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

Abstract

The invention provides a performance detection device and a preparation process of a graphite-loaded potassium tantalate composite material, and relates to the technical field of optical detection, the performance detection device comprises a detection box, a mobile detection mechanism, a convenient compaction mechanism and a mobile mechanism; the movable detection mechanism comprises a movable platform and a sample seat, the sample seat is arranged on the inner side of the movable platform, two sliding blocks are fixedly arranged at the bottom of the movable platform, the surfaces of the two sliding blocks are slidably connected with connecting plates, and springs are arranged on the inner sides of the two connecting plates. According to the scheme, the moving mechanism finally drives the moving platform and the driving toothed plate to synchronously move, a sample groove in the sample seat can be automatically and accurately transferred to the position below the compaction block, the sample seat can automatically return to the initial position through cooperation of the sliding block and the spring after compaction is completed, manual intervention is not needed in the whole process, and the working efficiency is improved. 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 thereof. 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. At present, detection needs manual compaction of the sample, resulting in low detection efficiency. In addition, manual compaction is not convenient for controlling the pressing force. Even the same sample weight will have inconsistent compaction degree and surface flatness under manual compaction, which will cause the reflectance light intensity measurement value to have an unignorable fluctuation, 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 thereof 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 thereof, 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. 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 blocking rods. The convenient compaction 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 compaction block, the front side and the rear side of the inner wall of the detection box are both in rotary connection with driving gear wheels and transmission gear wheels through rotary shafts, the two transmission gear wheels 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. 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.

[0007] 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.

[0008] Preferably, the working height of the compaction block can be adjusted by rotating the adjusting screw rod, and the compaction block can be replaced according to the size of the sample groove.

[0009] 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 two 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 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.

[0010] Preferably, the opposite sides of the two connecting plates are rotatably connected with a switching mechanism, the switching mechanism comprises rotary rods which are rotatably connected to the opposite sides of the two connecting plates, the surfaces of the two rotary rods are both fixedly provided with flip gear wheels, the surfaces of the two rotary rods and located on the sides away from each other of the two flip gear wheels 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.

[0011] 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 arranged on the back of the inner wall of the detection box, the inner side of the rotating frame is rotatably 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 rotatably connected with an industrial camera through the driven shaft, and the surface of the driven shaft is provided with an ultraviolet light supplement lamp.

[0012] 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.

[0013] 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 arrangement of the sealing gasket.

[0014] A preparation process of a graphite-loaded potassium tantalate composite material, comprising the following steps: 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; Step S2, place the prepared graphene oxide in a tube furnace, anneal, and obtain partially reduced graphene; Step S3, dissolve TaCl5 in ethanol, and add deionized water dropwise to hydrolyze to generate Ta(OH)5 sol; Step S4, add K2CO3 solution to adjust PH, and form a precursor sol; Step S5, add a dispersing agent and ultrasonically stir; Step S6, disperse the graphene oxide in an ethylene glycol / water mixed solvent for ultrasonic treatment; Step S7, add potassium tantalate sol, dropwise add a cationic surfactant, and continuously stir at the same time; Step S8, adjust PH, and transfer to a high-pressure reaction kettle for hydrothermal reaction; Step S9, centrifugally wash the product, and vacuum dry; Step S10, place the composite in a mixed gas atmosphere furnace for annealing, and detect the performance.

[0015] Compared with the related art, the performance detection device and the preparation process of the graphite-loaded potassium tantalate composite material have the following beneficial effects: 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 improved, the compaction block is accurately pressed through gear transmission, and when the same gram weight sample 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

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present 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 are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the drawings shown.

[0017] Figure 1 The best structural schematic diagram provided by the present application is shown in the figure. Figure 2 The structural schematic diagram of the detection box provided by the present application is shown in the figure. Figure 3 The structural schematic diagram of the moving detection mechanism provided by the present application is shown in the figure. Figure 4 The structural schematic diagram of the connecting plate is shown in the figure. Figure 3 The structural schematic diagram of the connecting plate is shown in the figure. Figure 5 The structural schematic diagram of the convenient compaction mechanism provided by the present application is shown in the figure. Figure 6 The state schematic diagram of the sample seat and the driving gear moving to the right, and the sliding frame and the compaction block moving downward is shown in the figure. Figure 7 The structural schematic diagram of the moving mechanism provided by the present application is shown in the figure. Figure 8 The structural schematic diagram of the switching mechanism provided by the present application is shown in the figure. Figure 9 The state schematic diagram of the connecting plate moving to the left, and the sample seat rotating counterclockwise by 45 degrees under the cooperation of the turning gear and the turning teeth is shown in the figure. Figure 10 The structural schematic diagram of the detection mechanism provided by the present application is shown in the figure. Figure 11 The preparation process flowchart provided by the present application is shown in the figure.

