Photocatalytic in-situ reaction device

Abstract

The utility model belongs to in situ research test, concretely relates to a photocatalysis in situ reaction device, including the casing of box shape, be provided with the airtight cavity for containing sample in casing, the first, second window of mouth area opposite and intercommunication airtight cavity is respectively set up on the opposite two side box surfaces of casing, the second window is covered and is used for the second light -transmitting diaphragm of its mouth area sealing, the transmission light beam that X light beam is by the first window and is shot into airtight cavity and is formed after irradiating sample, the second window is shot out, the quartz glass plate that is used for sealing its mouth area is covered on the first window, the incident hole that is used for X light beam and is shot into airtight cavity and irradiates sample is set up on the quartz glass plate, the first light -transmitting diaphragm that is set up on the hole area of incident hole is high to X light beam, and catalytic reaction light beam is then through the board body part of quartz glass plate and is shot into airtight cavity and irradiates sample, both ensure the high transmissivity of X ray at the first window, and also take into account the high permeability of catalytic reaction light at the first window.

Description

Technical Field

[0001] This utility model relates to in-situ research and testing, specifically to a photocatalytic in-situ reaction device. Background Technology

[0002] X-ray absorption fine structure (XAFS) spectroscopy, due to its locality, element selectivity, sensitivity, orientation, and versatility, has become a powerful tool for studying the structure of matter, with wide applications in materials science, energy, chemistry, environmental science, and life sciences. In in-situ XAFS characterization of photocatalysts, after a photocatalyst (usually a semiconductor material) absorbs light energy (typically visible or ultraviolet light), electrons transition from the ground state to an excited state. Electrons and holes are separated, generating electron-hole pairs and charge carriers. The electronic structure, or the electron transfer bias of internal elements, or the transformation of structural configuration, is directly reflected in the XAFS spectrum. By measuring the spectrum in real time using in-situ XAFS, one can in turn characterize the catalyst structure, the coordination structure at the interface, the electronic structure and kinetics of the catalytic active center, and much other information. This technique has become one of the important methods for studying photocatalysts.

[0003] The patent document entitled "High-throughput High-Temperature In-situ X-ray Absorption Spectroscopy Research Device and Its Operation Method" (Publication No. CN202411399625.X) discloses a technical solution including a vacuum furnace module with an opening at the top, X-ray incident light-passing holes and corresponding X-ray exit light-passing holes with their optical axes aligned on two opposite sides, and a vacuum interface for connecting to an external vacuum pumping device on the other side; and a heating module that extends into and connects to the vacuum furnace module through the opening of the vacuum furnace module, including a sample holder, heating elements and thermocouples. The heating elements and thermocouples are positioned adjacent to the sample holder and heat the sample holder and measure its temperature. The X-ray incident light-passing holes and X-ray exit light-passing holes have a combined shape of two upper and lower semicircles and a rectangle with a horizontal length equal to the diameter of the semicircles and a vertical length less than the diameter of the semicircles. The sample holder has multiple grooves to accommodate multiple sample chambers, and the grooves are surrounded by clearance slots. The X-ray incident and exit apertures are covered by a thin film, which can be made of polyimide to achieve high X-ray transmittance. The paper also discloses a transmission X-ray absorption spectrum measurement mode and a fluorescence X-ray absorption spectrum measurement mode (i.e., a reflection mode).

[0004] The patent document entitled "Sealed Chamber, Mounting Base and Assembly for Installing Sealed Chamber" (Publication No. CN221679534U) discloses a sealed chamber comprising: a chamber body having a accommodating cavity and a first opening and a second opening communicating with the accommodating cavity; a cover installed on the chamber body and used to open or close the first opening; a viewing assembly installed at the second opening of the chamber body and closing the second opening; a sampling assembly for taking samples; and a fixing assembly installed within the accommodating cavity and used to fix the sampling assembly. With the sample fixed within the chamber body, it is exposed to the outside through the viewing assembly. The viewing assembly closes the second opening with a light-transmitting structure, allowing light to enter from one side and exit from the other. The composition of the sample can be analyzed by detecting the emitted light. The light-transmitting window can be a polyimide film or a beryllium window.

