A rare earth composite photocatalyst and its application in catalytic air disinfection

Abstract

The present invention belongs to the field of photocatalyst preparation technology, and in particular discloses a rare earth composite photocatalyst and its application in catalytic air disinfection, the rare earth composite photocatalyst comprises a shell, and a cover plate at the top opening of the shell, the cover plate is hingedly mounted on the top of the shell, a motor is mounted at the center of the top surface of the cover plate, the bottom output end of the motor is connected to a rotating rod, the top of the rotating rod passes through the center of the cover plate, and a feed port is arranged on the top surface of the cover plate. When the outer convex surface of the arc plate is separated from the inner side wall of the shell, the roller always rotates on the inner side wall of the shell, and the rotating roller cooperates to squeeze the large particles of the raw material of the preparation on the inner side wall of the shell, so as to ensure the crushing effect of the raw material of the preparation on the inner side of the shell; when the outer convex surface of the arc plate is attached to the inner side wall of the shell, the two rotating arc plates cooperate to scrape the raw material of the inner side wall of the shell, so as to avoid the crushed raw material from adhering to the inner side wall of the shell.

Description

Technical Field

[0001] The invention belongs to the technical field of photocatalyst preparation, and particularly relates to a rare earth composite photocatalyst and application thereof in catalytic air disinfection. Background Art

[0002] There are many methods for preparing photocatalysts, including but not limited to hydrothermal synthesis, sol-gel method, photodeposition method, etc. Sol-gel method is a method of forming a sol through a chemical reaction in a solution, and then obtaining a solid material through drying and heat treatment. When the existing stirring equipment stirs the raw materials, the large particles of the raw materials will gradually accumulate on the inner wall of the stirring tank, making it impossible for the raw materials to be fully dissolved inside the stirring tank.

[0003] Therefore, it is necessary to invent a rare earth composite photocatalyst and its application in catalytic air disinfection to solve the above problems. Summary of the invention

[0004] In view of the above problems, the present invention provides a rare earth composite photocatalyst and its application in catalytic air disinfection to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a rare earth composite photocatalyst, comprising a shell, and a cover plate at the top opening of the shell, the cover plate being hingedly mounted on the top of the shell, a motor being mounted at the center of the top surface of the cover plate, a rotating rod being transmission-connected to the output end at the bottom of the motor, the top of the rotating rod passing through the center of the cover plate, a feed port being arranged on the top surface of the cover plate, the prepared raw materials being introduced into the shell through the feed port, a plurality of discharge ports being arranged in an annular manner at the bottom of the outer circumferential surface of the shell, a plug being correspondingly clamped to the discharge port, a stirring plate being connected to the bottom end of the rotating rod, and the Both ends of the stirring plate are connected with stirring components, and the stirring component includes an arc-shaped plate, the outer convex surface of the arc-shaped plate corresponds to the inner wall of the outer shell, and an inner rod is fixed on the inner concave surface of the arc-shaped plate. Slide grooves are arranged on the surfaces of both ends of the stirring plate, and the inner ends of the inner rods are correspondingly inserted into the inner sides of the slide grooves, and a sleeve is fixed on the inner ends of the inner rods, and a regulating component for controlling the movement of the sleeve inside the slide groove is sleeved on the sleeve, and a bottom plate is fixed on the bottom surface of the arc-shaped plate, and the bottom surface of the bottom plate is in contact with the bottom surface of the inner side of the outer shell, and the rotating rotating rod utilizes the stirring component on the stirring plate to stir the prepared raw materials inside the outer shell.

[0006] Furthermore, the regulating component includes two regulating frames, which include a first skateboard and a second skateboard that are relatively staggered, and the outer ends of the first skateboard and the second skateboard are both rotatably sleeved with rollers, and the inner side surface of the outer end of the first skateboard and the outer side surface of the outer end of the second skateboard are both fixed with convex edges, the inner side end of the first skateboard is connected to the convex edge of the second skateboard by a spring sheet, and the inner side end of the second skateboard is connected to the convex edge of the first skateboard by a spring sheet, and the elastic force of the spring sheet makes the outer side surfaces of the circumferences of the rollers at the outer ends of the first skateboard and the second skateboard fit with the inner wall of the shell.

