Preparation method of copper-rich modified defect titanium dioxide and cuprous sulfide heterojunction hydrogen production catalyst

Abstract

The invention relates to a preparation method of a copper-rich modified defect titanium dioxide and cuprous sulfide heterojunction hydrogen production catalyst. A wide band gap semiconductor TiO2 withgood light absorption capability is doped with Cu, surface detects are artificially introduced to make Cu partially reduced and exposed on the surface of TiO2, and then sulfuration treatment is carried out to form a Cu-doped modified defect TiO2 and Cu2S heterojunction. The doping content of Cu is controlled to make the catalyst have a highest catalytic efficiency, and the catalyst is sulfuratedto form the Cu-doped modified defect TiO2 and Cu2S heterojunction in order to make the heterojunction and doping modification have synergistic effects and obtain a higher photocatalytic efficiency. The method of the invention has the advantages of simplicity, environmental protection and low cost; the catalyst has the advantages of obvious catalytic effect, quickness in reaction, and high repeatability; and the catalyst has potential application values in visible light catalytic water decomposition and hydrogen production.

Description

technical field [0001] The invention belongs to the field of preparation and application of nanometer materials, and in particular relates to a preparation method of a copper-rich modified defect titanium dioxide and cuprous sulfide heterojunction hydrogen production catalyst. Background technique [0002] With the development of industry, the increasingly depleted energy reserves and increasingly severe environmental pollution are two major challenges that people have to face. Fossil energy has been consumed as the main body of energy for a long time, and it has been difficult to meet the long-term energy supply. On the other hand, fossil fuels generate a large amount of CO while burning energy. 2 , SO 2 and other harmful gases, which in turn brings pollution problems such as the "greenhouse effect" [1] . Therefore, how to solve the above two problems is of great strategic significance to achieve sustainable development and maintain a harmonious ecological environment, a...

AI Technical Summary

Problems solved by technology

However, this system still faces many challenges such as: how to overcome TiO 2 The wide bandgap semiconductor characteristics expand its spectral response range, reduce the high recombination rate of photogenerated electrons and holes, and accelerate the diffusion rate of hot carriers.

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