[0005] X-ray transmittance not only affects the quantitative analysis of elements in a sample but also relates to the precise study of the electronic states and local structure of materials. In the aforementioned technical solutions, to achieve high X-ray transmittance, the light-transmitting aperture or window is covered with a polyimide film, enabling high X-ray transmission. However, in in-situ XAFS characterization testing of photocatalysts, catalytic reaction light (usually visible or ultraviolet light) is required to irradiate the sample, allowing the catalyst to absorb light energy. The light-transmitting aperture or window covered with a polyimide film has poor transmittance to catalytic reaction light, resulting in insufficient photon energy absorption by the catalyst. This hinders the photocatalytic reaction from reaching the activated state, negatively impacting the research and analysis results of the photocatalyst. Therefore, how to ensure both high X-ray transmittance at the light-transmitting aperture or window and high transmittance of catalytic reaction light remains a problem to be solved in both transmission and reflection measurement modes. Summary of the Invention

[0006] The first objective of this invention is to provide a photocatalytic in-situ reaction device that, in transmission detection mode, can ensure both high X-ray transmittance at the window and transmittance of catalytic reaction light, thereby promoting the photocatalytic reaction to reach the activated state.

[0007] To achieve the above objectives, the technical solution adopted is as follows: a photocatalytic in-situ reaction device, comprising a box-shaped shell, a sealed cavity for containing a sample, and first and second windows with opposite openings communicating with the sealed cavity on opposite sides of the shell. A second transparent film for sealing the opening of the second window is placed on top of the second window. An X-ray beam enters the sealed cavity through the first window and, after irradiating the sample, forms a transmitted beam that exits through the second window. A quartz glass plate for sealing the opening of the first window is placed on top of the first window. An entrance hole for the X-ray beam to enter the sealed cavity and irradiate the sample is opened on the quartz glass plate. A first transparent film for sealing the entrance hole is placed on the hole area. The catalytic reaction beam enters the sealed cavity and irradiates the sample through the plate body of the quartz glass plate.

[0008] Compared with the prior art, the technical effect of this utility model is as follows: In the transmission detection mode, an entrance hole is opened on the quartz glass plate for X-ray beams to enter the sealed cavity and irradiate the sample. A first light-transmitting film with high X-ray transmittance is set on the aperture area of ​​the entrance hole. The catalytic reaction beam enters the sealed cavity and irradiates the sample through the plate body of the quartz glass plate. This ensures both the high transmittance of X-rays at the first window and the high transmittance of catalytic reaction light at the first window, promoting the photocatalytic reaction to reach the activated state, which is beneficial for researchers to accurately study and analyze the photocatalyst.

[0009] Another objective of this invention is to provide a photocatalytic in-situ reaction device that, in reflection detection mode, can still ensure high transmittance of the incident X-ray light and the reflected light formed after irradiating the sample at the window, as well as ensure the transmittance of the catalytic reaction light.

[0010] To achieve the above objectives, the technical solution adopted is as follows: a photocatalytic in-situ reaction device, comprising a box-shaped shell, a sealed cavity for accommodating a sheet-like sample, a first window communicating with the sealed cavity on one side of the shell, with the sample surface perpendicular to the penetrating direction of the first window, a quartz glass plate covering the first window for sealing its opening, an entrance hole for X-ray beams to enter the sealed cavity and irradiate the sample on the quartz glass plate, the incident direction of the X-ray beams being arranged at an angle to the sample surface, a first light-transmitting film for sealing the entrance hole's opening area, the catalytic reaction beam entering the sealed cavity and irradiating the sample through the plate portion of the quartz glass plate, a reflection hole also being provided on the quartz glass plate, the reflection hole and the entrance hole being symmetrically arranged on both sides of the center of the quartz glass plate's surface, a third light-transmitting film for sealing the reflection hole's opening area, and the reflected beam formed after the X-ray beam irradiates the sample exiting through the reflection hole.

