A Tungsten Trioxide Composite Titanium Dioxide Photocatalyst for Degrading Formaldehyde

A photocatalyst and photocatalytic technology, applied in the field of photocatalysis, can solve problems such as difficult to realize industrial production, complex process flow, and low efficiency of photogenerated carriers

CN103537294BActive Publication Date: 2016-08-10CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2016-08-10

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Abstract

The present invention relates to the preparation of a kind of composite photocatalyst, more particularly relate to loading P25 type nano-TiO on the nickel foam of large specific surface area 2 Composite WO 3 Photocatalyst with good catalytic degradation effect. The preparation method includes: dissolving ammonium tungstate in hot ammonia water, wet grinding with P25, impregnating and loading it on foamed nickel, drying at 100°C and then calcining at 500°C for 1 hour to obtain foamed nickel-supported WO 3 / P25 photocatalytic material. The preparation method of the invention is simple; no expensive equipment is needed; the raw material price is low; the mechanical performance is good; the photocatalytic degradation rate of the prepared catalyst is greatly improved compared with P25; it can be applied to harmful gases such as formaldehyde indoors and in automobiles The degradation of the powder photocatalyst can avoid problems such as recovery and regeneration difficulties after use.
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Description

technical field The invention belongs to the field of photocatalysis, in particular to the use of foamed nickel as a supporting substrate, WO 3 The preparation method of composite P25 photocatalytic material, and the degradation ability to formaldehyde. Background technique Photocatalytic oxidation has become the most promising air purification technology due to its simple technical operation, mild conditions, low energy consumption, and no secondary pollution. 2 Semiconductors have become a research hotspot among many photocatalysts due to their good chemical stability, corrosion resistance, high activity, low cost, non-toxicity, and no secondary pollution. But TiO 2 The band gap is wide and can only absorb a small amount of ultraviolet light; at the same time, the photon efficiency is low, and it is not easy to recycle. Thus its application prospects are limited. In general, nano-TiO 2 The application of semiconductor photocatalytic degradation of organic pollutants ...

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