Composite nano photocatalytic material and preparation method thereof

Abstract

The invention provides a composite nano photocatalytic material and a preparation method thereof. Multi-walled carbon nanotubes and nano titanium dioxide are adopted, the multi-walled carbon nanotubesare customized into reticular tubes, the nano titanium dioxide is mixed to the carbon nanotubes to obtain the composite nano photocatalytic material, and the composite nano photocatalytic material isused for a purifier for removing formaldehyde. The fibrous morphology of the original MwCNTs is kept; the TiO2 coating and the carrier MWCNTs are tightly combined, and TiOC bonds are formed; the specific surface area of the composite nano photocatalytic material can be effectively increased due to the existence of the carrier MWCNTs, the adsorption capacity to pollutants is enhanced, and transmission of TiO2 with electrons to the MWCNTs can be promoted; and due to the formation of the TiOC bonds, an impurity energy level is formed near a TiO2 valence band, so that the absorption and utilization of visible light are improved. The prepared TiO2 / MWCNTs composite photocatalytic material shows relatively high visible light catalytic activity; and when the material is used in the purifier, no consumable loss can be realized, and the cost of the air purifier is reduced.

Description

technical field [0001] The invention mainly relates to the technical field of new photocatalytic materials, in particular to a composite nano photocatalytic material and a manufacturing method thereof. Background technique [0002] Among many photocatalysts, TiO 2 It is favored by people for its high activity, good thermal performance, long duration, cheap price, non-toxic and harmless. [0003] How to prepare a catalyst that maintains high catalytic activity and can be uniformly and firmly loaded on the surface of different materials is one of the focuses of current photocatalyst research. But since TiO 2 The absorption spectrum range is limited to ultraviolet light, and the recombination rate of photogenerated electrons and holes is high, all of which affect the photocatalytic efficiency. It is realized that the development of composite nano-TiO with new properties 2 The importance of materials to enhance nano-TiO 2 One of the effective ways to extend the recombinatio...

AI Technical Summary

Problems solved by technology

But since TiO 2 The absorption spectrum range is limited to ultraviolet light, and the recombination rate of photogenerated electrons and holes is high, which affects its photocatalytic efficiency

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