Device suitable for testing photocatalytic conversion efficiency

Abstract

The utility model provides a device suitable for testing photocatalytic conversion efficiency, and relates to the technical field of photocatalytic conversion efficiency. On the basis of the switch assembly, the number of the light-emitting elements in the light-emitting state is adjusted by controlling the light-emitting states of the LED chips in the different light-emitting elements, and the purpose that the light intensity is adjustable is achieved; due to the fact that the wavelengths of the monochromatic light emitted by any two LED chips in the multiple LED chips are different, the purpose of switching the monochromatic light is achieved by controlling the LED chips in the light-emitting state in the multiple LED chips.

Description

Technical Field

[0001] This application relates to the field of photocatalytic conversion efficiency technology, and in particular to an apparatus suitable for testing photocatalytic conversion efficiency. Background Technology

[0002] Photocatalysis, including water splitting for hydrogen production and carbon dioxide reduction, is considered one of the optimal approaches to solving the problems of fossil fuel depletion and environmental pollution. Apparent quantum efficiency (AQY), the ratio of electrons transferred to incident photons during a photocatalytic reaction, is a crucial parameter for evaluating the light energy conversion efficiency of photocatalytic materials. It requires testing of photocatalytic materials under at least five different monochromatic light sources.

[0003] However, in current laboratory photocatalysis experiments, most use xenon lamps that simulate the full spectrum of sunlight as the light source. When AQY testing is required, a monochromatic light filter is added to the xenon lamp's output port to form the desired monochromatic light. However, this operation filters out more than 70% of the xenon lamp's light energy, resulting in a significant reduction in the xenon lamp's output light intensity, making it difficult to excite some low-activity photocatalytic materials and wasting light energy. At the same time, different monochromatic lights require different filters, making the operation cumbersome and increasing costs.

[0004] Therefore, when testing AQY photocatalytic materials, designing a device with adjustable light intensity and the ability to autonomously switch between monochromatic light is an urgent technical problem to be solved. Utility Model Content

[0005] In view of the above problems, this application provides a device suitable for testing photocatalytic conversion efficiency. This device is adjustable in light intensity and can autonomously switch to monochromatic light. The specific solution is as follows:

[0006] The first aspect of this application provides an apparatus suitable for testing photocatalytic conversion efficiency, the apparatus comprising:

[0007] Light-emitting components and switching components;

[0008] The light-emitting component includes a carrier disk and a plurality of light-emitting elements located on the carrier disk. Each light-emitting element is encapsulated with a plurality of LED chips, and any two of the plurality of LED chips emit monochromatic light with different wavelengths.

[0009] The switching assembly is electrically connected to the LED chip and is used to control the light-emitting state of the LED chip.

[0010] Preferably, in the above-mentioned apparatus for testing photocatalytic conversion efficiency, each of the light-emitting elements is packaged with at least five LED chips.

[0011] Preferably, in the above-mentioned apparatus suitable for testing photocatalytic conversion efficiency, the at least five LED chips include the first to sixth LED chips;

[0012] The first LED chip is used to emit monochromatic light with a wavelength of 425nm;

[0013] The second LED chip is used to emit monochromatic light with a wavelength of 450nm;

[0014] The third LED chip is used to emit monochromatic light with a wavelength of 475nm;

[0015] The fourth LED chip is used to emit monochromatic light with a wavelength of 525nm;

[0016] The fifth LED chip is used to emit monochromatic light with a wavelength of 575nm;

[0017] The sixth LED chip is used to emit monochromatic light with a wavelength of 625nm.

[0018] Preferably, in the above-mentioned device suitable for testing photocatalytic conversion efficiency, the carrier disk includes N mutually supporting annular mounting areas, where N≥2 and N is a positive integer;

[0019] Wherein, the i-th ring-shaped installation area is located inside the (i+1)-th ring-shaped installation area, N>i≥1, and i is a positive integer;

[0020] The light-emitting element is installed in each of the aforementioned annular mounting areas.

