Magnetic photocatalysis nanometer composite material using bismuth oxide and nickel ferrite and preparation method thereof

Abstract

The invention discloses a magnetic photocatalysis nanometer composite material using bismuth oxide and nickel ferrite and a preparation method thereof. The magnetic photocatalysis nanometer composite material using bismuth oxide and nickel ferrite is mainly prepared from bismuth oxide, nickel ferrite and ferroferric oxide; the bismuth oxide is nanometer powder; the nickel ferrite is nanometer powder; the ferroferric oxide is nanometer powder. The prepared magnetic photocatalysis nanometer composite material using bismuth oxide and nickel ferrite can be recovered in the external magnetic field; the circulation utilization of a catalyst is realized; the cost is reduced; due to the existence is silver, the catalytic degradation of the organic contaminants under the visible light excitation is realized; the application range of the photocatalysis composite material is expanded; meanwhile, the heterojunction is formed through the combination of bismuth oxide and nickel ferrite; the light energy utilization interval is expanded to the visible light region; a matched energy zone structure is favorable for the separation of photo-induced electrons and electron holes; the photocatalysis degradation efficiency is further improved.

Description

technical field [0001] The invention relates to a magnetic photocatalytic nano composite material using bismuth oxide and nickel ferrite, in particular to a magnetic photocatalytic nano composite material using bismuth oxide and nickel ferrite and a preparation method thereof. Background technique [0002] Semiconductor-based photocatalysts have been widely used in the environmental field due to their excellent properties. Because titanium dioxide is non-toxic, chemically stable and cheap, it is considered as an ideal photocatalytic semiconductor material and has attracted extensive attention from researchers. However, titania has a large energy gap (~3.2eV) and only exhibits photocatalytic activity in the ultraviolet band, which severely limits its application. The realization of TiO2 photocatalysis under visible light excitation has thus become a research hotspot. Methods including compounding with noble metal particles (such as silver, gold, platinum) have been proposed...

AI Technical Summary

Problems solved by technology

However, titania has a large energy gap (~3.2eV) and only exhibits photocatalytic activity in the ultraviolet band, which severely limits its application.