Efficient photocatalytic hydrogen production catalytic system and preparation method thereof

A catalytic system and photocatalytic technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, etc., to achieve the effects of good stability, easy preparation, and simple preparation

Pending Publication Date: 2021-06-01
SHANGHAI INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Under the irradiation of light with lower intensity, it can also show good catalytic performance, but the above-mentioned performance is not examined in the comparative patent

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  • Efficient photocatalytic hydrogen production catalytic system and preparation method thereof
  • Efficient photocatalytic hydrogen production catalytic system and preparation method thereof
  • Efficient photocatalytic hydrogen production catalytic system and preparation method thereof

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preparation example Construction

[0033] A preparation method of the above-mentioned high-efficiency photocatalytic hydrogen production catalytic system, the preparation method specifically includes the following steps:

[0034] (1) Take zinc salt, water and cetyltrimethylammonium bromide to make solution A, take tungsten salt and water to make solution B, then add solution B dropwise to solution A and stir for 1.5 to 2.5 hours to obtain mixture, and then transfer the resulting mixture to a hydrothermal kettle, heat it to 160-200°C in an airtight manner, and keep it warm for 18-22 hours. After the reaction is completed, ZnWO is obtained by post-processing 4 The post-treatment of nanosheets is as follows: centrifuge and filter the reaction system after the hydrothermal reaction, then wash the collected precipitate with water, and then dry it at 60-100°C for 22-26 hours, wherein the zinc salt is Zinc nitrate hexahydrate, tungsten salt is sodium tungstate; in solution A, the concentration of zinc salt is 0.1~0.6m...

Embodiment 1

[0039] A high-efficiency photocatalytic hydrogen production catalytic system comprising Eosin Y photosensitizer dye as a photosensitizer, CuO nanoparticles as a cocatalyst, and ZnWO as a main catalyst 4 Nanosheets, Eosin Y photosensitizer dye and CuO nanoparticles were all loaded on ZnWO 4 on the nanosheet. The catalytic system is prepared by the following steps:

[0040] (1) Weigh 0.59g of zinc nitrate hexahydrate and transfer it to a beaker, then add 20mL of deionized water, stir and dissolve to obtain a concentration of 0.1mol L -1 solution of zinc nitrate.

[0041] (2) After slowly adding 0.072g of cetyltrimethylammonium bromide to the above-mentioned zinc nitrate solution, stir fully until the cetyltrimethylammonium bromide is completely dissolved, and this solution is recorded as A solution (A solution In, the concentration of zinc nitrate is 0.1molL -1 , the concentration of cetyltrimethylammonium bromide is 0.01mol L -1 ).

[0042] (3) Weigh 0.66g of sodium tungs...

Embodiment 2

[0051] A high-efficiency photocatalytic hydrogen production catalytic system comprising Eosin Y photosensitizer dye as a photosensitizer, CuO nanoparticles as a cocatalyst, and ZnWO as a main catalyst 4 Nanosheets, Eosin Y photosensitizer dye and CuO nanoparticles were all loaded on ZnWO 4 on the nanosheet. The catalytic system is prepared by the following steps:

[0052] (1) Weigh 3.57g of zinc nitrate hexahydrate and transfer it to a beaker, then add 20mL of deionized water, stir and dissolve to obtain a concentration of 0.6mol L -1 solution of zinc nitrate.

[0053] (2) After slowly adding 0.728g of cetyltrimethylammonium bromide to the above-mentioned zinc nitrate, stir fully until the cetyltrimethylammonium bromide is completely dissolved, and this solution is recorded as A solution (in A solution , the concentration of zinc nitrate is 0.6mol L -1 , the concentration of cetyltrimethylammonium bromide is 0.1molL -1 ).

[0054] (3) Weigh 3.96g of sodium tungstate and ...

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Abstract

The invention relates to an efficient photocatalytic hydrogen production catalytic system and preparation, a catalyst comprises an eosin Y photosensitizer dye as a photosensitizer and ZnWO4 nanosheets loaded with CuO nanoparticles, and the ZnWO4 nanosheet is used as a carrier. The preparation method comprises the following steps: (1) taking zinc salt, water and hexadecyl trimethyl ammonium bromide to prepare a solution A, taking tungsten salt and water to prepare a solution B, mixing the solution A and the solution B, carrying out a hydrothermal reaction, and carrying out post-treatment to obtain the ZnWO4 nanosheets; (2) dispersing the ZnWO4 nanosheets in a solvent to obtain a dispersion liquid, adding a copper salt, heating, adjusting the pH value, carrying out a reaction, and carrying out post-treatment to obtain the ZnWO4 nanosheets loaded with CuO nanoparticles; and (3) dispersing the ZnWO4 nanosheets loaded with CuO nanoparticles in water to form a dispersion system, adding an eosin Y photosensitizer dye, stirring in a dark place, and carrying out post-treatment to obtain the catalyst. Compared with the prior art, the catalyst disclosed by the invention has good stability and very high hydrogen production activity when the light intensity changes, and is relatively weak in sensitivity to the light intensity.

Description

technical field [0001] The invention belongs to the field of catalysts, and in particular relates to a high-efficiency photocatalytic hydrogen production catalytic system and a preparation method thereof. Background technique [0002] Solar photocatalytic hydrogen production is considered to be an effective way to solve environmental and energy crisis problems. So far, the research on semiconductor photocatalysts has been very in-depth, and many photocatalysts with high efficiency, environmental protection and economy have been obtained. As we all know, the intensity of sunlight is very unstable due to the influence of time, weather and other factors. In a day or throughout the year, the intensity of sunlight fluctuates greatly and changes quickly. Therefore, in order to achieve large-scale application of photocatalytic hydrogen production technology, it is necessary to produce hydrogen efficiently and stably under the condition of variable intensity light irradiation. The...

Claims

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Application Information

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IPC IPC(8): B01J31/02C01B3/04
CPCB01J31/0214C01B3/042C01B2203/0277C01B2203/1094B01J35/39Y02E60/36
Inventor 康诗钊鲍晓洛郑德温李向清秦利霞
Owner SHANGHAI INSTITUTE OF TECHNOLOGY
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