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Photocatalyst for degrading organic pollutant and preparation method thereof

A technology of organic pollutants and photocatalysts, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of large-scale application, low solar energy utilization, Problems such as limitations in the scope of use, to achieve high commercial application prospects, high ability to absorb visible light, and the effect of not harsh application conditions

Inactive Publication Date: 2009-06-24
ZHEJIANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Photocatalyst for degrading organic pollutant and preparation method thereof
  • Photocatalyst for degrading organic pollutant and preparation method thereof
  • Photocatalyst for degrading organic pollutant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Weigh 0.777g of ammonium metavanadate, add 50ml of deionized water, stir and dissolve in an 80°C water bath, and obtain an ammonium metavanadate solution. Weigh 2.50 g of yttrium oxide, add 5 ml of concentrated nitric acid and 7 ml of deionized water, stir and dissolve in a water bath at 80° C. to obtain a yttrium nitrate solution. Then slowly drop the yttrium nitrate solution into the ammonium metavanadate solution under the condition of stirring to form a yellow precipitate, stir and age for 2 hours and then remove the water in the solution by rotary evaporation, and the obtained solid is dried in an oven at 90°C Dry, and finally bake in a muffle furnace at 500°C for 4 hours. After natural cooling, the V prepared by precipitation method was obtained. 0.3 Y 1 o 2.25 catalyst.

Embodiment 2

[0022] Weigh 1.657g of ammonium metavanadate, add 50ml of deionized water, stir and dissolve in an 80°C water bath, and obtain an ammonium metavanadate solution. Weigh 2.0 g of yttrium oxide, add 4 ml of concentrated nitric acid and 7 ml of deionized water, stir and dissolve in a water bath at 80° C. to obtain a yttrium nitrate solution. Then slowly drop the yttrium nitrate solution into the ammonium metavanadate solution under the condition of stirring to form a yellow precipitate, stir and age for 2 hours, then remove the water in the solution by rotary evaporation, and dry the obtained solid in an oven at 90°C , and finally baked in a muffle furnace at 500°C for 4 hours. After natural cooling, the V prepared by precipitation method was obtained. 0.8 Y 1 o 3.5 catalyst.

Embodiment 3

[0024] Weigh 1.554 g of ammonium metavanadate, add 60 ml of deionized water, stir and dissolve in a water bath at 80° C., and obtain an ammonium metavanadate solution. Weigh 1.50 g of yttrium oxide, add 3 ml of concentrated nitric acid and 8 ml of deionized water, stir and dissolve in a water bath at 80° C. to obtain a yttrium nitrate solution. Then slowly drop the yttrium nitrate solution into the ammonium metavanadate solution under the condition of stirring to form a yellow precipitate, stir and age for 2 hours, then remove the water in the solution by rotary evaporation, and dry the obtained solid in an oven at 90°C , and finally baked in a muffle furnace at 500°C for 4 hours. After natural cooling, the V prepared by precipitation method was obtained. 1 Y 1 o 4 catalyst.

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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 [0001] 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 [0002] 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/22B01J23/648A62D3/17A62D101/20
Inventor 何益明赵雷洪吴瑛吴新涛盛天录
Owner ZHEJIANG NORMAL UNIVERSITY
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