Method for raising titanium dioxide film self-cleaning glass photocatalytic activity

Abstract

The method for raising optical catalytic activity of titanium dioxide film self-cleaning glass is applicable to the fields of building window, car glass and optical glass, uses glass as base body forcoating film and includes the following steps: using sol-gel method to prepare titanium dioxide film, impregnating glass surface and coating film, acid treating surface of titanium dioxide film, washing with water and drying, the sodium ion of titanium dioxide film surface can be controlled in 0.3%, carbon content of film surface is reduced, hydroxy content of surface is increased, so that the optical catalytic activity of the glass can be greatly raised. It features signal method, effective and easy-to-control glass quality.

Description

technical field [0001] The present invention relates to the preparation method of highly active titanium dioxide film self-cleaning glass such as architectural glass, automobile glass, eye glass, optical glass, etc., and the present invention also relates to the fields of antifouling, self-cleaning and air purification on the surface of glass, ceramics or other building materials . Background technique [0002] People often use various cleaning agents to clean window glass, curtain wall glass or automobile glass. The reason is that it is difficult to use pure water to clean the organic pollutants on the glass surface due to the adhesion of organic pollutants in the air to the glass surface. Surfaces are cleaned. If a layer of highly active transparent titanium dioxide film is coated on the surface of ordinary soda-lime glass, it is quite useful for self-cleaning of the glass surface and indoor and outdoor air purification. There are many me...

AI Technical Summary

Problems solved by technology

However, the uniformity, light transmittance and adhesion of the film are affected, and the process is difficult to control and repeat, and the coating time and cost increase

Some people also treat the glass substrate with nitric acid or sulfuric acid to partially replace the sodium ions in the glass, form a diffusion barrier layer of sodium ions on the glass surface, and then coat the film, but this method cannot completely prevent the diffusion of sodium ions into titanium dioxide. In the thin film, the photocatalytic activity of the prepared titanium dioxide coated self-cleaning glass is not high, and there is no self-cleaning function