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ZnO/ZnS/CdS composite of porous core-shell structure and preparation method thereof

A composite material and shell structure technology, which is applied in catalyst activation/preparation, hydrogen/synthesis gas production, chemical instruments and methods, etc., can solve the problems of narrow light absorption range, low quantum efficiency, and low hydrogen production performance, and achieve the goal of preparing The method is simple, the quantum efficiency is improved, and the effect of infiltration is beneficial

Inactive Publication Date: 2016-11-16
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing modified ZnO catalysts have problems such as narrow light absorption range and low quantum efficiency, resulting in low hydrogen production performance.

Method used

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  • ZnO/ZnS/CdS composite of porous core-shell structure and preparation method thereof
  • ZnO/ZnS/CdS composite of porous core-shell structure and preparation method thereof
  • ZnO/ZnS/CdS composite of porous core-shell structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Prepare the ZnO / ZnS / CdS composite material of porous core-shell structure, the steps are as follows:

[0030] 1) Preparation of porous ZnO microspheres: Add 1g of zinc acetate into 50mL of diethylene glycol, mix and stir evenly to obtain solution I, then put the obtained solution I into a reaction kettle, seal it and heat it to 160°C for constant temperature crystallization Reaction, after 24 hours of reaction, perform suction filtration, washing, and drying to obtain porous ZnO microspheres;

[0031] 2) Preparation of ZnO / ZnS porous microspheres: add 0.2 g of ZnO porous microspheres obtained in step 1) and 0.4 g of thioacetamide into 50 mL of water, stir and mix well to obtain suspension II, and then Liquid II was put into the reaction kettle, sealed and heated to 90°C for ion exchange reaction. After 7 hours, suction filtration, washing and drying were performed to obtain ZnO / ZnS porous microspheres;

[0032] 3) Preparation of ZnO / ZnS / CdS composite material with poro...

Embodiment 2

[0036] Prepare the ZnO / ZnS / CdS composite material of porous core-shell structure, the steps are as follows:

[0037] 1) Preparation of porous ZnO microspheres: Add 1.2g of zinc acetate into 50mL of diethylene glycol, mix and stir evenly (stirring temperature is 25°C, stirring speed is 700r / min), to obtain solution I, and then put the obtained solution I into Put it into a reaction kettle, seal it and heat it to 180°C for a constant temperature crystallization reaction. After reacting for 24 hours, perform suction filtration, washing, and drying to obtain porous ZnO microspheres;

[0038]2) Preparation of ZnO / ZnS porous microspheres: Add 0.2 g of ZnO porous microspheres obtained in step 1) and 0.4 g of thioacetamide into 50 mL of water, stir well and mix evenly (stirring temperature is 25 ° C, stirring rate is 700 r / min) to obtain the suspension II, then put the suspension II into the reaction kettle, seal it and heat it to 100°C for ion exchange reaction, after 6h, carry out ...

Embodiment 3

[0042] Prepare the ZnO / ZnS / CdS composite material of porous core-shell structure, the steps are as follows:

[0043] 1) Preparation of porous ZnO microspheres: Add 1.5g of zinc acetate into 50mL of diethylene glycol, mix and stir evenly (stirring temperature is 25°C, stirring rate is 700r / min) to obtain solution I, and then put the obtained solution I into Put it into a reaction kettle, seal it and heat it to 150°C for a constant temperature crystallization reaction. After reacting for 7 hours, perform suction filtration, washing, and drying to obtain porous ZnO microspheres;

[0044] 2) Preparation of ZnO / ZnS porous microspheres: add 0.2 g of the ZnO porous microspheres obtained in step 1) and 0.2 g of thioacetamide into 50 mL of water, stir well and mix evenly (stirring temperature is 25 ° C, stirring rate is 700 r / min) to obtain the suspension II, then put the suspension II into the reaction kettle, seal it and heat it to 90°C for ion exchange reaction, after 7h, carry out...

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Abstract

The invention relates to a ZnO / ZnS / CdS composite of a porous core-shell structure and a preparation method thereof. The composite is prepared in the manner that porous ZnO microspheres are treated with an ion exchange method to obtain a ZnS shell and a CdS shell in sequence. The preparation method of the composite includes the steps that 1, zinc acetate is added into polyhydric alcohol to obtain a solution I, and then the solution I is put into a reaction kettle for a constant-temperature crystallization reaction to obtain the porous ZnO microspheres; 2, the porous ZnO microspheres and thioacetamide are added into water to obtain suspension II, and then the suspension II is put into the reaction kettle for an ion exchange reaction to obtain ZnO / ZnS microspheres; 3, the ZnO / ZnS microspheres and cadmium nitrate are added into water together to obtain mixed suspension III, and then the suspension III is put into the reaction kettle for an ion exchange reaction to obtain the ZnO / ZnS / CdS composite of the porous core-shell structure.

Description

technical field [0001] The invention belongs to the technical field of inorganic materials, and in particular relates to a ZnO / ZnS / CdS composite material with a porous core-shell structure and a preparation method thereof. Background technique [0002] With the development of society, energy and environmental issues have become increasingly serious. The preparation of new clean energy to replace non-renewable energy has become a hot spot of attention. Among them, photocatalytic hydrogen production has the advantages of non-toxicity, cheap and easy-to-obtain materials, and little secondary pollution. It is a very promising technology. [0003] As a photocatalytic material, ZnO is stable, non-toxic and easy to obtain raw materials. However, ZnO itself has the problems of narrow photoresponse range and low quantum efficiency, which limits its practical application. Recently, some researchers have prepared ZnO samples with different morphologies and modified them to improve the...

Claims

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Application Information

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IPC IPC(8): B01J27/04C01B3/02
CPCC01B3/02B01J27/04B01J37/30C01B2203/1076B01J35/396B01J35/39
Inventor 王洪恩张润霖谢纪伟王文聪蔡祎
Owner WUHAN UNIV OF TECH
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