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F and N co-doped visible-light response bismuth vanadate photocatalyst and preparation method thereof

A photocatalyst and co-doping technology, which is applied in the field of inorganic environmental photocatalytic materials, can solve the problems of long migration distance of photogenerated electron holes, limited application, easy recombination and deactivation, etc., and achieves low cost, simple preparation method and excellent catalytic performance. performance effect

Inactive Publication Date: 2014-01-15
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of F, N co-doped visible light responsive bismuth vanadate photocatalyst, has solved existing pure bismuth vanadate photocatalyst photogenerated electron hole migration distance is long and causes recombination deactivation easily, thereby limits Problems of its application in the field of photocatalysis

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 2.43g bismuth nitrate pentahydrate is dissolved in 12.15g concentration and is the nitric acid solution of 65%; It is the sodium hydroxide solution of 5mol / L that 0.585g ammonium metavanadate solution is in 17.55g concentration; Above-mentioned two kinds of solutions are mixed and moved to Hydrothermal reaction kettle, and placed in a microwave reactor, heated to 150°C by microwave for 0.5h of microwave hydrothermal treatment, taken out, cooled to room temperature naturally, centrifuged, washed with deionized water for 3 times, and dried at 80°C for 12h , to obtain bismuth vanadate powder. Weigh 1.62g of bismuth vanadate powder, 50mL of sodium fluoride solution with a concentration of 0.001mol / L, and 50mL of ammonium bicarbonate solution with a concentration of 0.001mol / L, mix them evenly, transfer them to a hydrothermal reaction kettle, and place them in a microwave reactor Heated by microwave to 150°C for 0.5h with microwave hydrothermal treatment, took it out and coo...

Embodiment 2

[0028] 2.43g bismuth nitrate pentahydrate is dissolved in 12.15g concentration and is the nitric acid solution of 65%; It is the sodium hydroxide solution of 5mol / L that 0.585g ammonium metavanadate solution is in 17.55g concentration; Above-mentioned two kinds of solutions are mixed and moved to A hydrothermal reaction kettle, and placed in a microwave reactor, heated to 250°C by microwave for 3h, then cooled to room temperature naturally, and the obtained product was centrifuged, washed with deionized water for 3 times, and dried at 80°C for 12h. Bismuth vanadate powder was obtained. Weigh 16.2g of bismuth vanadate powder, 50mL of sodium fluoride solution with a concentration of 0.1mol / L, and 50mL of ammonium bicarbonate solution with a concentration of 0.1mol / L, mix them evenly, transfer them to a hydrothermal reaction kettle, and place them in a microwave reactor Heated by microwave to 150°C for 0.5h with microwave hydrothermal treatment, took it out and cooled it down to ...

Embodiment 3

[0030]2.43g bismuth nitrate pentahydrate is dissolved in 24.3g concentration and is the nitric acid solution of 65%; It is the sodium hydroxide solution of 5mol / L that 0.585g ammonium metavanadate solution is in 29.25g concentration; Above-mentioned two kinds of solutions are mixed and moved to Hydrothermal reaction kettle, and placed in a microwave reactor, heated to 150°C by microwave for 0.5h of microwave hydrothermal treatment, taken out, cooled to room temperature naturally, centrifuged, washed with deionized water for 3 times, and dried at 80°C for 12h , to obtain bismuth vanadate powder. Weigh 1.62g of bismuth vanadate powder, 50mL of sodium fluoride solution with a concentration of 0.001mol / L, and 50mL of ammonium bicarbonate solution with a concentration of 0.001mol / L, mix them evenly, transfer them to a hydrothermal reaction kettle, and place them in a microwave reactor Heated by microwave to 150°C for 0.5h with microwave hydrothermal treatment, took it out and coole...

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Abstract

The invention discloses an F and N co-doped visible-light response bismuth vanadate photocatalyst and a preparation method thereof; a chemical composition general formula of the photocatalyst is as follows: BiVO(4-x-y)FxNy, wherein x is greater than or equal to 0.01 and is less than or equal to 0.1, and x is greater than or equal to 0.01 and is less than or equal to 0.1; the preparation method comprises the following steps of: preparing bismuth vanadate powder by adopting a microwave auxiliary heating hydro-thermal method; introducing F and N into the bismuth vanadate powder in forms of soluble fluoride and soluble ammonium salt, and obtaining the F and N co-doped visible-light response bismuth vanadate photocatalyst after secondary microwave auxiliary hydro-thermal treatment of the obtained bismuth vanadate powder. The photocatalyst prepared by the invention has visible-light response capacity and can degrade toxic and organic pollutants in a photocatalytic manner in high efficiency under the irradiation of visible-light.

Description

technical field [0001] The invention belongs to the technical field of inorganic environment-friendly photocatalytic materials, and specifically relates to a photocatalyst, in particular to an F and N co-doped visible light-responsive bismuth vanadate photocatalyst, and the invention also relates to a preparation method of the photocatalyst. Background technique [0002] The use of photocatalytic technology to degrade environmental pollutants has the characteristics of deep reaction at room temperature and direct use of solar energy as a light source to drive the reaction. It has become an ideal environmental pollution control technology and has attracted much attention. In recent years, semiconductor photocatalysis has become one of the research hotspots in the environmental field. A large number of studies have shown that almost all organic pollutants can be effectively photocatalytically degraded, decolorized, and mineralized into small inorganic molecules, thereby elimina...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24
Inventor 李军奇朱振峰刘辉何选盟王德方郭占云
Owner SHAANXI UNIV OF SCI & TECH