a bi 2 wo 6 /zns heterojunction photocatalyst and preparation method thereof

Abstract

The invention discloses a Bi 2 WO 6 / ZnS heterojunction photocatalyst and its preparation method, by adding Bi 2 WO 6 Synthesis of Bi by Hydrothermal Reaction with ZnS 2 WO 6 / ZnS heterojunction material. The Bi 2 WO 6 / ZnS heterojunction photocatalyst composed of Bi 2 WO 6 and ZnS composition, Bi 2 WO 6 The mass ratio to ZnS is 1:(4~20), among them, Bi 2 WO 6 Wrapping or embedding on the surface of ZnS nanospheres forms a nanosphere structure, and the two phase interfaces form a heterojunction. The prepared Bi 2 WO 6 / ZnS photocatalyst has high crystallinity, and no other impurities are produced, and the absorption range of visible light is enhanced by forming a heterojunction structure, which is better than single ZnS and Bi 2 WO 6 More excellent visible light catalytic activity.

Description

technical field [0001] The invention belongs to the field of photocatalytic materials, in particular to a Bi 2 WO 6 / ZnS heterojunction photocatalyst and preparation method thereof. Background technique [0002] With the development of industry, the problem of water pollution is becoming more and more serious. Among them, the dye industry will produce a large amount of toxic and difficult-to-degrade colored organic waste liquid in the production process. How to effectively degrade these organic waste liquids is a technology that still needs to be vigorously developed. Rhodamine B is a kind of artificially synthesized dye with bright pink color, which widely exists in printing and dyeing wastewater. Experiments on mice have found that rhodamine B can cause sarcoma in subcutaneous tissue and is suspected to be a carcinogen. Moreover, as a xanthene dye, rhodamine B is difficult to remove through biodegradation, and a large amount of use will cause serious harm to the water ...

AI Technical Summary

Problems solved by technology

However, due to its small absorption range of visible light, its photocatalytic application is limited. Therefore, Bi 2 WO 6 Combining base photocatalytic materials with other materials to improve their photocatalytic performance is a research hotspot in recent years.

[0005] On the other hand, at present, most of the composite photocatalysts are prepared by multi-step growth method and the contact area of ​​the two semiconductors in the heterojunction is limited, the preparation process is cumbersome, and it is easy to produce other toxic substances to pollute the environment, etc.

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