Indoor efficient formaldehyde removing photocatalyst varnish

Abstract

The invention provides indoor efficient formaldehyde removing photocatalyst varnish. The indoor efficient formaldehyde removing photocatalyst varnish is prepared from 5-10 parts of a TiO2-Ag-thiol-derivatized porphyrin photocatalyst, 100-200 parts of distilled water, 20-50 parts of silica sol, 0.1-0.5 part of 35% acetic acid and 1-2 parts of an ink wetting dispersant. A preparation method comprises the steps that the distilled water is placed into a high-speed dispersion machine, the ink wetting dispersant is added at the stirring speed of 3000-4000 r / min, and dispersion under stirring is performed for 15-20 min; the revolving speed is regulated to be 200-400 r / min, and the TiO2-Ag-thiol-derivatized porphyrin photocatalyst is added; the revolving speed is regulated to be 5000-6000 r / min, and dispersing under high-speed stirring is performed for 2-4 h; the revolving speed is regulated to be 2000-3000 r / min, silica sol is slowly added, 5 parts of 35% acetic acid is dropwise added, the revolving speed is regulated to be 5000-6000 r / min, and stirring is performed for 2-4 h; the photocatalyst varnish is prepared. The indoor efficient formaldehyde removing photocatalyst varnish can efficiently degrade formaldehyde in indoor air under the visible light condition, is wide in photoresponse range which comprises an ultraviolet light area and part of a visible light area within 600 nm or below and is an efficient product for indoor air treatment.

Description

technical field [0001] The invention belongs to the field of interior decoration materials, in particular to an indoor high-efficiency formaldehyde-removing photocatalyst varnish. Background technique [0002] With the improvement of people's living standards, the decoration industry is rising day by day, and the problem of indoor air pollution is also becoming more and more serious. Most modern people spend 80% to 90% of their time indoors every day, so indoor air pollution is more harmful to the human body. According to the survey of relevant international organizations, 2.8 million people die directly or indirectly from decoration pollution every year in the world, and 30% of the world's newly built and rebuilt buildings have indoor air pollution harmful to health. Facing the increasingly serious situation of indoor air pollution, in 2011, the National Indoor Environment and Environmental Protection Product Quality Supervision and Inspection Center launched the "First Na...

AI Technical Summary

Problems solved by technology

[0004] The main problems at present are: first, the pure nano-titanium dioxide photocatalyst can only absorb ultraviolet light below 400nm. In the natural environment, the proportion of ultraviolet light is relatively low, less than 10% of natural light, so the pure photocatalyst is basically useless; As a household photocatalyst, it must achieve visible light absorption; of course, it is best to absorb far-infrared light, so that it can maintain good formaldehyde degradation performance at night and in closed cabinets

Images