A kind of preparation method of hydrogen tungsten bronze/cadmium sulfide composite photocatalyst

Abstract

The invention discloses a preparation method of a hydrogen tungsten bronze / cadmium sulfide composite photocatalyst, which uses WCl 6 As the precursor, n-propanol is used as the solvent, and W is generated through solvothermal reaction. 18 O 49 ; Then add cadmium acetate and thiourea, and react in a water bath to generate W 18 O 49 / CdS; then undergo in-situ light-induced reduction to obtain the composite photocatalyst H 0.53 WO 3 / CdS. The preparation method of the present invention is novel, simple and convenient to operate, efficient in synthesis, and low in cost. For the first time, it extends the excitation light of the photochromic phenomenon of tungsten oxide to visible light, and combines it with the photocatalytic process to use hydrogen tungsten bronze to quickly transfer electrons and absorb light. It not only effectively improves the separation of photogenerated carriers of the composite photocatalyst and reduces the recombination rate of carriers, but also greatly improves the light absorption capacity of the composite photocatalyst, allowing it to exhibit excellent photocatalytic hydrogen production performance. , and has broad application prospects in the field of exploring clean renewable energy.

Description

technical field [0001] The invention belongs to the field of photocatalysis, and in particular relates to a preparation method of a hydrogen tungsten bronze / cadmium sulfide novel composite photocatalyst and an application of the obtained composite photocatalyst in photolysis of water to produce hydrogen. Background technique [0002] Tungsten bronze is a highly stable cation-doped metal oxide with dark blue metallic luster, generally used in M x WO 3 Indicates that it exhibits the properties of metal conductors or semiconductors, and its color and performance will have corresponding differences with the difference of M and x. Tungsten bronze-type materials have unique and excellent properties in ferroelectricity, piezoelectricity, pyroelectricity, nonlinear optics, etc., and have gradually attracted widespread attention. At present, they have become second only to perovskite-type materials in the field of electronic material research. However, there are relatively few repo...

AI Technical Summary

Problems solved by technology

At present, the co-catalysts used to construct CdS composite photocatalysts mainly include some noble metals, graphene and transition metal chalcogenides, but there is no public report on the combination of tungsten bronze as a co-catalyst and CdS for water splitting under visible light.

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