[0018] Explanation of reference numerals: 1, detection box; 2, mobile detection mechanism; 21, mobile platform; 22, sample seat; 23, sliding block; 24, connecting plate; 25, spring; 26, stop rod; 3, convenient compaction mechanism; 31, sliding rail; 32, sliding frame; 33, driving gear plate; 34, gear tooth; 35, adjusting screw; 36, compaction block; 37, driving gear; 38, transmission gear; 39, protection frame; 4, moving mechanism; 41, two-way threaded screw; 42, connecting support; 43, guide rail; 44, sliding seat; 45, driving motor; 5, ultraviolet light emitting diode; 6, optical fiber probe; 7, switching mechanism; 71, rotating rod; 72, turnover gear; 73, turnover support; 74, mounting seat; 75, turnover gear tooth; 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; 9, dropper; 10, distance sensor; 11, controller; 12, box door. DETAILED DESCRIPTION

[0019] 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 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.

[0020] The present application provides a kind of graphite load potassium tantalate composite material performance detection device and preparation process.

[0021] First embodiment: Please refer to Figures 1 to 6 A kind of graphite load potassium tantalate composite material performance detection device, including detection box 1, mobile detection mechanism 2, convenient compaction mechanism 3 and moving mechanism 4; The mobile detection mechanism 2 includes mobile platform 21 and sample seat 22, the sample seat 22 is arranged in the inner side of mobile platform 21, the bottom of mobile platform 21 is fixed with two sliding blocks 23, the surface of two sliding blocks 23 is slidably connected with connecting plate 24, the inner side of two connecting plates 24 is provided with spring 25, the right side of the inner wall of detection box 1 is fixed with two stop rods 26; Please combine Figure 3 And Figure 4: The electromagnet is turned on through the controller 11, the sample seat 22 is moved forward and backward, 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 moving platform 21 to move rightwards, the right side of the moving platform 21 is in contact with the stop rod 26, the moving platform 21 and the sample seat 22 are pushed to move leftwards, the slider 23 slides leftwards on the inner side of the connecting plate 24, and the spring 25 is retracted; Further, when the two connecting plates 24 reset leftwards, the slider 23 slides rightwards through the elastic force of the spring 25, and the positions of the moving platform 21 and the sample seat 22 are reset; Preferably, the opposite side of the two connecting plates 24 is provided with a protruding part for supporting the sample seat 22, the inner side of the moving 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 moving platform 21 through the electromagnet; The convenient compaction mechanism 3 comprises two sliding rails 31, a sliding frame 32 and a driving toothed plate 33, the two sliding rails 31 are fixedly arranged at the bottom of the inner wall of the detection box 1, the sliding frame 32 is in sliding connection with the sliding rail 31, the left side of the sliding frame 32 is fixedly provided with two groups of teeth 34, the inner side of the sliding frame 32 is perpendicularly connected with an adjusting screw rod 35 in a threaded mode, the bottom end of the adjusting screw rod 35 is connected with a compaction block 36 in a threaded mode, the front side and the rear side of the inner wall of the detection box 1 are rotationally connected with a driving gear 37 and a transmission gear 38 through rotating shafts, the two transmission gears 38 are respectively in meshing connection with the two groups of teeth 34, and the front side and the rear side of the inner wall of the detection box 1 are fixedly provided with protection frames 39. Please combine Figure 5 and Figure 6 : when the driving toothed plate 33 moves rightwards and is in contact with 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 rotates clockwise to drive the sliding frame 32 to slide downwards on the surface of the sliding rail 31, and the sliding frame 32 slides downwards to drive the compaction block 36 to move downwards, so that the sample is compacted; The moving mechanism 4 is horizontally arranged in the detection box 1 and is used for adjusting the detection position of the sample seat 22.

