Photocatalyst for degrading organic pollutant and preparation method thereof

Abstract

The invention relates to a photocatalyst for degrading organic pollutants and a preparation method thereof. The photocatalyst is vanadium-yttrium composite oxide, a general formula of chemical composition is VxY1O(2.5x+1.5), and x is vanadium-yttrium mol ratio, and is more than or equal to 0.3 and is less than or equal to 3.5. The preparation method for the photocatalyst comprises the following steps that: a yttrium nitrate solution and an ammonium metavanadate solution are mixed to generate a precipitate under the condition of stirring according to the vanadium-yttrium mol ratio; and the precipitate is aged through the stirring and then is evaporated to remove moisture, an obtained solid is dried and finally is baked at a temperature of between 400 and 600 DEG C, and a finished photocatalyst product is obtained after the cooling. The invention also relates to a catalyst for precious metal Pt supported by V1.5Y1O5.25 composite oxide and a preparation method thereof. The photocatalyst has the advantages of simple preparation method and low cost, good visible light degradation property to the organic pollutants, and higher commercial application prospect.

Description

technical field The invention relates to a photocatalyst responsive to visible light, in particular to a photocatalyst for degrading organic pollutants and a preparation method thereof. Background technique In the 20th century, the rapid economic growth and large-scale industrial production brought negative effects——the worsening of the earth's ecological environment. Pesticides, alkylphenols and other environmental hormones and odorous substances in water and air seriously threaten people's safe and comfortable life. At present, the governments of various countries have been fully aware of the seriousness of environmental problems, and have elevated environmental purification and energy development to a strategic level that is related to the survival and development of the country. Therefore, research and technology development in this area have attracted much attention. Among many environmental pollution control technologies, photocatalytic technology is a brand-new "gree...

AI Technical Summary

Problems solved by technology

Its disadvantages are: due to the wide band gap (3.2eV) of titanium dioxide, the light absorption range is limited to the ultraviolet region, and the utilization rate of solar energy is too low (about 4%), which limits its large-scale application

Photosensitized catalysts are limited by the scope of use

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