Preparation method of aqueous paint for degradation of formaldehyde gas and toluene gas

Abstract

A preparation method of an aqueous paint for degradation of a formaldehyde gas and a toluene gas is provided, and comprises: using a natural micropore nonmetal mineral as raw material; purifying the mineral by means of scrubbing, acid leaching, calcining and the like; using the purified micropore nonmetal mineral as a carrier, using an inorganic titanium salt as a precursor, and preparing a nano titanium dioxide composite photocatalytic material by neutralization, hydrolysis and precipitation at a low temperature; and using the prepared nano titanium dioxide composite photocatalytic material as a filler, and preparing the aqueous paint for degradation of the formaldehyde gas and the toluene gas. Harmful substances such as volatile organic compounds, formaldehyde, toluene and the like are not contained in the paint, and the formaldehyde gas and the toluene gas can be effectively degraded, with the formaldehyde degradation rate of up to 80% or more and the toluene degradation rate of up to 35% or more.

Description

technical field [0001] The invention relates to a preparation method of an inorganic chemical and photocatalytic material, in particular to a preparation method of a water-based paint which can be used for the gas degradation of formaldehyde and toluene. Background technique [0002] Indoor formaldehyde and toluene pollution are the most harmful pollution in indoor pollution, seriously endangering people's health. Due to the limitations of current technological means and materials, the hazards of formaldehyde and toluene cannot be removed from the source in the short term. Therefore, effective removal of formaldehyde and toluene pollution in living rooms and offices is very important to protect human health. [0003] At present, the control methods of formaldehyde and toluene gas at home and abroad mainly include physical adsorption method, chemical reaction method, catalytic oxidation method, biological method, composite method and cold plasma method. There is a problem o...

AI Technical Summary

Problems solved by technology

Although the chemical reaction method can quickly remove formaldehyde and toluene in the air, this method needs to consume a large amount of chemical reagents, the cost is high, and the reagents used in some methods have certain toxicity

In addition, the chemical reaction method also has problems such as difficult recovery of the carrier after the reaction is saturated, and a large amount of material waste.

The thermal catalytic oxidation method does not need to consume chemical reagents, and there is no problem of reaction saturation, but it often requires a higher temperature, so it is not suitable for indoor use

Photocatalytic method and cold plasma method are new methods for decomposing formaldehyde and toluene that have emerged in recent years. Compared with photocatalytic method, cold plasma method has shorter decomposition time, large processing capacity and high decomposition efficiency, but consumes more energy (5 ~20Wm-2), and the simple use of this technology has the disadvantage of producing a large amount of new pollutants such as nitrogen oxides and various free radical gases

Photocatalytic technology has the advantages of being usable at room temperature, low energy consumption, and no secondary pollution. It is considered to be an air purification technology with great application prospects, but there are problems such as poor dispersion of catalysts, difficulty in recycling, and high production costs.