[0021] Preferably, in the above-mentioned apparatus suitable for testing photocatalytic conversion efficiency, when N=3,

[0022] Six of the aforementioned light-emitting elements are installed within the first annular mounting area;

[0023] Thirteen of the aforementioned light-emitting elements are installed within the second annular mounting area;

[0024] Twenty of the aforementioned light-emitting elements are installed in the third annular mounting area.

[0025] Preferably, in the above-mentioned apparatus suitable for testing photocatalytic conversion efficiency,

[0026] The light-emitting elements installed in each of the aforementioned annular mounting areas are arranged in a ring at equal intervals within their respective annular mounting areas.

[0027] Preferably, in the above-mentioned apparatus suitable for testing photocatalytic conversion efficiency, the apparatus further includes: a transformer;

[0028] The switching assembly is electrically connected to the LED chip via the transformer.

[0029] Preferably, in the above-mentioned apparatus suitable for testing photocatalytic conversion efficiency, the apparatus further includes: a heat dissipation component;

[0030] The light-emitting component is mounted on the heat dissipation component.

[0031] Preferably, in the above-mentioned apparatus suitable for testing photocatalytic conversion efficiency, the heat dissipation component includes: a heat sink and a heat pipe.

[0032] Preferably, in the above-mentioned apparatus for testing photocatalytic conversion efficiency, the heat dissipation component further includes a fan.

[0033] Preferably, in the above-mentioned apparatus for testing photocatalytic conversion efficiency, the apparatus further includes a lifting platform.

[0034] By means of the above technical solution, this application provides a device suitable for testing photocatalytic conversion efficiency. Based on the switching component, the device controls the light emission state of LED chips in different light-emitting elements, thereby adjusting the number of light-emitting elements in the light emission state to achieve the purpose of adjustable light intensity. Since any two LED chips in the multiple LED chips emit monochromatic light with different wavelengths, the device controls the LED chips in the light emission state to achieve the purpose of monochromatic light switching. Attached Figure Description

[0035] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. Throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the originals and elements are not necessarily drawn to scale.

[0036] Figure 1 A schematic diagram of a device for testing photocatalytic conversion efficiency provided in an embodiment of this utility model;

[0037] Figure 2 This is a schematic diagram of the structure of a light-emitting component provided in an embodiment of the present utility model;

[0038] Figure 3 This is a schematic diagram of the structure of a light-emitting element provided in an embodiment of the present utility model;

[0039] Figure 4 This is a schematic diagram of the structure of a switch assembly provided in an embodiment of the present utility model. Detailed Implementation

[0040] The embodiments of this application are described below with reference to the accompanying drawings. The terminology used in the implementation section of this application is only for explaining specific embodiments and is not intended to limit the application. Those skilled in the art will recognize that, with technological advancements and the emergence of new scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.

[0041] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] It should be noted that the directional terms appearing in this utility model are based on the relative positional relationships shown in the accompanying drawings and should not be taken as absolute limitations on this application.

[0043] refer to Figure 1 , Figure 1 A schematic diagram of a device for testing photocatalytic conversion efficiency provided in this embodiment of the present invention is shown below. Figure 2 , Figure 2 This is a schematic diagram of the structure of a light-emitting component provided in an embodiment of the present utility model, with reference to... Figure 3 , Figure 3 This is a schematic diagram of the structure of a light-emitting element provided in an embodiment of the present utility model, with reference to... Figure 4 , Figure 4 This is a schematic diagram of a switching assembly provided in an embodiment of the present invention. The device provided in this embodiment for testing photocatalytic conversion efficiency includes: a light-emitting component 11 and a switching assembly 12.

[0044] The light-emitting component 11 includes a carrier disk 111 and a plurality of light-emitting elements 112 located on the carrier disk 111. Each light-emitting element 112 is encapsulated with a plurality of LED chips 113, and any two of the plurality of LED chips 113 emit monochromatic light with different wavelengths. Optionally, such as Figure 3 As shown, each of the light-emitting elements 112 is packaged with at least five LED chips 113.