[0011] Compared with the prior art, the technical effect of this utility model is as follows: In the reflection detection mode, the incident light of the X-ray beam enters through the incident hole in the quartz glass plate at the first window, while the reflected light exits through the reflection hole in the quartz glass plate. At the same time, the catalytic reaction beam enters the sealed cavity through the plate body of the quartz glass plate and irradiates the sample. This ensures both the high transmittance of the incident and reflected light of the X-rays at the first window and the high transmittance of the catalytic reaction light at the first window, promoting the photocatalytic reaction to reach the activated state, which is beneficial for researchers to accurately study and analyze the photocatalyst. Attached Figure Description

[0012] Figure 1 This is a three-dimensional appearance schematic diagram of the present utility model;

[0013] Figure 2 This is a schematic diagram of the second window;

[0014] Figure 3This is a schematic diagram of the opening on the side of the casing;

[0015] Figure 4 This is a schematic diagram of the sample holder;

[0016] Figure 5 This is a schematic diagram showing the first and second clamping plates separated.

[0017] Figure 6 for Figure 1 Cross-sectional view along the KK axis;

[0018] Figure 7 for Figure 1 NN-direction sectional view;

[0019] Figure 8 for Figure 7 Schematic diagram of the middle section;

[0020] Figure 9 This is a schematic diagram of the second embodiment of the quartz glass plate;

[0021] Figure 10 This is a schematic diagram of the transmission detection mode;

[0022] Figure 11 This is a schematic diagram of the reflection detection mode. Detailed Implementation

[0023] The following is in conjunction with the appendix Figure 1-11 The present invention will be further described in detail below, including related content: Example 1

[0024] A photocatalytic in-situ reaction device includes a box-shaped housing 10, with a sealed cavity 11 inside the housing 10 for accommodating a sample A. First and second windows 20 and 30, respectively, are opened on opposite sides of the housing 10 and communicate with the sealed cavity 11. A second transparent film 31 is placed on the second window 30 to seal its opening. An X-ray beam a enters the sealed cavity 11 through the first window 20 and irradiates the sample A, forming a transmitted beam that exits through the second window 30. A quartz glass plate 21 is placed on the first window 20 to seal its opening. An entrance hole 211 is opened on the quartz glass plate 21 to allow the X-ray beam a to enter the sealed cavity 11 and irradiate the sample A. A first transparent film 22 is placed on the opening of the entrance hole 211 to seal its opening. A catalytic reaction beam b enters the sealed cavity 11 through the plate portion of the quartz glass plate 21 and irradiates the sample A.

[0025] In the above technical solution, combined with Figure 7 and Figure 10As shown, in transmission detection mode, the quartz glass plate 21 has an entrance hole 211 for X-ray beam a to enter the sealed cavity 11 and irradiate sample A. A first light-transmitting film 22 with high transmittance for X-ray beam a is disposed on the aperture area of ​​the entrance hole 211. The catalytic reaction beam b enters the sealed cavity 11 through the plate body of the quartz glass plate 21 and irradiates sample A. In this way, both the high transmittance of X-ray beam a at the first window 20 and the high transmittance of catalytic reaction beam b at the first window 20 are ensured, promoting the photocatalytic reaction to reach the activated state, which is beneficial for researchers to accurately study and analyze the photocatalyst.

[0026] It should be noted that the specific technical principles of X-ray absorption fine structure spectroscopy and how to set up the detection environment for transmission and reflection detection modes are common knowledge in this field and will not be discussed in detail here. As for the detector used to receive the transmitted beam of X-ray beam a in transmission detection mode, it is located on the side where the second window 30 is located.

[0027] Furthermore, the first window 20, the second window 30, and the entrance aperture 211 are arranged coaxially, and the incident direction of the X-ray beam a is consistent with the penetration direction of the first and second windows 20 and 30 and perpendicular to the surface of the sheet sample A, so as to meet the requirements of the transmission detection mode.

[0028] As a preferred embodiment, both the first and second transparent films 22 and 31 are made of polyimide film, which has high transmittance to X-ray beam a, meeting the detection requirements. Alternatively, the first and second transparent films 22 and 31 can also be made of beryllium, which has high transmittance to X-ray beam a.

[0029] Combination Figure 1 , Figure 3 as well as Figure 6 As shown, an opening 12 is provided on the side of the housing 10 adjacent to the side where the first window 20 or the second window 30 is located, for placing sample A into the sealed cavity 11. A cover plate 40 is placed on the opening 12 to seal its opening area. A sample holder 41 is connected to the inner side of the cover plate 40. The sample holder 41 is placed into the sealed cavity 11 through the opening 12, and sample A is placed on the sample holder 41. When placing or replacing sample A, the sample holder 41 can be pulled out from the sealed cavity 11 of the housing 10 through the opening 12 by opening the cover plate 40, thereby facilitating the placement of sample A on the sample holder 41 or the replacement of the sample on the sample holder 41.

