A kind of photocatalyst varnish with high-efficiency formaldehyde removal indoor

Abstract

An indoor high-efficiency formaldehyde-removing photocatalyst varnish is prepared from the following raw materials: 5 to 10 parts of TiO2-Ag-mercaptoporphyrin photocatalyst, 100 to 200 parts of distilled water, 20 to 50 parts of silica sol, 0.1 to 0.5 parts of 35% acetic acid and 1 to 2 parts of ink wetting and dispersing agent; the preparation method is: place distilled water in a high-speed disperser, add the ink wetting and dispersing agent at a stirring speed of 3000 to 4000 r / min, stir and disperse for 15 to 20 minutes; adjust the speed to 200 to 400r / min, add TiO2-Ag-mercaptoporphyrin photocatalyst; adjust the speed to 5000-6000r / min, stir and disperse at high speed for 2-4 hours; adjust the speed to 2000-3000r / min, slowly add silica sol, and add 35% acetic acid dropwise 5 parts, adjust the rotation speed to 5000-6000r / min, and stir for 2-4 hours; a photocatalyst varnish is obtained. It can efficiently degrade formaldehyde in indoor air under visible light conditions. It has a wide light response range, including responses below 600nm in the ultraviolet light region and part of the visible light region. It is an efficient product for indoor air management.

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 Product Quality Supervision and Inspection Center carried out the "First National I...

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

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