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A graphene/in 2 o 3 /tio 2 Preparation method of composite photocatalyst

A graphene and composite light technology, which is applied in the field of photocatalysis and achieves the effects of high stability and catalytic activity, simple preparation method and low cost

Active Publication Date: 2017-02-22
SHANDONG WATER & WASTEWATER MONITORING CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But doping graphene into In 2 o 3 / TiO 2 There is no report on the test of improving its catalytic activity in the composite catalyst

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A graphene / In 2 o 3 / TiO 2 The preparation method of composite photocatalyst comprises the following preparation steps:

[0024] (1)In 2 o 3 / TiO 2 Preparation:

[0025] Prepare InCl 3 and Ti(SO 4 ) 2 Mixed solution 100mL, InCl 3 and Ti(SO 4 ) 2 Concentrations are 0.002mol / L and 0.02mol / L respectively, under ice-water bath conditions, the concentration is 10% NH 4 The OH solution was added dropwise to the above mixed solution until the pH of the mixed solution reached 8, the obtained precipitate was repeatedly washed with deionized water, and subjected to ultrasonic treatment for 30 minutes to obtain a mixed sol of hydroxides of two metals. Dry at room temperature under vacuum conditions, and bake the xerogel at 300 degrees Celsius to obtain In 2 o 3 / TiO 2 composite nanomaterials.

[0026] (2) Graphene / In 2 o 3 / TiO 2 Preparation:

[0027] Add 2mg graphene oxide to 20mL deionized water and 10mL ethanol mixed solution, sonicate for 1.2h, and 0.2g In ...

Embodiment 2

[0030] A graphene / In 2 o 3 / TiO 2 The preparation method of composite photocatalyst comprises the following preparation steps:

[0031] (1)In 2 o 3 / TiO 2 Preparation:

[0032] Prepare InCl 3 and Ti(SO 4 ) 2 Mixed solution 80mL, InCl 3 and Ti(SO 4 ) 2 Concentrations are 0.001mol / L and 0.02mol / L respectively, under ice-water bath conditions, the concentration is 12% NH 4 The OH solution was added dropwise to the above mixed solution until the pH of the mixed solution reached 9, and the obtained precipitate was repeatedly washed with deionized water and ultrasonically treated for 50 minutes to obtain a mixed sol of hydroxides of two metals. Dry at room temperature under vacuum conditions, and bake the xerogel at 350 degrees Celsius to obtain In 2 o 3 / TiO 2 composite nanomaterials.

[0033] (2) Graphene / In 2 o 3 / TiO 2 Preparation:

[0034] Add 2mg graphene oxide to 20mL deionized water and 10mL ethanol mixed solution, sonicate for 1.2h, and 0.16g In 2 o 3 ...

Embodiment 3

[0037] A graphene / In 2 o 3 / TiO 2 The preparation method of composite photocatalyst comprises the following preparation steps:

[0038] (1)In 2 o 3 / TiO 2 Preparation:

[0039] Prepare InCl 3 and Ti(SO 4 ) 2 Mixed solution 80mL, InCl 3 and Ti(SO 4 ) 2 Concentrations are 0.001mol / L and 0.019mol / L respectively, under ice water bath condition, the concentration is 15% NH 4 The OH solution was added dropwise to the above mixed solution until the pH of the mixed solution reached 8, the obtained precipitate was repeatedly washed with deionized water, and subjected to ultrasonic treatment for 50 minutes to obtain a mixed sol of hydroxides of two metals. Dry at room temperature under vacuum conditions, and bake the xerogel at 450 degrees Celsius to obtain In 2 o 3 / TiO 2 composite nanomaterials.

[0040] (2) Graphene / In 2 o 3 / TiO 2 Preparation:

[0041] 4mg of graphene oxide was added to 40mL of deionized water and 20mL of ethanol mixed solution, sonicated for 1.2...

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Abstract

The invention discloses a preparation method of a graphene / In2O3 / TiO2 composite photocatalyst. The preparation method comprises the following steps: dropwise adding an NH4OH solution to a mixed solution of InCl3 and Ti(SO4)2 to obtain a precipitate and washing with deionized water, carrying out ultrasonic treatment, drying, and calcinating to obtain an In2O3 / TiO2 composite nanomaterial; adding graphene oxide to a mixed solution of deionized water and ethanol, and carrying out ultrasonic treatment to obtain a graphene oxide mixed solution; adding In2O3 / TiO2 to the graphene oxide mixed solution, magnetically stirring, holding for 3 hours at temperature of 120 DEG C in a closed tetrafluoroethylene high pressure vessel to obtain a solid, washing and drying to obtain a graphene / In2O3 / TiO2 composite photocatalyst. The catalyst can be used for enlarging the response range to light, has strong utilization capability to visible light, and has high stability and catalytic activity. The preparation method is simple, is low in cost, and is environment-friendly, and no secondary pollution is generated in catalytic degradation.

Description

technical field [0001] The invention relates to a preparation method of a photocatalyst, in particular to a graphene / In 2 o 3 / TiO 2 The invention discloses a method for preparing a composite photocatalyst, belonging to the field of photocatalysis. Background technique [0002] At present, the semiconductor metal oxide TiO 2 , ZnO, ZrO 2 , ZnS, In 2 o 3 、WO 3 Photocatalytic oxidation degradation of organic pollutants has become a hot field of environmental research. TiO 2 With the advantages of non-toxicity, good chemical stability, simple preparation method and strong resistance to photochemical corrosion, it is widely used in photocatalytic degradation of organic pollutants. In order to improve the TiO 2 photocatalytic activity, the researchers combined other oxide semiconductors with TiO 2 Combined, e.g. ZnO, ZrO 2 , ZnS and NiO, etc. to obtain TiO 2 composite catalyst. However, ZnO, ZrO 2 The band gaps of ZnS, ZnS, and NiO are 3.2eV, 5eV, 3.6eV, and 3.5eV,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/08
Inventor 贾瑞宝姚振兴孙韶华王明泉
Owner SHANDONG WATER & WASTEWATER MONITORING CENT
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