A kind of photocatalyst, its preparation method and application

Abstract

The invention relates to a photocatalyst and a preparation method and use thereof. The preparation method of the photocatalyst comprises the following steps: dissolving a bismuth source in a dilute nitric acid solution of which the pH is 5.0 to form a clear solution A; ultrasonically dispersing CTAB (cetyltrimethyl ammonium bromide), PVP (polyvinyl pyrrolidone) and a spherical Ni elementary substance in 10mL of ethyl alcohol to form a mixed system B; mixing the clear solution A and the mixed system B, and standing at room temperature to obtain a white precipitate; washing and drying the white precipitate to constant weight. The obtained nano material can be used for degrading toxic and non-degradable organic pollutants, which are discharged from a factory, into non-toxic carbon dioxide and water. The photocatalyst can be repeatedly used, the activity of the photocatalytic performance of the photocatalyst cannot be reduced along with the increase of use frequency, visible light is unique energy needed in a photocatalytic process, and in conclusion, the photocatalyst has a high economic benefit. Therefore, the photocatalyst has potential application prospects in the fields of environmental management and protection so as to have high economic and social benefits.

Description

technical field [0001] The invention relates to the synthesis and application of high-efficiency photocatalysts, in particular to a photocatalyst, its preparation method and application. Background technique [0002] In the past few decades, the use of photocatalytic technology to degrade various wastes generated in industrial production has become one of the current research hotspots. TiO 2 is the most representative catalyst, but TiO 2 The band gap is 3.2eV, which is a kind of wide band gap semiconductor, which can only function under ultraviolet light. Therefore, it is necessary to find a new type of photocatalyst no matter from the perspective of perfecting the theory of photocatalytic degradation or from the aspect of practical application. . Recently, bismuth oxyhalide BiOX (X=Cl, Br, I) series semiconductor materials have attracted widespread attention because of their excellent performance in pigments, optics, electrochemistry, and especially catalytic performance...

AI Technical Summary

Problems solved by technology

However, organic or inorganic acids, organic solvents, and some special equipment are usually used in the above-mentioned preparation of BiOBr, and the use of these raw materials and experimental equipment will not only increase the preparation cost but also cause adverse effects on the environment. Mild preparation route still appears to be very necessary

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