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Preparation method of mesoporous tungsten trioxide/reduction-oxidation graphene composite photocatalyst

A technology of tungsten trioxide and photocatalyst, which is applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, chemical instrument and method, etc., can solve the problem of low utilization rate of light energy and achieve repeatable High utilization rate, high conductivity, and the effect of expanding the application range

Active Publication Date: 2015-06-24
NANTONG VOCATIONAL COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is mainly to solve the problem of low light energy utilization rate of tungsten trioxide, improve the catalytic activity of photocatalyst, and expand the application range of photocatalyst

Method used

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specific Embodiment 1

[0015] A preparation method of mesoporous tungsten trioxide / reduced graphene oxide composite photocatalyst, comprising the following steps:

[0016] 1) Preparation of mesoporous tungsten trioxide using m-WO 3 express

[0017] Dissolve 1.0 g of KIT-6 as a silicon-based template in ethanol, stir at 1000 rpm for 30 min, add 3.0 g of phosphotungstic acid to the solution, continue stirring for 2 h, and then evaporate the solvent to dryness at 20-30 °C to obtain a white powder , the obtained product was calcined at 550°C for 5h, the silicon substrate was removed with HF, the product was obtained by filtration, washed 2-3 times with a mixture of deionized water and ethanol, filtered, and dried at 110°C for 1h to obtain the product m-WO 3 , ready for use;

[0018] 2) Preparation of graphene oxide, represented by GO

[0019] Disperse 1.0g graphite powder (3 , 24.0mL H 2 SO 4 and 3.0g KMnO 4 , put the reaction solution in an ice bath, stir vigorously for 30min, then take it out an...

specific Embodiment 2

[0022] A preparation method of mesoporous tungsten trioxide / reduced graphene oxide composite photocatalyst, comprising the following steps:

[0023] 1) Preparation of mesoporous tungsten trioxide using m-WO 3 express

[0024] Dissolve 1.0 g of KIT-6 as a silicon-based template in ethanol, stir at 1000 rpm for 30 min, add 3.0 g of phosphotungstic acid to the solution, continue stirring for 2 h, and then evaporate the solvent to dryness at 20-30 °C to obtain a white powder , the obtained product was calcined at 550°C for 5h, the silicon substrate was removed with HF, the product was obtained by filtration, washed 2-3 times with a mixture of deionized water and ethanol, filtered, and dried at 110°C for 1h to obtain the product m-WO 3 , ready for use.

[0025] 2) Preparation of graphene oxide, represented by GO

[0026] Disperse 1.0g graphite powder (3 , 24.0mL H 2 SO 4 and 3.0g KMnO 4 , put the reaction solution in an ice bath, stir vigorously for 30min, then take it out an...

specific Embodiment 3

[0029] A method for preparing a mesoporous tungsten trioxide / reduced graphene oxide composite photocatalyst, comprising the following steps:

[0030] 1) Preparation of mesoporous tungsten trioxide, using m-WO 3 express

[0031] Take 1.0g of KIT-6 as a silicon-based template and dissolve it in ethanol, stir at 1000rpm for 30min, then add 3.0g of phosphotungstic acid to the solution, continue to stir for 2h, then evaporate the solvent to dryness at 20-30°C to obtain a white powder , roast the obtained product at 550°C for 5h, remove the silicon substrate with HF, filter to obtain the product, wash with deionized water and ethanol mixture for 2-3 times, filter, and dry at 110°C for 1h to obtain the product m-WO 3 , ready to use.

[0032] 2) Preparation of graphene oxide, represented by GO

[0033] Take 1.0g graphite powder (3 , 24.0mL H 2 SO 4 and 3.0 g KMnO 4 , put the reaction solution in an ice bath, stir vigorously for 30 minutes, then take it out and continue stirring ...

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Abstract

The invention discloses a preparation method of a mesoporous tungsten trioxide / reduction-oxidation graphene composite photocatalyst. The preparation method comprises the steps of firstly, preparing mesoporous tungsten trioxide; secondly, preparing oxidized graphene; and thirdly, preparing the mesoporous tungsten trioxide / reduction-oxidation graphene composite photocatalyst. The method can effectively widen the photoresponse range of the tungsten trioxide photocatalyst and remarkably improve the light energy conversion efficiency of the tungsten trioxide photocatalyst under sunlight so as to further widen the application range of the tungsten trioxide photocatalyst. The mesoporous tungsten trioxide / reduction-oxidation graphene composite photocatalyst can rapidly and effectively decompose water to produce oxygen, has high repeating utilization factor, is harmless to environment, and has highly-efficient and environment-friendly effects.

Description

technical field [0001] The invention relates to the field of semiconductor photocatalyst preparation, in particular to a preparation method of a mesoporous tungsten trioxide / reduced graphene oxide composite photocatalyst capable of decomposing water to produce oxygen. Background technique [0002] With the increasingly prominent world energy crisis, seeking green and environmentally friendly new energy has become an urgent task. Using solar energy to photocatalyze water splitting to produce hydrogen or oxygen is one of the effective methods to solve the problems of energy shortage and environmental pollution. Semiconductor photocatalysts such as TiO 2 , Nb 2 O 5 , ZnO, and WO 3 The photolysis of water has become one of the research hotspots. [0003] Recently, tungsten trioxide (WO 3 ) as a typical n-type semiconductor photocatalyst has received much attention, mainly because WO 3 It has the advantages of strong light absorption ability, high thermal stability and phy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/30B01J35/10C01B3/04
CPCY02E60/36
Inventor 黄徽王璐周君严进
Owner NANTONG VOCATIONAL COLLEGE
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