[0045] The switch assembly 12 is electrically connected to the LED chip 113 and is used to control the light-emitting state of the LED chip 113.

[0046] Specifically, in this embodiment of the invention, the switching component 12 controls the light-emitting state of the LED chips 113 in different light-emitting elements 112, thereby adjusting the number of light-emitting elements 112 in the light-emitting state and achieving the purpose of adjustable light intensity. Since the wavelengths of the monochromatic light emitted by any two LED chips 113 in the plurality of LED chips 113 are different, the purpose of switching monochromatic light is achieved by controlling the LED chips 113 in the light-emitting state in the plurality of LED chips 113.

[0047] In an optional embodiment of this utility model, such as Figure 2 As shown, the carrier plate 111 includes N interconnected annular mounting areas, where N ≥ 2 and N is a positive integer.

[0048] The i-th ring-shaped installation area is located inside the (i+1)-th ring-shaped installation area, N > i ≥ 1, and i is a positive integer.

[0049] The light-emitting element 112 is installed in each of the aforementioned annular mounting areas.

[0050] The light-emitting elements 112 installed in each of the aforementioned annular mounting areas are arranged in a ring at equal intervals within their respective annular mounting areas. This design can be understood as arranging the light-emitting elements 112 relatively evenly on the carrier plate 111.

[0051] In this embodiment of the present invention, taking N=3 as an example, when N=3, 6 light-emitting elements 112 can be installed in the first annular mounting area; 13 light-emitting elements 112 can be installed in the second annular mounting area; and 20 light-emitting elements 112 can be installed in the third annular mounting area.

[0052] like Figure 3 The at least five LED chips 113 may include a first to a sixth LED chip; the first LED chip is used to emit monochromatic light with a wavelength of 425nm; the second LED chip is used to emit monochromatic light with a wavelength of 450nm; the third LED chip is used to emit monochromatic light with a wavelength of 475nm; the fourth LED chip is used to emit monochromatic light with a wavelength of 525nm; the fifth LED chip is used to emit monochromatic light with a wavelength of 575nm; and the sixth LED chip is used to emit monochromatic light with a wavelength of 625nm.

[0053] like Figure 4 As shown, the switch assembly 12 includes, but is not limited to, two sets of switches. One set of switches is used to control the light-emitting state of the light-emitting element 112 to adjust the light intensity; the other set of switches is used to control the light-emitting state of at least five LED chips 113 to switch monochromatic light.

[0054] In one possible implementation, when switch I in switch assembly 12 is open, the light-emitting element 112 in the first annular mounting area is in a light-emitting state, and when switch I is closed, the light-emitting element 112 in the first annular mounting area is in a non-light-emitting state; when switch M in switch assembly 12 is open, the light-emitting element 112 in the second annular mounting area is in a light-emitting state, and when switch M is closed, the light-emitting element 112 in the second annular mounting area is in a non-light-emitting state; when switch O in switch assembly 12 is open, the light-emitting element 112 in the third annular mounting area is in a light-emitting state, and when switch O is closed, the light-emitting element 112 in the third annular mounting area is in a non-light-emitting state. When switch K1 in switch assembly 12 is open, the first LED chip emits monochromatic light with a wavelength of 425nm; when switch K1 is closed, the first LED chip is in a non-emitting state. When switch K2 in switch assembly 12 is open, the second LED chip emits monochromatic light with a wavelength of 450nm; when switch K2 is closed, the second LED chip is in a non-emitting state. When switch K3 in switch assembly 12 is open, the third LED chip emits monochromatic light with a wavelength of 475nm; when switch K3 is closed, the third LED chip is in a non-emitting state. When switch K4 in switch assembly 12 is open, the fourth LED chip emits monochromatic light with a wavelength of 525nm; when switch K4 is closed, the fourth LED chip is in a non-emitting state. When switch K5 in switch assembly 12 is open, the fifth LED chip emits monochromatic light with a wavelength of 575nm; when switch K5 is closed, the fifth LED chip is in a non-emitting state. When switch K6 in switch assembly 12 is open, the sixth LED chip emits monochromatic light with a wavelength of 625nm; when switch K6 is closed, the sixth LED chip is in a non-emitting state.