[0022] The inner side 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 inner side of the sample seat 22 is provided with two sample grooves, the left sample groove is used for placing a standard white plate, and the right sample groove is used for placing a detection sample; Preferably, when detecting the sample, the ultraviolet light emitting diode 5 is turned on by the controller 11, and 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 miniature spectrometer, the spectrometer converts the light signal into an electrical 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, thereby completing the diffuse reflection detection of the sample. By rotating the adjusting screw 35, the working height of the compaction block 36 can be adjusted, and the compaction block 36 can be replaced according to the size of the sample groove.

[0023] 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. By continuously moving 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 sliding frame 32 slides down to drive 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 improving the optical detection efficiency of the sample. 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, thereby accurately controlling the downward pressure of the compaction block 36. The compaction degree and flatness of the sample surface are consistent, thereby improving the accuracy of the detection data.

[0024] Second embodiment: Please refer to Figures 7 to 9 The moving mechanism 4 includes a double-thread screw rod 41 transversely rotatably connected to the inner wall of the detection box 1. The surface of the double-thread 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. Two guide rails 43 are fixedly arranged at the bottom of the inner wall of the detection box 1. Two sliding seats 44 are slidably connected to the surfaces of the two guide rails 43. The four sliding seats 44 are divided into two groups. The two groups of sliding seats 44 are fixedly connected to the two connecting plates 24 on the opposite sides, respectively. The two groups of sliding seats 44 are fixedly connected to the two driving gear plates 33 on the sides away from each other, respectively. A driving motor 45 is arranged on the left side of the detection box 1 for driving the double-thread screw rod 41 to rotate. Please combine Figure 7 : start the driving motor 45, the driving motor 45 rotates to drive the bidirectional threaded rod 41 to rotate, the bidirectional threaded 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, the guide rail 43 moves to the right to drive the driving tooth plate 33 to move to the right, and through the reverse rotation of the driving motor 45, the connecting plate 24 and the driving tooth plate 33 can be driven to move to the left at the same time; Two opposite sides of the connecting plate 24 are rotatably connected with a switching mechanism 7, the switching mechanism 7 comprises rotating rods 71 rotatably connected to the opposite sides of the two connecting plates 24, flip gears 72 are fixedly arranged on the surfaces of the two rotating rods 71, flip supports 73 are key groove connected to the surfaces of the two rotating rods 71 and located at the opposite sides of the two flip gears 72, the top portions of the two flip supports 73 are fixedly connected with the bottom of the sample seat 22, a mounting seat 74 is fixedly arranged on the bottom of the inner wall of the detection box 1, and two groups of flip teeth 75 are arranged on the top of the mounting seat 74; Please combine Figure 8 and Figure 9 : the controller 11 is used for starting the electromagnet, canceling the adsorption connection state of the sample seat 22 and the moving platform 21, and re-keying groove connecting the flip support 73 and the rotating rod 71, when the connecting plate 24 drives the moving platform 21 and the sample seat 22 to move to the left, the flip gear 72 will move to the left at the same time, after the flip gear 72 contacts with the flip tooth 75, the rotating rod 71 drives the sample seat 22 to rotate counterclockwise by 45 degrees through the two flip supports 73, so that the sample seat 22 and the sample are switched to other detection states.

[0025] In the embodiment, when the connecting plate 24 moves to the left, the flip gear 72 contacts with the flip tooth 75, and the rotating rod 71 drives the sample seat 22 to rotate counterclockwise by 45 degrees through the two flip supports 73, in the conventional state, the detection of the 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 carried out by using the principle of oblique incident light absorption characteristics, and 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.

