Magnetic carbon-supported TiO2 photocatalyst and preparation method thereof

Abstract

The invention provides a magnetic carbon-loaded TiO2 photocatalyst. The magnetic carbon-loaded TiO2 photocatalyst comprises Fe3O4, a carbon material coated on the surface of the Fe3O4, and TiO2 loadedon the surface of the carbon material. According to the invention, the carbon material is used as a carrier, which is beneficial to TiO2 loading, so that the catalytic performance of the photocatalyst is improved; Fe3O4 is used as a magnetic core, and Fe3O4 and TiO2 are tightly combined together through a carbon material, so that the photocatalyst has relatively strong magnetism, and recycling ofthe photocatalyst is facilitated. Results of the embodiment show that the magnetic carbon-supported TiO2 photocatalyst provided by the invention catalyzes and degrades methylene blue under ultraviolet irradiation, and the degradation rate can reach 99.61%; meanwhile, the recovery rate of the magnetic carbon-supported TiO2 photocatalyst provided by the invention can reach 98.57%, and the magneticcarbon-supported TiO2 photocatalyst still has a good catalytic effect after being recycled for 8 times.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a magnetic carbon-supported TiO 2 Photocatalyst and its preparation method. Background technique [0002] With the increasingly severe environmental and energy problems, more and more researchers have begun to study the photocatalysis of semiconductors to catalyze the oxidation and degradation of harmful and toxic pollutants. TiO 2 As a basic N-type semiconductor material, it has a special crystal structure and surface structure, and has the advantages of low price, strong photocatalytic activity, stable chemical properties, wide application range, low dissolution rate and non-toxicity. important raw material, but the TiO 2 There are also some limitations for photocatalysts. [0003] First, TiO 2 Its own band gap is large, and the probability of electron-hole recombination is high during the photoreaction process, which makes the photocatalytic efficiency low and the photo...

AI Technical Summary

Problems solved by technology

TiO 2 As a basic N-type semiconductor material, it has a special crystal structure and surface structure, and has the advantages of low price, strong photocatalytic activity, stable chemical properties, wide application range, low dissolution rate and non-toxicity. important raw material, but the TiO 2 There are still some limitations for photocatalysts

[0003] First, TiO 2 Its own band gap is large, and the probability of electron-hole recombination is high during the photoreaction process, which makes the photocatalytic efficiency low and the photocatalytic performance of the catalyst is weak; secondly, TiO 2 The smaller the particle size, the stronger the catalytic performance, but the smaller the particle size of TiO 2 The lighter the quality, the more difficult it is to recycle, the lower the reuse rate, and the incomplete recycling is likely to cause secondary pollution

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