[0030] Combination Figure 3-5 as well as Figure 7As shown, in a preferred embodiment, the sample holder 41 includes first and second clamping plates 411 and 412 whose surfaces are abutted against each other. The surfaces of the first and second clamping plates 411 and 412 are perpendicular to the through direction of the first and second windows 20 and 30. One end of the first clamping plate 411 near the cover plate 40 is connected to the inner surface of the cover plate 40. A receiving groove 4111 for accommodating sample A is formed on the side of the first clamping plate 411 facing the second clamping plate 412. A through-hole is formed on the bottom surface of the receiving groove 4111. A first through hole 4112 passes through the first clamping plate 411, and a second through hole 4121 is provided through the plate surface of the second clamping plate 412. The hole area of ​​the second through hole 4121 is arranged opposite to the hole area of ​​the first through hole 4112 and the hole core direction is the same. Sample A is clamped between the plate surface of the second clamping plate 412 and the bottom surface of the receiving groove 4111. The side plate surface of the first clamping plate 411 opposite to the second clamping plate 412 faces the first window 20, and the hole area of ​​the first through hole 4112 is arranged opposite to the hole area of ​​the entrance hole 211.

[0031] In this design, considering that the X-ray beam a needs to pass through the sample holder 41 in the transmission detection mode, first and second through holes 4112 and 4121 are respectively provided on the first and second clamping plates 411 and 412 to allow the X-ray beam a to pass through the sample holder 41. When placing sample A on the sample holder 41, the clamping of sample A by the first and second clamping plates 411 and 412 is first removed, thereby removing the old sample A from the receiving groove 4111 on the first clamping plate 411 so that a new sample A can be placed or replaced in the receiving groove 4111. Then, the sample A is clamped again by the first clamping plate 411 and the second clamping plate 412, thus completing the fixation of sample A on the sample holder 41.

[0032] As a preferred option, such as Figure 5 As shown, the second clamping plate 412 is made of ferromagnetic material, and the first clamping plate 411 is provided with magnetic absorbing sheets 4113 for adsorbing the second clamping plate 412. The first clamping plate 411 uses the magnetic absorbing sheets 4113 to adsorb the second clamping plate 412, so that they are tightly attached to each other, thereby clamping the sample A. Conversely, by overcoming the adsorption force of the magnetic absorbing sheets 4113 on the second clamping plate 412, the second clamping plate 412 can be detached from the first clamping plate 411, and the sample A can be easily placed, removed, or replaced.

[0033] Furthermore, such as Figure 4-6As shown, a limiting groove 4114 is formed on the side of the first clamping plate 411 facing the second clamping plate 412. The depth direction of the limiting groove 4114 is perpendicular to the surface of the first clamping plate 411. The second clamping plate 412 is located in the limiting groove 4114 and matches the outline of the limiting groove 4114. One side wall of the limiting groove 4114 is through in the groove width direction and forms an opening 4115. The side end of the second clamping plate 412 adjacent to the opening 4115 extends to the outside of the limiting groove 4114 through the opening 4115. In this design, the purpose of the limiting groove 4114 is to limit the second clamping plate 412. When the second clamping plate 412 is assembled onto the first clamping plate 411, the limiting groove 4114 provides a positioning reference for the second clamping plate 412, facilitating effective and rapid alignment of the aperture region of the second through hole 4121 on the second clamping plate 412 with the aperture region of the first through hole 4112 on the first clamping plate 411, thereby meeting the transmission requirements of the X-ray beam a. The plate end portion extending from the opening 4115 to the outside of the limiting groove 4114 on the second clamping plate 412 can be moved or pulled to facilitate rapid separation of the second clamping plate 412 from the first clamping plate 411, preventing the second clamping plate 412 from being tightly adhered and difficult to separate.

[0034] As a preferred embodiment, in order to avoid interference between the second clamping plate 412 and the cover plate 40, the opening 4115 is formed on the side wall of the limiting groove 4114 away from the cover plate 40.

