Nano-spherical porous low-light photocatalyst for degrading formaldehyde, preparation method and application thereof

Abstract

The invention discloses a nanometer spherical porous weak light photocatalyst for degrading formaldehyde, and a preparation method and an application thereof. The photocatalyst comprises 0.2-30wt% of a titanium source, 60-99wt% of an alcohol solvent, 0.005-0.01wt% of a hydrolysis inhibitor, 0.005-0.01wt% of metal ion-containing deionized water, 10-40wt% of hydroxy group-containing mediate strong acid, and 1-5wt% of inorganic dispersant-containing deionized water, and the hydroxy group-containing mediate strong acid contains SiO2 crystal seeds; and the photocatalyst is a transparent sol liquid of nanoparticles, the particle size of the transparent sol liquid is 10-30nm, the surface of the photocatalyst is spherical porous distribution, and the specific surface area of the photocatalyst is large, and is above 300m<2> / g averagely. The photocatalyst has the advantages of mild production preparation conditions, small production safety risk, easy realization of batch production, weak light catalytic purification and high stability, and solves the problems of strict preparation conditions, low sunshine utilization rate, low air purifying and degrading efficiency, large base material apparent influence, construction inconvenience and the like of present mature photocatalyst products.

Description

technical field [0001] The invention relates to the technical field of photocatalysts, in particular to a nano-spherical porous weak-light photocatalyst for degrading formaldehyde, a preparation method and an application thereof. Background technique [0002] At present, the problem of environmental pollution is prominent, especially the large area of ​​smog seriously threatens the living environment of human beings, and the control of ambient air is urgent. Photocatalyst, as an emerging environmental protection material suitable for air purification, has been more and more extensively studied. However, most of the existing technologies are laboratory research and development products, and use ultraviolet light or visible light as the energy excitation source. In terms of application, the treatment of water body pollutants is the main application. The products actually used for the degradation of formaldehyde pollutants are almost blank. The main hazard of formaldehyde is ma...

AI Technical Summary

Problems solved by technology

[0009]2) Adopt the "passive contact degradation" mode, which is highly dependent on light intensity, "work with light, stop without light", almost no degradation effect under low light conditions, the overall Low purification effect;

[0010]3) The production equipment and conditions are demanding, the cost is high, the efficiency is low, and industrialization is difficult;

[0011]4) Most of them have undergone high-temperature sintering process, and the form of powdered products greatly limits their application fields and scope;

[0012]5) The loaded molding process is complicated, the film-forming adhesion is not high, it is easy to pulverize and fall off, and the appearance requirements of the substrate cannot be met. There are inevitably organic substances in the ingredients, and there are Risk of Secondary Pollution

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