Visible-light response vanadium-samarium composite oxide catalyst, preparation method thereof and application thereof

A composite oxide and catalyst technology, applied in the field of new visible light responsive catalyst and preparation, can solve the problem of low catalytic activity, achieve high visible light absorption ability, less harsh application conditions, and high visible light degradation activity.

Inactive Publication Date: 2010-06-23
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, according to the current research results, their catalytic activity under sunlight irradiation is not very high, and there are also some problems in terms of stability.

Method used

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  • Visible-light response vanadium-samarium composite oxide catalyst, preparation method thereof and application thereof
  • Visible-light response vanadium-samarium composite oxide catalyst, preparation method thereof and application thereof
  • Visible-light response vanadium-samarium composite oxide catalyst, preparation method thereof and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh 1.073 g of ammonium metavanadate, add 50 ml of deionized water, stir and dissolve in a water bath at 80° C., and obtain an ammonium metavanadate solution. Weigh 2.0 g of samarium oxide, add 3 ml of concentrated nitric acid and 7 ml of deionized water, stir and dissolve in a water bath at 80° C. to obtain a samarium nitrate solution. Then slowly add the samarium nitrate solution dropwise to the ammonium metavanadate solution under the condition of stirring to form a yellow precipitate. After stirring and aging for 2 hours, the water in the solution is removed by rotary evaporation, and the obtained solid is dried in an oven at 90°C. , and finally baked in a muffle furnace at 500°C for 4 hours. After natural cooling, the 0.8VSmO catalyst prepared by the precipitation method was obtained.

Embodiment 2

[0024] Weigh 1.342 g of ammonium metavanadate, add 50 ml of deionized water, stir and dissolve in a water bath at 80° C., and obtain an ammonium metavanadate solution. Weigh 2.0 g of samarium oxide, add 3 ml of concentrated nitric acid and 7 ml of deionized water, stir and dissolve in a water bath at 80° C. to obtain a samarium nitrate solution. Then slowly add the samarium nitrate solution dropwise to the ammonium metavanadate solution under the condition of stirring to form a yellow precipitate. After stirring and aging for 2 hours, the water in the solution is removed by rotary evaporation, and the obtained solid is dried in an oven at 90°C. , and finally baked in a muffle furnace at 500°C for 4 hours. After natural cooling, the 1.0VSmO catalyst prepared by the precipitation method was obtained.

Embodiment 3

[0026] Weigh 1.811 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 1.80 g of samarium oxide, add 2 ml of concentrated nitric acid and 8 ml of deionized water, stir and dissolve in a water bath at 80° C., and obtain a samarium nitrate solution. Then slowly add the samarium nitrate solution dropwise to the ammonium metavanadate solution under the condition of stirring to form a yellow precipitate. After stirring and aging for 2 hours, the water in the solution is removed by rotary evaporation, and the obtained solid is dried in an oven at 90°C. , and finally baked in a muffle furnace at 500°C for 4 hours. After natural cooling, the 1.5VSmO catalyst was prepared by precipitation method.

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Abstract

The invention discloses a high efficient visible-light response catalyst, which is characterized in that the catalyst is of a composite oxide, the chemical composition general formula is xVSmO, wherein x is n(V)/n(Sm), and x is more than 0.5 and less than 4.5. A preparation method for the catalyst comprises the following steps of: mixing samarium nitrate solution and ammonium metavanadate solution by stirring to obtain precipitate, then rotationally evaporating for removing water, and roasting the mixture in a muffle furnace at 300-700 DEG C after the mixture are dried in a baking oven. The invention has simple preparation technique; the prepared VSmO photocatalyst has excellent capability of catalyzing and oxidizing organic pollutants by visible light; after being loaded with precious metals, the photocatalytic activity and the deep oxidation capability of the catalyst can be obviously improved.

Description

【Technical field】 [0001] The invention relates to a novel visible light responsive catalyst, a preparation method and an application thereof. 【Background technique】 [0002] Environmental pollution is a major challenge facing mankind, seriously affecting people's health and quality of life. Therefore, how to purify environmental pollution economically and effectively is a major scientific challenge that we must face and solve. Among many environmental pollution control technologies, photocatalytic technology has become the most promising green environmental control technology in the 21st century due to its advantages of low cost, no pollution, and wide application range. [0003] Since Fujishima and Honda discovered TiO in 1972 2 Since the phenomenon that electrodes can decompose water under light has opened the prelude to photocatalysis research, many catalysts have been reported. Nano-TiO 2 It is one of the photocatalysts with the most application potential. It has the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/22B01J37/00B01J23/648B01J37/34B01J37/16B01J37/02A62D3/17A62D101/20A62D101/28
Inventor 何益明吴新涛盛天录陈建珊傅瑞彪胡胜民
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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