[0035] Combination Figure 1 , Figure 2 as well as Figure 6 As shown, the housing 10 is provided with inlet and outlet ports 13 and 14 that connect to the sealed cavity 11. These ports are connected to a vacuum source or a gas source. By connecting the inlet and outlet ports 13 and 14 to a vacuum source or a gas source, the sealing requirements or vacuum environment within the sealed cavity 11 can be guaranteed. Alternatively, different gas sources can be connected to the inlet and outlet ports 13 and 14, allowing the reaction to proceed under different atmospheric gas environments as needed.

[0036] Combination Figure 1 as well as Figure 7-9As shown, in this application, the first window 20 is a stepped hole with a large outer diameter and a small inner diameter. A quartz glass plate 21 is located within the stepped hole and abuts against the stepped surface. An annular first pressure plate 23 is provided on the outer side of the quartz glass plate 21. The inner ring edge of the first pressure plate 23 presses against the outer edge of the quartz glass plate 21, and a first sealing ring 24 is provided between the quartz glass plate 21 and the stepped surface of the first window 20. The first pressure plate 23 and the housing 10 form a detachable fixed fit (such as bolt fixing). By removing the first pressure plate 23 from the housing 10, the quartz glass plate 21 on the first window 20 can be disassembled and replaced. The purpose of the first sealing ring 24 is to ensure the sealing between the quartz glass plate 21 and the stepped hole, thereby ensuring the sealing performance of the first window 20.

[0037] like Figure 7 As shown, the second window 30 is further defined as a stepped hole with a large outer diameter and a small inner diameter. A ring-shaped second pressure plate 32, which forms a detachable fixed fit with the housing 10, is installed within the large-diameter section of the stepped hole. The second pressure plate 32 presses against the second light-transmitting membrane 31. The second light-transmitting membrane 31 is located between the second pressure plate 32 and the stepped surface of the second window 30, and its size is larger than the diameter of the small-diameter section of the second window 30. A second sealing ring 33 is installed between the second light-transmitting membrane 31 and the platform of the stepped hole of the second window 30. By disassembling the second pressure plate 32, the second light-transmitting membrane 31 on the second window 30 can be disassembled and replaced. The purpose of the second sealing ring 33, under the tight pressure of the second pressure plate 32, is to ensure the sealing performance of the second window 30.

[0038] Combination Figure 1 , Figure 9 as well as Figure 11 As shown, in addition to providing a photocatalytic in-situ reaction device that can meet the requirements of transmission detection mode, this application also provides a photocatalytic in-situ reaction device that can meet the requirements of reflection detection mode, the scheme of which is as follows:

[0039] Example 2

[0040] Reference Figure 9 and Figure 11A photocatalytic in-situ reaction device includes a box-shaped housing 10, within which a sealed cavity 11 is provided for accommodating a sheet-like sample A. A first window 20 communicating with the sealed cavity 11 is provided on one side of the housing 10, with the surface of sample A perpendicular to the through direction of the first window 20. A quartz glass plate 21 is placed over the first window 20 to seal its opening. An entrance hole 211 is provided on the quartz glass plate 21 for an X-ray beam a to enter the sealed cavity 11 and irradiate sample A. The incident direction of the X-ray beam a is perpendicular to the surface of sample A. The X-ray beam is arranged in an angle. A first transparent membrane 22 for sealing the aperture area is provided on the aperture area of ​​the entrance aperture 211. The catalytic reaction beam b enters the sealed cavity 11 through the plate body of the quartz glass plate 21 and irradiates the sample A. A reflection aperture 212 is also provided on the quartz glass plate 21. The reflection aperture 212 and the entrance aperture 211 are symmetrically arranged on both sides of the center of the plate surface of the quartz glass plate 21. A third transparent membrane 25 for sealing the aperture area is placed on the reflection aperture 212. The reflected beam formed after the X-ray beam a irradiates the sample A is emitted through the reflection aperture 212.