[0007] Furthermore, the regulating component also includes a vertical rod, and a sleeve frame is fixed to the top and bottom ends of the vertical rod. The two regulating frames correspond to the two sleeve frames one by one. The surface of the sleeve frame is provided with a through groove corresponding to the regulating frame, and the first slide plate and the second slide plate of the regulating frame pass through the through groove of the sleeve frame.

[0008] Furthermore, the vertical rod is located inside the slide groove of the stirring plate, and the ring is correspondingly sleeved on the surface of the vertical rod, the inner side surface of the inner end of the first slide plate and the outer side surface of the inner end of the second slide plate are fixed with convex rods, and the surfaces of the first slide plate and the second slide plate are both provided with strip grooves corresponding to the convex rods, an inner strip is fixed on the inner side of the strip groove, and the convex rod is slidably sleeved on the surface of the inner strip.

[0009] Furthermore, two parallel ferrules are fixed on the top surface of the bottom plate, a movable bar is inserted through the inside of the ferrule, a push plate is fixed to the inner end of the movable bar, the bottom surface of the push plate is in contact with the inner bottom surface of the shell, the arc plates of the two stirring parts are arranged opposite to each other, and the movable arc plate utilizes the bottom plate to drive the movable bar and the push plate to move.

[0010] Furthermore, a sliding rod is fixed on the surface of the movable bar, a bottom groove corresponding to the sliding rod is provided on the surface of the bottom plate, the sliding rod slides inside the bottom groove, an elastic strip is provided inside the bottom groove, the inner end of the elastic strip is connected to the sliding rod, and the outer end of the elastic strip is connected to the outer end of the bottom groove.

[0011] Furthermore, the two relatively close bottom plates both utilize the elastic force of the elastic strip to drive the moving strip at the top of the slide rod and the push plate to move synchronously.

[0012] The present invention also provides an application of the rare earth composite photocatalyst as described above in catalytic air disinfection, wherein the rare earth composite photocatalyst is used to promote the catalytic disinfection of air by the rare earth composite photocatalyst under illumination.

[0013] Technical effects and advantages of the present invention:

[0014] 1. When the outer convex surface of the arc plate is separated from the inner wall of the shell, the roller always rotates on the inner wall of the shell, and the rotating roller cooperates to squeeze the large particles of the raw materials on the inner wall of the shell to ensure the crushing effect of the raw materials on the inner side of the shell; when the outer convex surface of the arc plate is in contact with the inner wall of the shell, the two rotating arc plates cooperate to scrape the raw materials on the inner wall of the shell to prevent the crushed raw materials from adhering to the inner wall of the shell.

[0015] 2. The present invention uses the elastic force of the spring sheet to prevent the outer convex surface of the arc plate from directly impacting the inner wall of the shell, thereby preventing the arc plate and the inner wall of the shell from being damaged by impact.

[0016] 3. The present invention uses two push plates to contact each other, and the impact force drives the slide bar to squeeze the elastic strip inside the bottom groove through the moving strip. The elastic force of the elastic strip absorbs the impact force of the two push plates to prevent the ring from directly impacting the inner end of the slide groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 2 is a schematic diagram of the overall housing for preparing the rare earth composite photocatalyst according to an embodiment of the present invention;

[0018] Figure 2 is a schematic diagram of the inner side components of the housing according to an embodiment of the present invention;

[0019] Figure 3 Schematic diagram of the fixed connection between the arc plate and the bottom plate of an embodiment of the present invention;

[0020] Figure 4 Schematic diagram of a vertical rod in an embodiment of the present invention, in which the top and bottom ends are fixedly connected to a sleeve frame;

[0021] Figure 5 is a schematic diagram of a control component of an embodiment of the present invention being installed on a stirring plate;

