Method for preparing nanometer metal oxide/graphene composite photocatalyst

A graphene composite and nano-metal technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, nanotechnology, etc., can solve the problems of cumbersome preparation process, heavy accumulation, and affecting the catalytic efficiency of composite catalysts, and achieve high photocatalytic efficiency , good effect of particle controllability

Inactive Publication Date: 2011-08-24
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage is that the preparation process is cumbersome, and the distribution of titanium dioxide particles is not uniform, and it does not reach the nanoscale dispersion in the graphene layer.
There may even be agglomeration and heavy accumulation of graphene, which affects the catalytic efficiency of the composite catalyst

Method used

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  • Method for preparing nanometer metal oxide/graphene composite photocatalyst
  • Method for preparing nanometer metal oxide/graphene composite photocatalyst
  • Method for preparing nanometer metal oxide/graphene composite photocatalyst

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Experimental program
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Effect test

Embodiment 1

[0022] The first step, the concrete steps of preparing graphite oxide are as follows: add 2g graphite and 1g NaNO to the sulfuric acid solution of 98wt.% to the concentration of 60mL under ice-water bath 3 , stir and mix for 30min; add 3g KMnO 4 Into the above mixed solution, control the temperature at 10°C and stir for 1 h; then raise the temperature to 35°C and keep for 1 h; then add 60 mL of deionized water dropwise to the above mixed solution, and slowly raise the temperature to 100°C. Then add 5% H 2 o 2 solution, stirred for 1 h; centrifugally filtered, and washed several times with 5% HCl solution; after centrifugally filtered, vacuum-dried at 60° C. for 48 h, and then ground to obtain powdered graphite oxide.

[0023] The second step, the preparation of the precursor solution of titanium dioxide photocatalytic active material: under the condition of ice-water bath, ethanol, water, TiCl 4 Mix in a volume ratio of 30:10:1 and stir.

[0024] 0.25 g of graphite oxide w...

Embodiment 2

[0030] The first step, the specific steps of preparing graphite oxide are as follows: add 2g graphite and 1.5g NaNO in the sulfuric acid solution of 98wt.% to the concentration of 50mL under ice-water bath 3 , stir and mix for 45min and add 6g KMnO 4 Into the above mixed solution, control the temperature at 15°C and stir for 1 h; then raise the temperature to 35°C and keep for 1 h; then add 80 mL of deionized water dropwise to the above mixed solution, and slowly raise the temperature to 100°C. Then add 5% H 2 o 2 solution, stirred for 1.5 h; centrifugally filtered, and washed several times with 5% HCl solution; after centrifugally filtered, vacuum-dried at 70° C. for 48 h, and then ground to obtain powdered graphite oxide.

[0031] The second step, the preparation of the precursor solution of titanium dioxide photocatalytic active material: under the condition of ice-water bath, ethanol, water, TiCl 4 Mix in a volume ratio of 35:11:2 and stir.

[0032] 0.50 g of graphite ...

Embodiment 3

[0036] The first step, the specific steps of preparing graphite oxide are as follows: add 3g graphite and 1g NaNO in the sulfuric acid solution of 98wt.% to the concentration of 60mL under ice-water bath 3 , stir and mix for 60min; add 7g KMnO 4 Into the above mixed solution, control the temperature at 15°C and stir for 1h; then raise the temperature to 40°C and keep for 1h; then add 100mL deionized water dropwise to the above mixed solution, and slowly raise the temperature to 100°C. Then add 5% H 2 o 2 solution, stirred for 2 hours; centrifugally filtered, and washed several times with 5% HCl solution; after centrifugally filtered, vacuum-dried at 80° C. for 48 hours, and then ground to obtain powdered graphite oxide.

[0037] In the second step, the preparation of the photocatalytic active material precursor solution is as follows: under the condition of an ice-water bath, ethanol, water, TiCl 4 Mix in a volume ratio of 40:14:5 and stir.

[0038] 0.10 g of graphite oxid...

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Abstract

The invention provides a method for preparing nanometer metal oxide / graphene composite photocatalyst in the technical field of the photocatalyst. The photocatalyst is prepared by ultrasonically dispersing graphite oxide in titanium dioxide catalytic active substance precursor solution to prepare a compound, reducing the compound through hydrazine hydrate, and drying and roasting the compound in vacuum to prepare the catalyst. By the nanometer titanium dioxide / graphene composite photocatalyst prepared by the method has greatly improved photocatalysis by controlling sintering temperature.

Description

technical field [0001] The invention relates to a method for preparing a composite catalyst in the technical field of photocatalysis, in particular to a method for preparing a nanometer metal oxide / graphene composite photocatalyst. Background technique [0002] Graphene is a new type of carbon material that has been widely studied in recent years. It is a quasi-two-dimensional nanostructure of single-atom thickness of carbon. It is sp 2 A single-layer graphite sheet with a densely packed honeycomb lattice of carbon atoms. Studies have shown that graphene has excellent mechanical properties, electron transport capabilities, optical properties, thermal conductivity, etc., making it aroused high attention in the fields of mechanical materials, optoelectronic materials, and thermal conductive materials. [0003] Especially in terms of energy, the position occupied by graphene is becoming more and more important. First of all, because graphene has a unique two-dimensional plana...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06A62D3/10B82Y40/00B82Y30/00
Inventor 朱申敏郭晶晶张荻刘庆雷余自勇
Owner SHANGHAI JIAO TONG UNIV
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