Preparation method and application of non-noble metal copper indium sulphide/zinc indium sulphide compound photocatalyst

Abstract

The invention belongs to the field of photocatalytic materials, and provides a non-noble metal copper indium sulphide / zinc indium sulphide compound photocatalyst with a wide visible-light response range, high photocatalytic activity and stability and a preparation method and application in visible-light response photocatalysis hydrogen production thereof. Firstly, a mixed aqueous solution of zincchloride, indium chloride and thioacetamide is subjected to high-temperature hydrothermal reaction to prepare zinc indium sulphide powder; then the zinc indium sulphide powder is dispersed in water through ultrasound, a mixture, indium chloride, cuprous chloride and thioacetamide are mixed, and through high-temperature hydrothermal reaction, the copper indium sulphide / zinc indium sulphide compoundphotocatalyst is prepared. The photocatalyst does not contain noble metal, the cost is lower, and the synthesis method is simple, so that the photocatalyst has wide application prospects in the fieldof visible-light drive photocatalysis.

Description

Technical field: [0001] The invention relates to related technical fields such as inorganic chemistry, clean energy conversion materials, and photocatalytic materials, and in particular to a preparation method and application of a sulfur indium copper / sulfur indium zinc composite photocatalyst. Background technique: [0002] In the 21st century, the energy crisis and environmental pollution have become two major problems plaguing mankind. The development of non-polluting, renewable, low-cost, and wide-source green new energy is a huge challenge facing the development of the world today. Based on the advantages of environmental friendliness, abundant resources, freedom from transportation, and inexhaustible supply, solar energy is the most ideal energy source in the future. Semiconductor photocatalysts can use solar energy to decompose water into clean energy hydrogen, which is burned to release energy and generate water. This process is one of the most ideal ways to utilize...

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Problems solved by technology

However, a single SInZn is not conducive to the transfer and separation of photogenerated charges, resulting in the recombination of photogenerated electrons and holes, which reduces the photocatalytic quantum efficiency.

In response to the above shortcomings, researchers have carried out a lot of research, such as: adjusting the morphology by changing the synthesis conditions, which has little effect; depositing an appropriate amount of noble metals on the semiconductor surface to capture photogenerated electrons and inhibit the recombination of photogenerated carriers. It is one of the effective methods to improve photocatalytic performance, but it is not suitable for large-scale production due to high preparation cost and limited reserves of precious metals (public number CN108620105A, public number CN106111053A, public number CN108404960A, public number CN108043436A)

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