[0022] In the figure: 1. shell; 2. cover plate; 3. motor; 4. rotating rod; 5. feed port; 6. discharge port; 7. plug; 8. stirring plate; 9. curved plate; 10. inner rod; 11. sleeve ring; 12. bottom plate; 13. first slide plate; 14. second slide plate; 15. roller; 16. spring piece; 17. vertical rod; 18. sleeve frame; 19. convex rod; 20. inner strip; 21. card sleeve; 22. moving strip; 23. push plate; 24. slide rod; 25. elastic strip. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0024] The present invention provides a rare earth composite photocatalyst, such as Figures 1 to 5As shown, it includes a shell 1 and a cover plate 2 at the top opening of the shell 1, the cover plate 2 is hingedly installed on the top of the shell 1, a motor 3 is installed at the center of the top surface of the cover plate 2, the bottom output end of the motor 3 is transmission-connected with a rotating rod 4, the top of the rotating rod 4 passes through the center of the cover plate 2, a feed port 5 is arranged on the top surface of the cover plate 2, and the prepared raw materials are introduced into the shell 1 through the feed port 5, a plurality of discharge ports 6 are arranged in an annular manner at the bottom of the outer circumferential side surface of the shell 1, and a plug 7 is correspondingly connected to the discharge port 6, the bottom end of the rotating rod 4 is connected to a stirring plate 8, and both ends of the stirring plate 8 are connected to stirring components. The stirring component includes an arc-shaped plate 9, the outer convex surface of the arc-shaped plate 9 corresponds to the inner wall of the outer shell 1, and an inner rod 10 is fixed to the inner concave surface of the arc-shaped plate 9. The surfaces of both ends of the stirring plate 8 are provided with slide grooves, and the inner ends of the inner rod 10 are correspondingly inserted into the inner sides of the slide grooves. A collar 11 is fixed to the inner end of the inner rod 10, and the collar 11 is sleeved with a regulating component for controlling the movement of the collar 11 inside the slide groove. A bottom plate 12 is fixed to the bottom surface of the arc-shaped plate 9, and the bottom surface of the bottom plate 12 is in contact with the inner bottom surface of the outer shell 1. The rotating rotating rod 4 uses the stirring component on the stirring plate 8 to stir the prepared raw materials inside the outer shell 1. A plurality of plugs 7 are correspondingly blocked with the discharge ports 6, the cover plate 2 is hingedly placed on the top opening of the outer shell 1, and the preparation raw materials required for the rare earth composite photocatalyst are introduced into the inner side of the outer shell 1 through the feed port 5, and the motor 3 is started. The rotating rod 4 at the output end of the motor 3 drives the stirring plate 8 to rotate inside the outer shell 1, and the rotating stirring plate 8 drives the arc plate 9 and the bottom plate 12 of the stirring component to rotate, and the stirring plate 8 and the stirring component are used to stir the preparation raw materials inside the outer shell 1.

[0025] The prepared raw materials enter the inner side of the outer shell 1, and the powdered raw materials in the prepared raw materials are accumulated at the inner bottom of the outer shell 1. The rotating arc plate 9 rolls up the powdered raw materials at the inner bottom of the outer shell 1 using the bottom plate 12, and the stirring plate 8 and the stirring component are used to ensure the dissolution effect of the powdered raw materials, and improve the mixing effect of different raw materials inside the outer shell 1.

[0026] The preparation method of the rare earth composite photocatalyst is as follows:

[0027] S1, selecting butyl titanate and mixing it with anhydrous ethanol to obtain liquid A for preparing raw materials;

[0028] S2, selecting deionized water, anhydrous ethanol and glacial acetic acid, and adding cerium nitrate to obtain liquid B for preparing raw materials;

[0029] S3, introducing the A liquid for preparing the raw material into the inner side of the shell 1 through the feed port 5, and adding the B liquid for preparing the raw material into the inner side of the shell 1 in stages, and stirring and mixing the A liquid and the B liquid by using the stirring plate 8 and the stirring member to obtain a mixed solution;

[0030] S4. After stirring, the plug 7 of the discharge port 6 is removed, the mixed solution is discharged from the discharge port 6, the mixed solution is collected, and the mixed solution is allowed to stand to obtain a gel, the gel is dried, and the dried product is ground to obtain a rare earth composite photocatalyst.

