Reducing titanium dioxide photocatalyst as well as preparation method and application thereof

Abstract

The invention belongs to the technical field of catalysis materials and discloses a reducing titanium dioxide (TiO2) photocatalyst as well as a preparation method and an application thereof. The TiO2photocatalyst is prepared by the steps of mixing TiO2 with a reducing agent, putting the mixture into a tube furnace filled with protective gas, reacting at 100-1000 DEG C so as to obtain a powder sample, flushing the powder sample through acid, and drying. The TiO2 photocatalyst is a visual photocatalyst with high activity and controllable photoresponse, the adsorption enrichment and in-situ degradation of volatile organic compounds on the catalyst can be realized, the utilization rate of optical photons is increased, the degradation efficiency of the volatile organic compounds is relativelyhigh, meanwhile, the operation is simple, and the application basis is provided for the pollution control of the volatile organic compounds.

Description

technical field [0001] The invention belongs to the technical field of catalytic materials, more specifically, relates to a reduced titanium dioxide (TiO 2 ) photocatalyst and preparation method and application. Background technique [0002] Volatile organic compounds are a very important class of air pollutants, and are important precursors of secondary pollutants such as secondary organic aerosols and ozone. At the same time, studies have confirmed that most volatile organic compounds will also cause serious harm to human health. Therefore, the simultaneous elimination of VOC pollution and risk has become a key difficulty in the field of air pollution control. [0003] Studies have shown that although physical methods represented by activated carbon adsorption can purify volatile organic compounds, they face secondary pollution problems such as adsorption saturation and desorption of adsorbents. The biological method also has disadvantages such as complicated maintenance...

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Problems solved by technology

[0003] Studies have shown that although physical methods represented by activated carbon adsorption can purify volatile organic compounds, they face secondary pollution problems such as adsorption saturation and desorption of adsorbents.

The biological method also has disadvantages such as complicated maintenance process, high requirements on environmental stability, and unsatisfactory treatment effect on volatile organic compounds.

Chemical methods represented by photocatalysis can efficiently degrade and mineralize most volatile organic compounds, but the currently commonly used TiO 2 Photocatalysts are limited by their forbidden band width (≈3.2eV), and can only use less than 5% of the ultraviolet light in sunlight, which limits the further application and promotion of photocatalytic technology in volatile organic compound pollution control.

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