[0041] In the above technical solution, under the reflection detection mode, the incident light of X-ray beam a enters through the incident hole 211 on the quartz glass plate 21 at the first window 20. The first transparent film 22 achieves high transmittance of the incident light of X-ray beam a, while the reflected light exits through the reflection hole 212 on the quartz glass plate 21. The third transparent film 25 achieves high transmittance of the reflected light of X-ray beam a. At the same time, the catalytic reaction beam b enters the sealed cavity 11 through the plate part of the quartz glass plate 21 and irradiates the sample A. This ensures both the high transmittance of the incident and reflected light of X-ray beam a at the first window 20 and the high transmittance of the catalytic reaction beam b at the first window 20, promoting the photocatalytic reaction to reach the activated state, which is beneficial for researchers to accurately study and analyze the photocatalyst.

[0042] It should be noted that in transmission detection mode, it is only necessary to replace the quartz glass plate 21 on the first window 20 with the quartz glass plate 21 with an entrance aperture 211 and a reflection aperture 212 in this embodiment. Of course, the position of the detector should also be adjusted appropriately to receive the reflected light of the X-ray beam a.

[0043] Furthermore, the first and third transparent films 22 and 25 are both made of polyimide film, which has high transmittance to X-ray beam a, meeting the detection requirements. Here, the first and third transparent films 22 and 25 can also be made of beryllium, which has high transmittance to X-ray beam a.

[0044] Apart from the above, the other structures of the device in the reflection detection mode are the same as those in the transmission detection mode, such as the construction scheme of the sample holder 41 and the sealing scheme of the first window 20, which will not be described again here.

Claims

1. A photocatalytic in-situ reaction device, comprising a box-shaped housing (10), a sealed cavity (11) for accommodating a sample (A) is provided inside the housing (10), and first and second windows (20, 30) with opposite openings and communicating with the sealed cavity (11) are respectively opened on opposite sides of the housing (10), a second light-transmitting membrane (31) for sealing its opening is covered on the second window (30), and an X-ray beam (a) enters the sealed cavity (11) through the first window (20) and the transmitted beam formed after irradiating the sample (A) exits through the second window (30), characterized in that: The first window (20) is covered with a quartz glass plate (21) for sealing its opening. The quartz glass plate (21) has an entrance hole (211) for X-ray beam (a) to enter the sealed cavity (11) and irradiate the sample (A). A first light-transmitting film (22) for sealing the opening is provided on the opening (211). The catalytic reaction beam (b) enters the sealed cavity (11) through the plate part of the quartz glass plate (21) and irradiates the sample (A).

2. The photocatalytic in-situ reaction device according to claim 1, characterized in that: The first window (20), the second window (30), and the entrance aperture (211) are arranged in the same core. The incident direction of the X-ray beam (a) is consistent with the penetration direction of the first and second windows (20, 30) and perpendicular to the surface of the sheet sample (A).

3. The photocatalytic in-situ reaction device according to claim 1, characterized in that: The first and second light-transmitting films (22 and 31) are both made of polyimide film.

4. The photocatalytic in-situ reaction device according to claim 1 or 2, characterized in that: An opening (12) is provided on the side of the housing (10) adjacent to the side where the first window (20) or the second window (30) is located, for the sample (A) to be placed into the sealed cavity (11). A cover plate (40) for sealing the opening (12) is provided on the opening (12). A sample holder (41) is connected to the inner side of the cover plate (40). The sample holder (41) is placed into the sealed cavity (11) through the opening (12) and the sample (A) is placed on the sample holder (41).

5. The photocatalytic in-situ reaction device according to claim 4, characterized in that: The sample holder (41) includes first and second clamping plates (411, 412) with their surfaces touching each other. The surfaces of the first and second clamping plates (411, 412) are perpendicular to the through direction of the first and second windows (20, 30). One end of the first clamping plate (411) near the cover plate (40) is connected to the inner surface of the cover plate (40). A receiving groove (4111) for accommodating the sample (A) is provided on the side of the first clamping plate (411) facing the second clamping plate (412). A through-hole is provided on the bottom surface of the receiving groove (4111) penetrating the first clamping plate (411). 11) A first through hole (4112) is provided, and a second through hole (4121) is provided on the plate surface of the second clamping plate (412). The hole area of ​​the second through hole (4121) is arranged opposite to the hole area of ​​the first through hole (4112) and the hole core direction is the same. The sample (A) is sandwiched between the plate surface of the second clamping plate (412) and the bottom surface of the receiving groove (4111). The side plate surface of the first clamping plate (411) opposite to the second clamping plate (412) faces the first window (20) and the hole area of ​​the first through hole (4112) is arranged opposite to the hole area of ​​the injection hole (211).

