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A kind of metal/nonmetal doped zinc copper sulfide photocatalyst and preparation method

A technology of zinc-copper sulfide and zinc sulfide, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of application limitation, low catalytic efficiency, easy compounding, etc.

Active Publication Date: 2021-09-14
重庆积众吉昌新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this invention is that photogenerated electrons and hole pairs are easy to recombine, resulting in low catalytic efficiency and limited applications.
[0006] To sum up, among the catalysts used in the fields of photocatalytic sewage treatment and photolysis of water to produce hydrogen in the prior art, the zinc-copper sulfide photocatalyst has a wide band gap, which leads to low utilization of visible light, and photogenerated electrons and holes pair Easy recombination leads to defects such as low catalytic efficiency. Therefore, it is of great significance to develop a zinc-copper sulfide photocatalyst with high utilization rate of visible light and high catalytic efficiency.

Method used

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  • A kind of metal/nonmetal doped zinc copper sulfide photocatalyst and preparation method

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Effect test

Embodiment 1

[0032] (1) Add copper salt and zinc salt to the alcohol / water solution, then add lanthanum nitrate and cerium nitrate, stir evenly, adjust the pH value to 4.5, and make a mixed solution A; the copper salt is copper chloride; the zinc salt is chloride Zinc; the sulfur source is sodium sulfide; the alcohol is ethylene glycol; in mixed solution A, 13 parts by weight of copper salt, 13 parts by weight of zinc salt, 24 parts by weight of alcohol, 44 parts by weight of water, 3 parts by weight of lanthanum nitrate, and 3 parts by weight of cerium nitrate parts by weight;

[0033] (2) adding the sulfur source into the alcohol / water solution, stirring evenly, to obtain a solution B; in the solution B, 24 parts by weight of the sulfur source, 34 parts by weight of alcohol, and 42 parts by weight of water;

[0034] (3) Slowly drop solution A into solution B under stirring, continue to stir for 130 minutes, filter, wash, and vacuum-dry to prepare lanthanum- and cerium-doped zinc-copper s...

Embodiment 2

[0037] (1) Add copper salt and zinc salt to the alcohol / water solution, then add lanthanum nitrate and cerium nitrate, stir evenly, adjust the pH value to 5, and prepare mixed solution A; the copper salt is copper sulfate; the zinc salt is zinc sulfate; The sulfur source is thioacetamide; the alcohol is glycerol; in the mixed solution A, 11 parts by weight of copper salt, 12 parts by weight of zinc salt, 23 parts by weight of alcohol, 48 parts by weight of water, 3 parts by weight of lanthanum nitrate, and 3 parts by weight of cerium nitrate parts by weight;

[0038] (2) adding the sulfur source into the alcohol / water solution, stirring evenly, to obtain a solution B; in the solution B, 23 parts by weight of the sulfur source, 33 parts by weight of alcohol, and 44 parts by weight of water;

[0039] (3) Slowly drop solution A into solution B under stirring, continue to stir for 130 minutes, filter, wash, and vacuum-dry to prepare lanthanum- and cerium-doped zinc-copper sulfide ...

Embodiment 3

[0042] (1) Add copper salt and zinc salt to the alcohol / water solution, then add lanthanum nitrate and cerium nitrate, stir evenly, adjust the pH value to 5, and prepare mixed solution A; the copper salt is copper acetate; the zinc salt is zinc acetate; The sulfur source is thiourea; the alcohol is n-butanol; in mixed solution A, 14 parts by weight of copper salt, 14 parts by weight of zinc salt, 27 parts by weight of alcohol, 37 parts by weight of water, 4 parts by weight of lanthanum nitrate, and 4 parts by weight of cerium nitrate ;

[0043] (2) adding the sulfur source into the alcohol / water solution, and stirring evenly, to obtain a solution B; in the solution B, 28 parts by weight of the sulfur source, 38 parts by weight of alcohol, and 34 parts by weight of water;

[0044] (3) Slowly drop solution A into solution B under stirring, continue to stir for 140 minutes, filter, wash, and vacuum-dry to prepare lanthanum and cerium-doped zinc copper sulfide nanoparticles; the r...

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Abstract

The invention belongs to the technical field of photocatalysts, and provides a metal / nonmetal-doped zinc-copper sulfide photocatalyst and a preparation method. This method prepares zinc-copper sulfide photocatalyst at a lower temperature, and in situ doping metal lanthanum and cerium, and further doping non-metallic nitrogen by magnetron sputtering to obtain metal / non-metal doped zinc sulfide copper photocatalyst. Compared with the traditional method, the present invention uses metal lanthanum, cerium and non-metallic nitrogen to do the zinc-copper sulfide doping treatment, and the obtained photocatalyst has a narrow band gap, a high utilization rate of visible light, and the photogenerated electrons and holes are not easily Composite, high photocatalytic efficiency, can be widely used in the field of hydrogen production by photolysis of water and organic wastewater treatment.

Description

technical field [0001] The invention belongs to the technical field of photocatalysts, and provides a metal / nonmetal-doped zinc-copper sulfide photocatalyst and a preparation method. Background technique [0002] The main research fields of semiconductor photocatalysts include: (1) Using sunlight as energy and oxygen in the air as oxidant to promote the complete decomposition of organic pollutants in water and air into CO 2 、H 2 O and other inorganic salts are an ideal pollutant control technology; (2) Using solar energy to split water into chemical energy such as hydrogen and oxygen is an important part of the hydrogen economy; (3) Directly converting solar energy into electrical energy . Semiconductor photocatalysis technology has unique properties such as deep reaction at room temperature and direct use of solar energy to drive the reaction. It shows broad development prospects in environmental pollution control and clean energy conversion. [0003] The basic catalytic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/043B01J35/02B01J35/00
CPCB01J27/043B01J35/40B01J35/39
Inventor 张玉英
Owner 重庆积众吉昌新材料科技有限公司