[0031] exist Figure 2 and Figure 5 In the embodiment, the regulating component includes two regulating frames, which include a first and second sleds 13 and 14 that are relatively displaced, and the outer ends of the first and second sleds 13 and 14 are both rotatably sleeved with rollers 15, and the inner side surface of the outer end of the first sled 13 and the outer side surface of the outer end of the second sled 14 are both fixed with convex edges, and the inner side end of the first sled 13 is connected to the convex edge of the second sled 14 by means of a spring sheet 16, and the inner side end of the second sled 14 is connected to the convex edge of the first sled 13 by means of a spring sheet 16, and the elastic force of the spring sheet 16 makes the outer circumferential side surface of the rollers 15 at the outer ends of the first and second sleds 13 and 14 fit with the inner side wall of the housing 1. The elastic force of the spring sheet 16 cooperates with the convex edge to make the first and second sleds 13 and 14 move in a displaced manner, that is, the inner side end of the first sled 13 is away from the convex edge of the second sled 14, and the inner side end of the second sled 14 is away from the convex edge of the first sled 13, and the moving first and second sleds 13 and 14 both drive the rollers 15 to move until the outer circumferential side surface of the rollers 15 fits with the inner side wall of the housing 1. When the rotating rod 4 drives the ring 11 to rotate by the stirring plate 8, the rotating ring 11 drives the curved plate 9 to rotate synchronously through the inner rod 10. The centrifugal force generated by the rotation makes the curved plate 9 gradually move away from the stirring plate 8, and the outer side of the curved plate 9 gradually approaches the inner wall of the shell 1. The moving curved plate 9 uses the inner rod 10 to pull the ring 11 to slide inside the slide groove of the stirring plate 8, and the moving ring 11 pulls the regulating frame to move. The pressure of the inner wall of the shell 1 on the roller 15 causes the first slide plate 13 and the second slide plate 14 to move in an offset manner, that is, the inner end of the first slide plate 13 cooperates with the convex edge of the second slide plate 14 to squeeze the spring piece 16, and the inner end of the second slide plate 14 cooperates with the convex edge of the first slide plate 13 to squeeze the spring piece 16. The elastic force of the spring piece 16 prevents the outer convex surface of the curved plate 9 from directly impacting the inner wall of the shell 1, thereby preventing the curved plate 9 and the inner wall of the shell 1 from being damaged by impact.

[0032] exist Figure 2 , Figure 4 and Figure 5In the embodiment, the regulating component further comprises a vertical rod 17, a sleeve frame 18 is fixed to the top and bottom of the vertical rod 17, two regulating frames correspond to the two sleeve frames 18, the surface of the sleeve frame 18 is provided with a through groove corresponding to the regulating frame, and the first slide plate 13 and the second slide plate 14 of the regulating frame pass through the through groove of the sleeve frame 18. The vertical rod 17 is inside the slide groove of the stirring plate 8, and the sleeve ring 11 is correspondingly sleeved on the surface of the vertical rod 17, the inner side surface of the inner end of the first slide plate 13 and the outer side surface of the inner end of the second slide plate 14 are fixed with a convex rod 19, the surface of the first slide plate 13 and the second slide plate 14 are provided with a strip groove corresponding to the convex rod 19, the inner side of the strip groove is fixed with an inner strip 20, and the convex rod 19 is slidably sleeved on the surface of the inner strip 20. When the ring 11 moves, the ring 11 uses the vertical rod 17 to drive the frame 18 to move synchronously. Since the vertical rod 17 is set as a square rod and the ring 11 is provided with a square groove corresponding to the square rod, the moving vertical rod 17 will not rotate inside the ring 11. The moving vertical rod 17 uses the frame 18 to drive the regulating frame to move synchronously.

[0033] The pressure of the inner wall of the shell 1 on the roller 15 causes the protruding rod 19 on the first slide 13 and the protruding rod 19 on the second slide 14 to slide on the surfaces of the two inner strips 20 respectively when the first slide 13 and the second slide 14 are displaced. The protruding rod 19 and the inner strips 20 cooperate to limit the first slide 13 and the second slide 14, thereby preventing the first slide 13 and the second slide 14 from being offset or separated during the displaced movement.