6. The photocatalytic in-situ reaction device according to claim 5, characterized in that: The second clamp (412) is made of ferromagnetic material, and the first clamp (411) is provided with a magnetic absorbing sheet (4113) for adsorbing the second clamp (412).

7. The photocatalytic in-situ reaction device according to claim 6, characterized in that: A limiting groove (4114) is provided on the side of the first clamping plate (411) facing the second clamping plate (412). The groove depth direction of the limiting groove (4114) is perpendicular to the plate surface of the first clamping plate (411). The second clamping plate (412) is located in the limiting groove (4114) and matches the outline of the limiting groove (4114). One side of the groove wall of the limiting groove (4114) is through in the groove width direction and forms an opening (4115). The end of the second clamping plate (412) adjacent to the opening (4115) extends through the opening (4115) to the outside of the limiting groove (4114).

8. The photocatalytic in-situ reaction device according to claim 7, characterized in that: An opening (4115) is formed on the side wall of the limiting groove (4114) away from the cover plate (40).

9. The photocatalytic in-situ reaction device according to claim 1, characterized in that: The housing (10) is provided with inlet and outlet ports (13, 14) that connect to the sealed cavity (11), and the inlet and outlet ports (13, 14) are connected to a vacuum source or a gas source.

10. The photocatalytic in-situ reaction device according to claim 1, characterized in that: The first window (20) is a stepped hole with a large outer diameter and a small inner diameter. The quartz glass plate (21) is located inside the stepped hole and abuts against the stepped surface. An annular first pressure plate (23) is provided on the outer side of the quartz glass plate (21). The inner ring edge of the first pressure plate (23) is pressed against the outer edge of the quartz glass plate (21), and a first sealing ring (24) is provided between the quartz glass plate (21) and the stepped surface of the first window (20). The first pressure plate (23) and the housing (10) form a detachable fixed fit.

11. The photocatalytic in-situ reaction device according to claim 1, characterized in that: The second window (30) is a stepped hole with a large outer diameter and a small inner diameter. A ring-shaped second pressure plate (32) is provided in the large diameter section of the stepped hole, which forms a detachable fixed fit with the housing (10). The second pressure plate (32) presses on the second light-transmitting film (31). The second light-transmitting film (31) is located between the second pressure plate (32) and the stepped surface of the second window (30), and the size of the second light-transmitting film (31) is larger than the diameter of the small diameter section of the second window (30). A second sealing ring (33) is provided between the second light-transmitting film (31) and the platform of the stepped hole of the second window (30).

12. A photocatalytic in-situ reaction device, comprising a box-shaped housing (10), wherein a sealed cavity (11) for accommodating a sheet-like sample (A) is provided inside the housing (10), and a first window (20) communicating with the sealed cavity (11) is provided on one side of the housing (10), and the surface of the sample (A) is perpendicular to the penetrating direction of the first window (20), characterized in that: A quartz glass plate (21) for sealing the opening area is placed on the first window (20). The quartz glass plate (21) has an entrance hole (211) for the X-ray beam (a) to enter the sealed cavity (11) and irradiate the sample (A). The incident direction of the X-ray beam (a) is arranged at an angle to the surface of the sample (A). A first light-transmitting membrane (22) for sealing the opening area is provided on the opening area of ​​the entrance hole (211). The catalytic reaction beam (b) passes through the quartz glass plate. The plate part of (21) is injected into the sealed cavity (11) and irradiates the sample (A). A reflection hole (212) is also provided on the quartz glass plate (21). The reflection hole (212) and the entrance hole (211) are symmetrically arranged on both sides of the center of the quartz glass plate (21). A third light-transmitting film (25) for sealing its aperture area is placed on the reflection hole (212). The reflected beam formed after the X-ray beam (a) irradiates the sample (A) is emitted through the reflection hole (212).

13. The photocatalytic in-situ reaction device according to claim 12, characterized in that: The first and third light-transmitting films (22 and 25) are both made of polyimide film.

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