[0055] For example, when testing the AQY of a highly active photocatalytic material, the apparatus provided in this embodiment of the present invention only requires turning on the light-emitting element 112 in one of the three annular mounting areas. In other words, one of the switches I, M, and O is in the open state.

[0056] For example, when testing the low-activity photocatalytic material AQY using the apparatus provided in this embodiment of the present invention, the light-emitting elements 112 in the three annular mounting areas need to be turned on. In other words, switches I, M, and O are all in the on state.

[0057] For example, when testing the AQY of a moderately active photocatalytic material using the apparatus provided in this embodiment of the present invention, the light-emitting elements 112 in any two of the three annular mounting regions need to be turned on. In other words, any two of switches I, M, and O must be in the open state.

[0058] For example, when testing the AQY of photocatalytic materials under different monochromatic light using the device for testing photocatalytic conversion efficiency provided in this embodiment of the present invention, only switching switches K1-K6 is required to achieve the purpose of adjusting the emission wavelength, in other words, to achieve the purpose of monochromatic light switching.

[0059] Furthermore, the technical effects achievable by the technical solution of this application will be further explained below by comparison.

[0060] Comparative Example: In a photocatalytic water splitting hydrogen production system using Ir(ppy)2(bpy) as a photosensitizer, K2PtCl4 as a catalyst, triethylamine as a sacrificial agent, DMF and water as solvents, and a xenon lamp combined with a 450nm monochromatic light filter as the light source, no H2 precipitation was detected after 5 hours of illumination, and the photosensitizer AQY of Ir(ppy)2(bpy) could not be calculated.

[0061] Example 1: In a photocatalytic water splitting hydrogen production system using Ir(ppy)2(bpy) as a photosensitizer, K2PtCl4 as a catalyst, triethylamine as a sacrificial agent, DMF and water as solvents, with switches I, M, O and K2 all in the open state, 0.1 mL of H2 was detected after 5 hours of illumination. The AQY of Ir(ppy)2(bpy) at 450 nm was calculated to be 0.01%.

[0062] Example 2: In a photocatalytic water splitting hydrogen production system with C3N4 as photosensitizer, K2PtCl4 as catalyst, triethylamine as sacrificial agent, and water as solvent, and with switch O and switch K4 in the open state, after 5 hours of illumination, 20 mL of H2 was detected, and the AQY of C3N4 at 525 nm was calculated to be 2%.

[0063] In summary, the device provided by this invention for testing photocatalytic conversion efficiency can flexibly switch between light intensity and monochromatic light wavelength. Compared with traditional xenon lamps, it can test a wider range of materials, is simple to operate, and has less light energy loss. In other words, the technical solution of this invention uses LED chip 113 as the light source, which can flexibly switch between different wavelengths of monochromatic light; and the LED chip 113 is small in size, and by controlling the switching of different areas, it can meet the needs of different light intensities, with a large light intensity coverage, meeting the AQY testing requirements of different photocatalytically active materials; furthermore, the LED chip 113, as a cold light source, can effectively reduce heat loss, save resources, and has a long service life, thus saving costs.

[0064] In an optional embodiment of this utility model, such as Figure 1As shown, the device for testing photocatalytic conversion efficiency provided in this embodiment of the present invention further includes: a transformer 13 and a heat dissipation component 14.

[0065] The switching assembly 12 is electrically connected to the LED chip 113 via the transformer 13. The light-emitting assembly 11 is mounted on the heat dissipation assembly 14.

