4. The performance testing device for graphite-supported potassium tantalate composite material according to claim 1, characterized in that, The moving mechanism includes a bidirectional threaded screw that is laterally rotatably connected to the inner wall of the detection box. A connecting bracket is threadedly connected to the surface of the bidirectional threaded screw. The connecting bracket is fixedly connected to the opposite side of two connecting plates. Two guide rails are fixedly provided at the bottom of the inner wall of the detection box. Two sliding seats are slidably connected to the surface of each of the two guide rails. The four sliding seats are divided into two groups, front and rear. The opposite side of the two groups of sliding seats is fixedly connected to the two connecting plates, and the side of the two groups of sliding seats that are separated is fixedly connected to two drive gear plates. A drive motor for driving the bidirectional threaded screw to rotate is provided on the left side of the detection box.

5. The performance testing device for graphite-supported potassium tantalate composite material according to claim 4, characterized in that, Distance sensors are installed on the right side of the connecting bracket and the right side of the inner wall of the detection box.

6. The performance testing device for graphite-supported potassium tantalate composite material according to claim 1, characterized in that, The front of the testing box is equipped with a controller and a door, and the back of the door is equipped with a sealing gasket, which keeps the inside of the testing box in a dark environment.

7. A method for testing the performance of a graphite-supported potassium tantalate composite material, characterized in that, The performance testing method employs the performance testing apparatus and the following steps as described in any one of claims 1-6: Step S1: Immerse natural graphite powder in a concentrated H2SO4 / HNO3 mixed acid and stir, wash with deionized water, and vacuum dry to obtain graphene oxide. Step S2: Place the obtained graphene oxide in a tube furnace and anneal it to obtain partially reduced graphene. Step S3: Dissolve TaCl5 in ethanol, add deionized water dropwise to hydrolyze and generate Ta(OH)5 sol; Step S4: Add K2CO3 solution to adjust pH and form precursor sol; Step S5: Add dispersant and ultrasonically stir; Step S6: Disperse graphene oxide in an ethylene glycol / water mixed solvent and sonicate it. Step S7: Add potassium tantalate sol, and add cationic surfactant dropwise while stirring continuously; Step S8: Adjust the pH and transfer the mixture to a high-pressure reactor for hydrothermal reaction; Step S9: Centrifuge and wash the product, then vacuum dry. Step S10: The composite is placed in a mixed gas atmosphere furnace for annealing, and its performance is tested.

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