Silver phosphate/bismuth sulfide/bismuth oxide double-Z-type photocatalyst and preparation method thereof

Abstract

The invention discloses a silver phosphate / bismuth sulfide / bismuth oxide double-Z-type photocatalyst and a preparation method thereof. The silver phosphate / bismuth sulfide / bismuth oxide double-Z-typephotocatalyst takes bismuth oxide as a carrier, and the surface of the bismuth oxide is modified by bismuth sulfide and silver phosphate. The preparation method includes the steps: preparing mixed solution of bismuth oxide and thiourea; performing hydrothermal reaction on the mixed solution of the bismuth oxide and the thiourea to prepare a bismuth sulfide / bismuth oxide compound; mixing the bismuth sulfide / bismuth oxide compound and Ag+ solution, and adding HPO4<2-> solution to perform precipitation reaction to prepare the silver phosphate / bismuth sulfide / bismuth oxide double-Z-type photocatalyst. The silver phosphate / bismuth sulfide / bismuth oxide double-Z-type photocatalyst has the advantages of high absorption capacity, low light-generated electron-hole recombination rate, good photocatalytic performance and stability and the like. The photocatalyst is a novel photocatalytic material, and the preparation method of the photocatalyst has the advantages of simple process, easily controlled condition, low cost and the like and is suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and relates to a silver phosphate / bismuth sulfide / bismuth oxide double Z-type photocatalysis and a preparation method thereof. Background technique [0002] With the continuous development of society, the problems of water pollution and shortage are becoming more and more obvious, and it is urgent to find an energy-saving, environmentally friendly and efficient water pollution control technology to solve these problems. Photocatalytic technology is to purify pollutants through the redox ability of semiconductor photocatalysts under light conditions, and has shown good application prospects. So far, a large number of materials have been found to have photocatalytic properties, which mainly include metal-based photocatalytic materials and non-metal-based photocatalytic materials. In recent years, bismuth-based photocatalytic materials have been widely used in the research of photocatalysts ...

AI Technical Summary

Problems solved by technology

However, the existing bismuth-based heterojunction photocatalytic materials still have problems such as weak light absorption ability and slow photogenerated electron-hole separation rate, which limit the photocatalytic performance of the material.

Therefore, how to comprehensively improve the problems of weak light absorption ability, slow photogenerated electron-hole separation rate, and poor photocatalytic performance in the existing bismuth-based heterojunction materials, and obtain a kind of material with strong light absorption ability and low photogenerated electron-hole recombination rate. , high photocatalytic performance, good stability silver phosphate / bismuth sulfide / bismuth oxide double Z-type photocatalyst and matching silver phosphate / bismuth sulfide / bismuth oxide double Z-type photocatalyst with simple process, easy control conditions and low cost The preparation method of photocatalyst is of great significance for further expanding the application range of photocatalysis technology

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