[0034] exist Figure 3 and Figure 5 In the embodiment, two parallel ferrules 21 are fixed on the top surface of the bottom plate 12, a moving bar 22 is inserted through the inside of the ferrule 21, a push plate 23 is fixed on the inner end of the moving bar 22, the bottom surface of the push plate 23 is in contact with the inner bottom surface of the housing 1, and the arc plates 9 of the two stirring components are arranged oppositely, and the moving arc plates 9 drive the moving bar 22 and the push plate 23 to move by the bottom plate 12. When the centrifugal force causes the two arc plates 9 to separate from each other, the arc plates 9 drive the bottom plate 12 to move synchronously, and at this time, the two bottom plates 12 are away from each other. When the rotation speed of the rotating rod 4 decreases, the centrifugal force of the arc plate 9 decreases, and the elastic force of the spring piece 16 rebounds to cause the first slide plate 13 and the second slide plate 14 to move in an offset manner, that is, the two rollers 15 move away from each other, and the elastic force of the spring piece 16 makes the outer circumferential surface of the roller 15 always fit the inner wall of the shell 1, and the pressure of the roller 15 on the inner wall of the shell 1 causes the regulating frame to move, and the frame 18 uses the vertical rod 17 to pull the sleeve ring 11 to move inside the slide groove of the stirring plate 8, and the sleeve ring 11 uses the inner rod 10 to pull the arc plate 9 away from the inner wall of the shell 1, and at this time, the two opposite arc plates 9 approach each other, and at the same time, the two bottom plates 12 approach each other.

[0035] When the outer convex surface of the arc plate 9 is separated from the inner wall of the shell 1, the roller 15 always rotates on the inner wall of the shell 1, and the rotating roller 15 cooperates to squeeze the large particles of the prepared raw materials on the inner wall of the shell 1 to ensure the crushing effect of the prepared raw materials on the inner side of the shell 1; when the outer convex surface of the arc plate 9 is in contact with the inner wall of the shell 1, the two rotating arc plates 9 cooperate to scrape the prepared raw materials on the inner wall of the shell 1 to prevent the crushed prepared raw materials from adhering to the inner wall of the shell 1.

[0036] exist Figure 2 , Figure 3 and Figure 5 In the embodiment, a slide bar 24 is fixed on the surface of the moving bar 22, and a bottom groove corresponding to the slide bar 24 is provided on the surface of the bottom plate 12. The slide bar 24 slides inside the bottom groove, and an elastic strip 25 is provided inside the bottom groove. The inner end of the elastic strip 25 is connected to the slide bar 24, and the outer end of the elastic strip 25 is connected to the outer end of the bottom groove. The two relatively close bottom plates 12 both use the elastic force of the elastic strip 25 to drive the moving bar 22 and the push plate 23 at the top of the slide bar 24 to move synchronously. When the rotation speed of the rotating rod 4 is reduced, the elastic force of the spring sheet 16 makes the two bottom plates 12 approach each other, and the moving bottom plate 12 uses the elastic force of the elastic strip 25 to drive the slide bar 24 to move. At this time, the slide bar 24 uses the moving bar 22 to drive the push plate 23 to move synchronously, until the two relatively push plates 23 contact each other, and the elastic force of the elastic strip 25 absorbs the impact force of the two push plates 23, so as to prevent the collar 11 from directly impacting the inner end of the slide groove. After the two push plates 23 contact each other, the impact force drives the slide bar 24 to squeeze the elastic strip 25 inside the bottom groove through the moving strip 22, and the clamping sleeve 21 cooperates to limit the moving strip 22 to prevent the moving strip 22 from falling from the top surface of the bottom plate 12.

[0037] The present invention also provides an application of the rare earth composite photocatalyst as described above in catalytic air disinfection, wherein the rare earth composite photocatalyst is used to promote the catalytic disinfection of air by the rare earth composite photocatalyst under illumination.

[0038] Working principle of the present invention:

[0039] Reference Figures 1 to 5 As shown, a plurality of plugs 7 are correspondingly blocked with the discharge port 6, the cover plate 2 is hingedly placed on the top opening of the outer shell 1, the preparation raw materials required for the rare earth composite photocatalyst are introduced into the inner side of the outer shell 1 through the feed port 5, the motor 3 is started, and the rotating rod 4 at the output end of the motor 3 drives the stirring plate 8 to rotate inside the outer shell 1, and the rotating stirring plate 8 drives the arc plate 9 and the bottom plate 12 of the stirring component to rotate, and the stirring plate 8 and the stirring component are used to stir the preparation raw materials inside the outer shell 1.