[0026] Third embodiment: Please refer to Figure 1 , Figure 7 and Figure 10The 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 light supplement lamp 89. Please combine Figure 10 When the connecting plate 24 drives the turnover gear 72 to move to the left, the driving toothed plate 33 also moves to the left at the same time, after the driving toothed plate 33 contacts with the adjusting gear 86, the adjusting gear 86 is driven to rotate clockwise, the driving shaft 82 is driven to rotate clockwise through the synchronous wheels 84 and the synchronous belt 85, the driven shaft 83 is driven to rotate clockwise through the driving shaft 82, the industrial camera 88 and the ultraviolet light supplement lamp 89 are driven to rotate clockwise through the driven shaft 83, 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; 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, if a water bead is formed, it indicates that the sample has strong hydrophobicity, when detecting, the sample surface is irradiated by using the ultraviolet light source with a certain intensity, the industrial camera 88 is used to continuously shoot the image of the liquid drop, the change of the contact angle with the irradiation time can be analyzed in real time by using software, or the image can be observed by the naked eye through the shooting of the industrial camera 88; The inner side of the top of the detection box 1 is provided with a dropper 9, the dropper 9 is used for adding pure water to the sample, and the hydrophilicity or hydrophobicity of the sample is evaluated, and the right side of the connecting support 42 and the right side of the inner wall of the detection box 1 are provided with a distance sensor 10; Preferably, the pure water dropping position of the dropper 9 is located at the top of the right sample groove after being turned over by 45 degrees, the distance sensor 10 is electrically connected with the controller 11, and the movement distance of the moving mechanism 4 can be accurately controlled through the distance sensor 10.

[0027] The front of the detection box 1 is provided with a controller 11 and a box door 12, the back of the box door 12 is provided with a sealing gasket, and the inside of the detection box 1 is in a dark environment through the sealing gasket.

[0028] 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 as to align the shooting and light supplementing angles with the sample seat 22, without manual angle adjustment, greatly shortening the process interval of multi-state detection, and after the industrial camera 88 rotates, the catalyst state of the inner wall or bottom of the sample groove can be fully shot, avoiding the existence of a shooting dead angle.

[0029] Fourth embodiment: Please refer to Figure 11 A preparation process of a graphite loaded potassium tantalate composite material, comprising the following steps: 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; Preferably, the ratio of the mixed acid is 3:1; the stirring time is 6-8h, and the stirring temperature is 60℃; wash with deionized water until neutral, and the vacuum drying temperature is 60℃; Step S2, place the prepared graphene oxide in a tube furnace for annealing to obtain partially reduced graphene; Preferably, anneal at 300℃ under Ar atmosphere for 2h; Step S3, dissolve TaCl5 in ethanol, and add deionized water dropwise to hydrolyze to generate Ta(OH)5 sol; Preferably, the water dropwise adding speed needs to be accurately controlled to prevent the generation of large particle agglomeration due to too fast water dropwise adding speed; Step S4, add K2CO3 solution to adjust PH to form a precursor sol; Preferably, adjust the PH to a weak alkaline range of 8-9; Step S5, add a dispersing agent and ultrasonically stir; Preferably, the dispersing agent is PVA (polyvinyl alcohol) or PEG (polyethylene glycol), the mass fraction is 0.5-1%, and the ultrasonic stirring time is 30min; Step S6, disperse the graphene oxide in a glycol / water mixed solvent for ultrasonic treatment; Preferably, the ratio of glycol to water is 1:1, and the ultrasonic treatment time is 1h; Step S7, add potassium tantalate sol, dropwise add a cationic surfactant, and continuously stir; Preferably, the cationic surfactant is cetyltrimethylammonium bromide (CTAB), the concentration is 0.1wt%, and the stirring time is 30min or the ultrasonic treatment time is 10min; Step S8, adjust the PH, and transfer to a high-pressure reaction kettle for hydrothermal reaction; Preferably, the pH is adjusted to 10 using ammonia water, and the hydrothermal reaction temperature is 180 DEG C, and the hydrothermal reaction time is 12 hours. Step S9, centrifugal washing of the product, and vacuum drying; Preferably, the drying temperature is 60 DEG C. Step S10, annealing of the composite in a mixed gas atmosphere furnace, and performance detection; Preferably, the mixed gas is Ar / H2 (95:5), the annealing temperature is 400 DEG C, the annealing time is 2 hours, and the temperature rising rate is 2 DEG C / min.

[0030] In the embodiment, the potassium tantalate (KTaO3) has a suitable energy band structure, and in the process of decomposing water to produce hydrogen, the potassium tantalate can absorb energy to make the electrons in the valence band jump to the conduction band through light irradiation or an external electric field, thereby generating photo-generated electron-hole pairs. The graphite has good electrical conductivity, and can serve as an electron transmission channel. In the composite material, the graphite is tightly combined with the potassium tantalate, and the photo-generated electrons can be rapidly transferred from the conduction band of the potassium tantalate to the surface of the graphite, while the holes are left in the valence band of the potassium tantalate. This rapid carrier separation process effectively inhibits the recombination of the electron-hole pairs, and improves the lifetime and utilization efficiency of the carriers. On the surface of the graphite and the potassium tantalate, the separated electrons and holes participate in different chemical reactions, respectively. The electrons have reducing property, and can reduce water molecules into hydrogen gas on the surface of the cathode. The holes have oxidizing property, and can oxidize water molecules into oxygen gas on the surface of the anode.

