Photocatalyst coating and coating layer thereof

Abstract

The invention belongs to the technical field of photocatalyst materials, and particularly relates to a photocatalyst coating which comprises a wrinkled graphene sphere carrier and a titanium dioxide functional layer coating the surface of the wrinkled graphene sphere carrier, the mass ratio of wrinkled graphene spheres to titanium dioxide is 1: (0.2-2), and ID / IG is smaller than 0.01. The wrinkledgraphene spheres are of an AB stacked structure, and the stacking thickness is larger than 30 layers. The invention further comprises a photocatalyst coating layer and a preparation method thereof, the adopted wrinkled graphene spheres have a hot electron accumulation effect, the potential barrier of graphene and titanium dioxide is reduced, the light quantum efficiency is improved, meanwhile, titanium dioxide modified by chloroplatinic acid and sodium borohydride serves as a functional layer, the valence state structure of titanium atoms is increased, the band gap is reduced from multiple angles, and the photocatalytic performance is improved Therefore, the photocatalyst applied to visible light and near-infrared light is finally realized. According to the photocatalyst coating, the light absorption wavelength is expanded, a photocatalyst is widely and efficiently applied under visible light, meanwhile, the energy utilization rate is increased, and the cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of photocatalyst materials, and in particular relates to a photocatalyst paint and a coating thereof. Background technique [0002] With the development of society, social materials have been greatly enriched. However, with the extensive use of chemical products, harmful gases such as formaldehyde will inevitably have an impact on the living and working environment, and even induce body diseases, seriously affecting people's health. [0003] Photocatalyst, also called photocatalyst, is a general term for semiconductor materials with photocatalytic function represented by nano-scale titanium dioxide. As early as the 1930s, scientists had discovered photocatalyst materials based on zinc oxide, which degraded harmful substances into harmless substances through photocatalysis, which brought hope for the improvement of human living environment. In particular, the discovery of Professor Kenichi Honda of the Univ...

AI Technical Summary

Problems solved by technology

Therefore, the use of titanium dioxide photocatalyst needs to be excited by ultraviolet light sources that are harmful to the human body, which is inconvenient to use, and extending its application range to the visible light region has become an urgent problem to be solved.

[0007] Second, the light absorption efficiency is low and the utilization rate is low

The existing titanium dioxide photocatalyst absorbs light energy and also reflects most of it. The absorption of light is limited, which in turn reduces the utilization rate of light energy, which is a waste of electric energy.

[0008] Third, the stability of free radicals is poor and the catalytic efficiency is low

The photocatalysts used in the market are not efficient in converting light energy into free radicals, and the lack of stability of free radicals further reduces the catalytic efficiency

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