Photocatalyst formaldehyde removal catalyst based on titanium dioxide/platinum atom clusters as well as preparation method and application of photocatalyst formaldehyde removal catalyst

Abstract

The invention provides a photocatalyst formaldehyde removal catalyst based on titanium dioxide / platinum atom clusters, which is specifically prepared by the steps of mixing chloroplatinic acid into aP25 titanium dioxide aqueous solution, carrying out in-situ reduction by using sodium borohydride under the action of a polyvinylpyrrolidone protective agent to generate platinum atom clusters, washing with water, and drying to obtain the titanium dioxide / platinum atom cluster catalyst. By preparing the platinum atom clusters, the active specific surface area of the catalyst is increased, and thecatalytic activity and stability of the catalyst are improved. Meanwhile, the catalyst has the characteristics of simple preparation method, no need of high-temperature calcination, low platinum consumption, low cost and the like, and can remarkably improve the indoor formaldehyde removal rate. According to the invention, a simple one-step in-situ reduction deposition preparation technology is adopted, the preparation method is simple, the improvement space is large, and the formaldehyde removal rate of the prepared titanium dioxide / platinum atom cluster catalyst is still kept 98% or above after the prepared titanium dioxide / platinum atom cluster catalyst is continuously used for 180 days.

Description

technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to a photocatalyst formaldehyde-removing catalyst based on titanium dioxide / platinum atomic clusters and a preparation method and application thereof. Background technique [0002] Indoor building materials, decoration materials, decorative materials, cleaning agents, insecticides, disinfectants and other chemical reagents are flooded in all aspects of life, which produces organic substances mainly formaldehyde. Formaldehyde is a colorless, transparent gas with a pungent odor, and has serious harm to the eyes, nose, throat, lungs, liver, and immune system. The toxicity of formaldehyde is higher, has been determined as highly carcinogenic and teratogenic shape substance by the World Health Organization. Therefore, the removal of formaldehyde in indoor or closed environments will be an urgent problem to be solved for a long time in the future. [0003] Photocatalyt...

AI Technical Summary

Problems solved by technology

Compared with platinum nanomaterial catalysts, platinum single-atom catalysts have the advantages of large specific surface area and high catalytic activity, but their stability is poor in air atmosphere; while platinum single-atom clusters take into account the high specific surface area of ​​platinum single atoms, high catalytic activity and platinum nanomaterials. The advantages of good material stability have broad development prospects and application markets in the field of formaldehyde removal

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