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Tungsten oxide/bismuth oxide mesh-sheet composite material as well as preparation method and application thereof

A technology for composite materials and bismuth oxide, which is applied in the field of tungsten oxide/bismuth oxide mesh-sheet composite materials and its preparation, can solve the problems of weakening the attraction of W atoms, slow migration rate of photogenerated carriers, and poor reduction performance.

Active Publication Date: 2020-02-28
湖南信力新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

{[BiO] + -WO 4 2- } with {WO 4 2- -[BiO] + } weakens the gravitational force of W atoms, resulting in slower mobility of photogenerated carriers and easy recombination of carriers
In addition, CO 2 The reduction reaction sites are only distributed in the Bi 2 WO 6 Middle WO 4 2- The edge position of the layer, the restoration performance is poor

Method used

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  • Tungsten oxide/bismuth oxide mesh-sheet composite material as well as preparation method and application thereof
  • Tungsten oxide/bismuth oxide mesh-sheet composite material as well as preparation method and application thereof
  • Tungsten oxide/bismuth oxide mesh-sheet composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1 WO 3 Preparation of nano photocatalytic materials

[0021] Weigh 0.5g sodium tungstate dihydrate and 0.3g citric acid monohydrate into a beaker, add 30mL deionized water and stir until completely dissolved, add 6mol L dropwise -1 hydrochloric acid solution to adjust the pH value of the solution to 1, and continue to stir for 1 hour until a yellow suspension is obtained, then transfer the obtained suspension to a 50mL reaction kettle, put it in an oven, and conduct a hydrothermal reaction at 120°C for 12 hours; wait for natural cooling to After room temperature, wash with deionized water and absolute ethanol three times, and dry at 60°C after centrifugation. Take it out, grind it into powder with a mortar, transfer it into a semi-closed crucible, and then transfer it to a temperature-programmed tube furnace for calcination at 500°C for 2h.

Embodiment 2

[0022] Example 2 Bi 2 o 3 Preparation of nano photocatalytic materials

[0023] 1.46g Bi(NO 3 ) 3 ·5H 2 O was added to 51mL ethanol and 25.5mL ethylene glycol, stirred for 1h, the mixture was poured into an 80mL reaction kettle, and reacted at 160°C for 5h, the sample was centrifuged, washed with deionized water and ethanol three times, and dried at 60°C for 12h to obtain powder sample.

Embodiment 3

[0024] Example 3 WO 3 / Bi 2 o 3 Preparation of composite nano photocatalytic materials

[0025] 0.1649g Na 2 WO 4 2H 2 O,0.4650g Bi(NO 3 ) 3 ·5H 2 O, 0.025g CTAB was dissolved in 40mL deionized water. After stirring for 30 min, the mixed solution was poured into an 80 mL reactor and heated at 180 °C for 12 h. After the reaction was completed, the obtained sample was centrifuged and washed 3 times with deionized water and absolute ethanol. Finally, the sample was dried at 60°C for 12 hours to obtain a powder sample.

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Abstract

The invention relates to a tungsten oxide / bismuth oxide mesh-sheet composite material as well as a preparation method and application thereof, and belongs to the technical field of material preparation and photocatalysis. Bi2O3 / WO3 photocatalyst with chemical bond heterojunctions is prepared by adopting in-situ synthesis method. According to the sample synthesis, reaction is terminated in the halfway, and the composite photocatalyst is formed. The raw materials of the composite photocatalyst are cheap, the synthesis method is simple, and the prepared composite photocatalyst has the advantagesof stable physicochemical properties, no toxicity and the like. The activity of photocatalytic reduction on CO2 is high, the production process is green and environmentally friendly, a new thought isprovided for sustainable development and production of new energy, and industrial production is expected.

Description

technical field [0001] The invention relates to a tungsten oxide / bismuth oxide mesh-sheet composite material, a preparation method and an application, and belongs to the technical fields of material preparation and photocatalysis. Background technique [0002] Harnessing renewable solar energy for CO 2 Photocatalytic reduction is an important means to alleviate the greenhouse effect, fuel shortage and other problems. Photocatalytic reduction of CO 2 It can bring us huge environmental protection and resource regeneration benefits. Currently, TiO 2 , g-C 3 N 4 , ZnO, etc. have been widely reported. However, most of them have the disadvantages of high recombination rate of photogenerated carriers and no response to visible light. Therefore, it is of great significance to develop a photocatalyst that responds to visible light and has a low recombination rate of photogenerated carriers. [0003] The interface of different semiconductors connected by chemical bonds can fac...

Claims

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Application Information

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IPC IPC(8): B01J23/31B01J35/10C01B32/40
CPCB01J23/31B01J23/002C01B32/40B01J35/39B01J35/60
Inventor 陈敏解仲凯姜德立李娣孟素慈徐菁
Owner 湖南信力新材料有限公司