[0040] The centrifugal force generated by the rotation makes the arc plate 9 gradually move away from the stirring plate 8, and the outer side surface of the arc plate 9 gradually approaches the inner wall of the shell 1. The moving arc plate 9 uses the inner rod 10 to pull the ring 11 to slide on the inner side of the slide groove of the stirring plate 8, and the moving ring 11 pulls the regulating frame to move. The pressure of the inner wall of the shell 1 on the roller 15 makes the first slide plate 13 and the second slide plate 14 move in an offset manner, that is, the inner end of the first slide plate 13 cooperates with the convex edge of the second slide plate 14 to squeeze the spring piece 16, and the inner end of the second slide plate 14 cooperates with the convex edge of the first slide plate 13 to squeeze the spring piece 16. The elastic force of the spring piece 16 prevents the outer convex surface of the arc plate 9 from directly impacting the inner wall of the shell 1, thereby preventing the arc plate 9 and the inner wall of the shell 1 from being damaged by impact.

[0041] When the rotation speed of the rotating rod 4 decreases, the centrifugal force of the arc plate 9 decreases, and the elastic force of the spring piece 16 rebounds to cause the first slide plate 13 and the second slide plate 14 to move in an offset manner, that is, the two rollers 15 move away from each other, and the elastic force of the spring piece 16 makes the outer circumferential surface of the roller 15 always fit the inner wall of the shell 1, and the pressure of the roller 15 on the inner wall of the shell 1 causes the regulating frame to move, and the frame 18 uses the vertical rod 17 to pull the sleeve ring 11 to move inside the slide groove of the stirring plate 8, and the sleeve ring 11 uses the inner rod 10 to pull the arc plate 9 away from the inner wall of the shell 1, and at this time, the two opposite arc plates 9 approach each other, and at the same time, the two bottom plates 12 approach each other.

[0042] When the two bottom plates 12 approach each other, the moving bottom plate 12 uses the elastic force of the elastic strip 25 to drive the slide bar 24 to move. At this time, the slide bar 24 uses the moving strip 22 to drive the push plate 23 to move synchronously until the two opposite push plates 23 contact each other. The elastic force of the elastic strip 25 absorbs the impact force of the two push plates 23 to prevent the ring 11 from directly impacting the inner end of the slide groove.

[0043] When the outer convex surface of the arc plate 9 is separated from the inner wall of the shell 1, the roller 15 always rotates on the inner wall of the shell 1, and the rotating roller 15 cooperates to squeeze the large particles of the prepared raw materials on the inner wall of the shell 1 to ensure the crushing effect of the prepared raw materials on the inner side of the shell 1; when the outer convex surface of the arc plate 9 is in contact with the inner wall of the shell 1, the two rotating arc plates 9 cooperate to scrape the prepared raw materials on the inner wall of the shell 1 to prevent the crushed prepared raw materials from adhering to the inner wall of the shell 1.

[0044] After stirring, the plug 7 of the discharge port 6 is removed, the mixed solution is discharged from the discharge port 6, the mixed solution is collected, and the mixed solution is allowed to stand to obtain a gel, the gel is dried, and the dried product is ground to obtain a rare earth composite photocatalyst.