[0031] 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: 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 indicated weight in the sample groove on the right, and then close the box door 12. Start the driving motor 45, rotate the driving motor 45 to drive the bidirectional threaded lead screw 41 to rotate, drive the connecting support 42 to move to the right through the rotation of the bidirectional threaded lead screw 41, drive the connecting plate 24 to move to the right through the right movement of the connecting support 42, drive the sliding seat 44 to slide to the right on the surface of the guide rail 43 through the right movement of the connecting plate 24, and drive the driving toothed plate 33 to move to the right through the right movement of the guide rail 43. Step S2, the mobile platform 21 and the driving gear plate 33 are driven by the moving mechanism 4 to move to the right, 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 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, 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 the extrusion is completed, the sample seat 22 is reset by the moving mechanism 4; Step S3, the controller 11 is started to turn on the ultraviolet light emitting diode 5 and the optical fiber probe 6, 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 optical fiber probe 6, the optical fiber probe 6 transmits the reflected light signal to the miniature 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; Step S4, when it is necessary to switch the detection state, the controller 11 is started to turn on the electromagnet, the adsorption connection state between the sample seat 22 and the moving platform 21 is cancelled, and the key groove connection between the turnover bracket 73 and the rotating rod 71 is re-established, when the connecting plate 24 drives the moving platform 21 and the sample seat 22 to move to the left, the turnover gear 72 will also move to the 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; Step S5, when the connecting plate 24 drives the turnover gear 72 to move to the left, the driving gear plate 33 will also move to the 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 clockwise rotation of 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 clockwise rotation of the driven shaft 83 drives the industrial camera 88 and the ultraviolet light supplement lamp 89 to rotate clockwise, so as to adjust the angle of the industrial camera 88 to the position of the sample groove of the sample seat 22 after the 45-degree turnover; Step S6, 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, if a water bead is formed, it indicates that the sample has strong hydrophobicity, when detecting, the sample surface is irradiated with ultraviolet light source with a certain intensity, the image of the liquid drop is continuously shot by using the industrial camera 88, the contact angle change with irradiation time can be analyzed in real time by using software, or the contact angle change with irradiation time can be observed by using the industrial camera 88 to shoot and using naked eyes, so as to evaluate the hydrophilicity and hydrophobicity.

[0032] The above merely provides the preferred embodiments of the present application, but is not intended to limit the patent scope of the present application. Any equivalent structure variations or direct / indirect applications in other related technical fields, which are made based on the contents of the present application specification and drawings, shall fall into 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 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.

2. The performance testing device for graphite-supported potassium tantalate composite material according to claim 1, characterized in that, 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 installed on the top of the sample holder. Two sample slots are opened on the inner side of the sample holder. 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 and preparation process of the graphite-supported potassium tantalate composite material according to claim 1, characterized in that, 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.

6. The performance testing device for graphite-supported potassium tantalate composite material according to claim 1, characterized in that, 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. A drive shaft and a driven shaft are rotatably connected to the inner side of the rotating frame. Synchronous pulleys are fixedly installed on the surfaces of the drive shaft and the driven 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 drive 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 driven shaft. An ultraviolet supplement light is provided on the surface of the driven shaft.

7. The performance testing device and preparation process for the graphite-supported potassium tantalate composite material according to claim 4, characterized in that, A dropper is installed on the inner side of the top of the detection chamber. The dropper is used to add pure water to the sample to evaluate the hydrophilicity and hydrophobicity of the sample. Distance sensors are installed on the right side of the connecting bracket and the right side of the inner wall of the detection chamber.

8. 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.

9. A preparation process for a graphite-supported potassium tantalate composite material, characterized in that, The preparation process includes the performance testing device as described in any one of claims 1-8 and the following steps: 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 it; Step S10: The composite is placed in a mixed gas atmosphere furnace for annealing, and its performance is tested.

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