Preparation method of self-cleaning material for visible light catalysis

Abstract

The invention relates to a preparation method of a self-cleaning material for visible light catalysis, in particular to a preparation method of nitrogen-doped nano titanium dioxide prepared by adopting nitrogen-hybridized mesoporous carbon as a template, the self-cleaning material has visible light catalysis and self-cleaning functions, and the technical scheme comprises the steps of soluble titanium salt adsorption loading, nano titanium dioxide hydrosol preparation, and nitrogen-doped nano titanium dioxide preparation. The nitrogen-doped nano TiO2 self-cleaning material is prepared through the above three parts, the chemical composition of the nitrogen-doped nano TiO2 self-cleaning material is Ti < 1-x > N < x > O < 2 >, x is equal to 0.01-0.2, and the particle size is 5-20 nm. According to the invention, nitrogen-hybridized mesoporous carbon loading or nitrogen doping is carried out on the nano TiO2 material, so that the photocatalytic wavelength is red-shifted to a visible light range, the hydrophilic performance is improved, and the photocatalytic efficiency and the self-cleaning performance are greatly improved.

Description

technical field [0001] The invention relates to a preparation method of a visible light catalyzed self-cleaning material, especially a preparation method of nitrogen-doped nano-titanium dioxide prepared by using nitrogen-hybridized mesoporous carbon as a template, which has the functions of visible light catalysis and self-cleaning, and belongs to the chemical industry and new materials field. Background technique [0002] With the continuous improvement of people's quality of life requirements and the continuous enhancement of environmental protection and energy-saving awareness, the surface with self-cleaning function has been developed rapidly. Self-cleaning surface refers to a surface on which pollutants or dust on the surface can automatically fall off or be degraded under the action of gravity, rain, wind and other external forces. It is usually divided into super-hydrophilic self-cleaning surface and super-hydrophobic self-cleaning surface. kind. Coating Nano TiO 2...

AI Technical Summary

Problems solved by technology

[0007] Chinese patent CN109667139B (2021-06-29) discloses an anti-ultraviolet self-cleaning composition and its preparation method and application, and Chinese patent CN108912994B (2019-12-31) discloses the preparation of a nitrogen-doped titanium dioxide self-cleaning waterborne polyurethane coating Method; Chinese patent CN109453799A (2019-03-12) discloses nano-titanium dioxide material coated with nitrogen-doped carbon material and its application: Chinese patent CN102587610B (2014-10-29) discloses a surface-coated nitrogen-doped nano-titanium dioxide film The visible light response self-cleaning fluorocarbon aluminum veneer; but there is still a lot of room for improvement of these patented technologies, and the scope of application needs to be continuously expanded