[0045] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. A rare earth composite photocatalyst, comprising a housing (1), and a cover plate (2) located at the top opening of the housing (1), wherein the cover plate (2) is hingedly mounted on the top of the housing (1), characterized in that: A motor (3) is installed at the center of the top surface of the cover plate (2), and a rotating rod (4) is drivingly connected to the output end at the bottom of the motor (3). The top end of the rotating rod (4) passes through the center of the cover plate (2). A feed port (5) is provided on the top surface of the cover plate (2), and the prepared raw materials are introduced into the interior of the shell (1) through the feed port (5). A plurality of discharge ports (6) are arranged in an annular manner at the bottom of the outer circumferential surface of the shell (1), and plugs (7) are correspondingly connected to the discharge ports (6). The bottom end of the rotating rod (4) is connected to a stirring plate (8), and both ends of the stirring plate (8) are connected to stirring components, and the stirring components include an arc plate (9), and the outer side of the arc plate (9) is provided with a plurality of discharge ports (6) arranged in an annular manner. The convex surface corresponds to the inner wall of the outer shell (1); an inner rod (10) is fixed to the inner concave surface of the arc plate (9); sliding grooves are provided on both end surfaces of the stirring plate (8); the inner end of the inner rod (10) is correspondingly inserted into the inner side of the sliding groove; a sleeve (11) is fixed to the inner end of the inner rod (10); the sleeve (11) is sleeved with a regulating component for controlling the sleeve (11) to move inside the sliding groove; a bottom plate (12) is fixed to the bottom surface of the arc plate (9); the bottom surface of the bottom plate (12) is in contact with the inner bottom surface of the outer shell (1); the rotating rotating rod (4) uses the stirring component on the stirring plate (8) to stir the prepared raw materials inside the outer shell (1); The regulating component comprises two regulating frames, the regulating frames comprising a first slide plate (13) and a second slide plate (14) which are relatively offset, the outer ends of the first slide plate (13) and the second slide plate (14) being rotatably sleeved with rollers (15), the inner side surface of the outer end of the first slide plate (13) and the outer side surface of the outer end of the second slide plate (14) being fixed with convex edges, the inner side end of the first slide plate (13) being connected to the convex edge of the second slide plate (14) by means of a spring sheet (16), and the inner side end of the second slide plate (14) being connected to the convex edge of the first slide plate (13) by means of a spring sheet (16), and the elastic force of the spring sheet (16) causing the outer circumferential side surfaces of the rollers (15) at the outer ends of the first slide plate (13) and the second slide plate (14) to fit with the inner side wall of the housing (1); The regulating component further comprises a vertical rod (17), a sleeve frame (18) being fixed to the top and bottom ends of the vertical rod (17), the two regulating frames corresponding to the two sleeve frames (18) one by one, a through slot corresponding to the regulating frame being arranged on the surface of the sleeve frame (18), and a first slide plate (13) and a second slide plate (14) of the regulating frame passing through the through slot of the sleeve frame (18).

2. The rare earth composite photocatalyst according to claim 1, characterized in that: The vertical rod (17) is located inside the slide groove of the stirring plate (8), and the collar (11) is correspondingly sleeved on the surface of the vertical rod (17). The inner side surface of the inner end of the first slide plate (13) and the outer side surface of the inner end of the second slide plate (14) are both fixed with a convex rod (19). The surfaces of the first slide plate (13) and the second slide plate (14) are both provided with a strip groove corresponding to the convex rod (19). An inner strip (20) is fixed inside the strip groove, and the convex rod (19) is slidably sleeved on the surface of the inner strip (20).

3. The rare earth composite photocatalyst according to claim 2, characterized in that: Two parallel clamping sleeves (21) are fixed on the top surface of the bottom plate (12), a moving bar (22) is inserted through the inside of the clamping sleeve (21), a push plate (23) is fixed to the inner end of the moving bar (22), the bottom surface of the push plate (23) is in contact with the inner bottom surface of the shell (1), the arc plates (9) of the two stirring components are arranged opposite to each other, and the movable arc plate (9) drives the moving bar (22) and the push plate (23) to move by using the bottom plate (12).

4. The rare earth composite photocatalyst according to claim 3, characterized in that: A sliding rod (24) is fixed on the surface of the movable bar (22), a bottom groove corresponding to the sliding rod (24) is provided on the surface of the bottom plate (12), the sliding rod (24) slides inside the bottom groove, an elastic strip (25) is provided inside the bottom groove, the inner end of the elastic strip (25) is connected to the sliding rod (24), and the outer end of the elastic strip (25) is connected to the outer end of the bottom groove.

5. The rare earth composite photocatalyst according to claim 4, characterized in that: The two relatively close bottom plates (12) both utilize the elastic force of the elastic strip (25) to drive the moving strip (22) and the push plate (23) at the top of the slide rod (24) to move synchronously.

6. A use of the rare earth composite photocatalyst as claimed in claim 5 for catalytic air disinfection, characterized in that: The rare earth composite photocatalyst is used for promoting the catalytic disinfection of air by the rare earth composite photocatalyst under light.

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