A manganese ferrite / bismuth tungstate heterojunction photocatalyst and a preparation method and application thereof

By constructing a manganese ferrite/bismuth tungstate heterojunction photocatalyst, the problem of low separation efficiency of photogenerated electron and hole pairs in photocatalysts was solved, achieving highly efficient photocatalytic reduction of carbon dioxide, which has good application prospects.

CN120420995BActive Publication Date: 2026-08-04LIAONING UNIVERSITY
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Patent Information

Application Number
CN202510560249.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-04-30
Publication Date
2026-08-04
Estimated Expiration
2045-04-30

AI Technical Summary

Technical Problem

Existing single-component photocatalysts have difficulty effectively separating photogenerated electron and hole pairs during the photocatalytic reduction of carbon dioxide, resulting in insufficient photocatalytic activity.

Method used

A heterojunction photocatalyst was constructed using manganese ferrite and bismuth tungstate. The manganese ferrite/bismuth tungstate heterojunction photocatalyst was prepared by alkaline etching to form a nanoflower structure to improve carrier separation efficiency, and carbon dioxide was reduced to carbon monoxide by visible light.

Benefits of technology

It improves the photocatalytic activity and stability of the photocatalyst, enhances its ability to reduce carbon dioxide, and has a simple and low-cost preparation method, making it suitable for large-scale production.

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Abstract

The application belongs to the technical field of photocatalytic materials, and particularly relates to a manganese ferrite / bismuth tungstate heterojunction photocatalyst and a preparation method and application thereof. The preparation method comprises the following steps: 1) dissolving sodium tungstate dihydrate, bismuth nitrate pentahydrate and cetyltrimethylammonium bromide in deionized water, and obtaining bismuth tungstate by using a hydrothermal method; 2) dissolving iron chloride hexahydrate and manganese chloride tetrahydrate in water, adding sodium hydroxide solution, and obtaining manganese ferrite by using a hydrothermal method; 3) dissolving the bismuth tungstate and the manganese ferrite into a sodium hydroxide solution, and then stirring and drying to obtain the manganese ferrite / bismuth tungstate heterojunction photocatalyst. The formation of the heterojunction can greatly improve the activity of the manganese ferrite / bismuth tungstate in photocatalytic reduction of carbon dioxide.
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