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Cu-doped ZnO/graphene composite photocatalyst and preparation method thereof

A graphene composite and photocatalyst technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems such as constraints, achieve good application prospects, uniform grain size distribution, and promote adsorption Effect

Inactive Publication Date: 2013-07-03
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the application of carbon material composite ZnO catalyst is limited by the cost of carbon nanotubes

Method used

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  • Cu-doped ZnO/graphene composite photocatalyst and preparation method thereof
  • Cu-doped ZnO/graphene composite photocatalyst and preparation method thereof
  • Cu-doped ZnO/graphene composite photocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh 10mg of graphite oxide and 0.219g of cetyltrimethylammonium bromide and mix them in 20ml of water, and process them in an ultrasonic machine with a frequency of 40KHz and a power of 120W for 30 minutes to obtain a precursor reactant one; 3.951g of zinc acetate and 0.3993g of copper acetate was dissolved in 80ml of distilled water, and ultrasonically treated for 20 minutes to obtain precursor reactant II; 2.243g of hexamethylenetetramine and 0.4705g of sodium citrate were dissolved in 100ml of distilled water, and ultrasonically treated for 20 minutes to obtain precursor Reactant three.

[0027] Precursor reactant 1 and precursor reactant 2 were mixed, and after being ultrasonically treated for 10 minutes, they were poured into a three-necked flask. Pour the precursor reactant three into the constant pressure funnel. The three-neck flask and the constant pressure funnel were placed in a constant temperature magnetic stirring oil bath to allow the reactants in the ...

Embodiment 2

[0030] Weigh 15mg of graphite oxide and 0.323g of hexadecyltrimethylammonium bromide, mix them in 15ml of distilled water, and ultrasonically treat them for 40 minutes to obtain precursor reactant 1; dissolve 3.951g of zinc acetate and 0.1997g of copper acetate in 80ml of In distilled water, sonicate for 30 minutes to obtain precursor reactant 2; dissolve 2.243 g of hexamethylenetetramine and 0.4705 g of sodium citrate in 100 ml of distilled water, and sonicate for 20 minutes to obtain precursor reactant 3.

[0031] The precursor reactant 1 and the precursor reactant 2 were mixed, treated in an ultrasonic machine with a frequency of 40KHz and a power of 120W for 30 minutes, and poured into a three-necked flask. Pour the precursor reactant three into the constant pressure funnel. The three-neck flask and the constant pressure funnel were placed in a constant temperature magnetic stirring oil bath to allow the reactants in the two to react. The temperature of the oil bath was c...

Embodiment 3

[0034] Weigh 20mg of graphite oxide and 0.427g of hexadecyltrimethylammonium bromide, mix them in 20ml of distilled water, and ultrasonicate for 40 minutes to obtain precursor reactant 1; dissolve 3.951g of zinc acetate and 0.2995g of copper acetate in 80ml of distilled water , sonicate for 30 minutes to obtain precursor reactant 2; dissolve 4.486 g of hexamethylenetetramine and 0.4705 g of sodium citrate in 100 ml of distilled water, and sonicate for 20 minutes to obtain precursor reactant 3.

[0035] The precursor reactant 1 and the precursor reactant 2 were mixed, treated in an ultrasonic machine with a frequency of 40KHz and a power of 120W for 30 minutes, and poured into a three-necked flask. Pour the precursor reactant three into the constant pressure funnel. The three-neck flask and the constant pressure funnel were placed in a constant temperature magnetic stirring oil bath to allow the reactants in the two to react. The temperature of the oil bath is controlled at 12...

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Abstract

The invention discloses a Cu-doped ZnO / graphene composite photocatalyst and a preparation method thereof. The method comprises the following steps: mixing graphite oxide and a surfactant CTAB (cetyl trimethyl ammonium bromide) in distilled water and carrying out ultrasonic treatment to obtain a first precursor reactant; dissolving zinc acetate and cupric acetate in the distilled water and carrying out ultrasonic treatment to obtain a second precursor reactant; dissolving hexamethylenetetramine and sodium citrate in the distilled water and carrying out ultrasonic treatment to obtain a third precursor reactant; after mixing the first precursor reactant and the second precursor reactant, carrying out ultrasonic treatment, then mixing the obtained product and the third precursor reactant, controlling reaction temperature in the range of 70 DEG C to 120 DEG C and performing reaction; sealing, naturally cooling, standing and carrying out extraction filtration to obtain filter residues; and after drying the filter residues, carrying out annealing treatment. According to the invention, addition of graphene reduces electron-hole compounding possibility; and meanwhile, introduction of Cu ions can be used as an ion trap to temporarily capture a charge carrier and inhibit electron-hole compounding so as to obviously improve photocatalytic efficiency of the product.

Description

technical field [0001] The invention relates to a graphene composite photocatalyst in the technical field of novel photocatalysts, in particular to a method for preparing a Cu-doped ZnO (ZnO:Cu) / graphene composite photocatalyst. Background technique [0002] Photocatalytic degradation of water and air pollutants using oxide semiconductors is a hotspot in catalyst research. with TiO 2 Oxide semiconductors represented by ZnO and ZnO can effectively degrade and even mineralize toxic organic pollutants that are refractory to biodegradation under normal temperature and pressure conditions, and they are cheap, efficient, and do not produce secondary pollutants, which is the most widely studied at present. Photocatalyst TiO 2 In contrast, ZnO is more responsive to light and exhibits higher quantum yields in the degradation of certain toxic organic pollutants. However, due to the limitation of the band gap of ZnO itself, the electron-hole pairs generated by light irradiation are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/80B01J37/34
Inventor 黄敏兴张弜
Owner SOUTH CHINA UNIV OF TECH
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