[0066] Specifically, in this embodiment of the invention, a transformer 13 is provided to obtain the operating voltage required for the device for testing photocatalytic conversion efficiency, ensuring stable operation of the device. A heat dissipation assembly 14 is provided to ensure that the heat generated by the light-emitting component 11 can be dissipated in a timely manner, thereby improving the lifespan of the light-emitting component 11. The heat dissipation assembly 14 includes, but is not limited to, heat sinks and heat pipes. In some other feasible solutions, the heat dissipation assembly 14 may also include a fan.

[0067] In an optional embodiment of this utility model, such as Figure 1 As shown, the device for testing photocatalytic conversion efficiency provided in this embodiment of the present invention further includes a lifting platform 15, thereby realizing the adjustment of the spatial position of the light-emitting component 11, so that it can be applied to more testing scenarios.

[0068] The above provides a detailed description of the device for testing photocatalytic conversion efficiency provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

[0069] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0070] It should also be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that elements inherent to a process, method, article, or apparatus that comprises a list of elements, or elements inherent to such processes, methods, articles, or apparatus, are also included. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0071] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device suitable for testing photocatalytic conversion efficiency, characterized in that, The device for testing photocatalytic conversion efficiency includes: a light-emitting component and a switching component; The light-emitting component includes a carrier disk and a plurality of light-emitting elements located on the carrier disk. Each light-emitting element is encapsulated with a plurality of LED chips, and any two of the plurality of LED chips emit monochromatic light with different wavelengths. The switching assembly is electrically connected to the LED chip and is used to control the light-emitting state of the LED chip.

2. The apparatus for testing photocatalytic conversion efficiency according to claim 1, characterized in that, Each of the light-emitting element packages is provided with at least five LED chips.

3. The apparatus for testing photocatalytic conversion efficiency according to claim 2, characterized in that, The at least five LED chips include the first to sixth LED chips; The first LED chip is used to emit monochromatic light with a wavelength of 425nm; The second LED chip is used to emit monochromatic light with a wavelength of 450nm; The third LED chip is used to emit monochromatic light with a wavelength of 475nm; The fourth LED chip is used to emit monochromatic light with a wavelength of 525nm; The fifth LED chip is used to emit monochromatic light with a wavelength of 575nm; The sixth LED chip is used to emit monochromatic light with a wavelength of 625nm.

4. The apparatus for testing photocatalytic conversion efficiency according to claim 1, characterized in that, The support plate includes N interconnected annular mounting areas, where N≥2 and N is a positive integer; Wherein, the i-th ring-shaped installation area is located inside the (i+1)-th ring-shaped installation area, N>i≥1, and i is a positive integer; The light-emitting element is installed in each of the aforementioned annular mounting areas.

5. The apparatus for testing photocatalytic conversion efficiency according to claim 4, characterized in that, When N=3 Six of the aforementioned light-emitting elements are installed within the first annular mounting area; Thirteen of the aforementioned light-emitting elements are installed within the second annular mounting area; Twenty of the aforementioned light-emitting elements are installed in the third annular mounting area.

6. The apparatus for testing photocatalytic conversion efficiency according to claim 4, characterized in that, The light-emitting elements installed in each of the aforementioned annular mounting areas are arranged in a ring at equal intervals within their respective annular mounting areas.

7. The apparatus for testing photocatalytic conversion efficiency according to any one of claims 1-6, characterized in that, The device suitable for testing photocatalytic conversion efficiency also includes: a transformer; The switching assembly is electrically connected to the LED chip via the transformer.

8. The apparatus for testing photocatalytic conversion efficiency according to any one of claims 1-6, characterized in that, The device for testing photocatalytic conversion efficiency also includes: a heat dissipation component; The light-emitting component is mounted on the heat dissipation component.

9. The apparatus for testing photocatalytic conversion efficiency according to claim 8, characterized in that, The heat dissipation component includes: heat sink and heat pipe.

10. The apparatus for testing photocatalytic conversion efficiency according to claim 9, characterized in that, The heat dissipation component also includes a fan.

11. The apparatus for testing photocatalytic conversion efficiency according to any one of claims 1-6, characterized in that, The device for testing photocatalytic conversion efficiency also includes a lifting platform.

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