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Preparation method of ZnO/graphene oxide composite photocatalysis material

A photocatalytic material and graphene composite technology, which is applied in the field of preparation of ZnO/graphene oxide composite photocatalytic materials, can solve the problems of unreported research on high-efficiency nano-photocatalytic materials, and achieve improved photocatalytic activity and adsorption performance , the effect of excellent photocatalytic performance

Active Publication Date: 2016-04-06
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there has been no report on the preparation of high-efficiency nano-photocatalytic materials by combining ZnO with PAMAM dendrimer-modified graphene

Method used

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  • Preparation method of ZnO/graphene oxide composite photocatalysis material
  • Preparation method of ZnO/graphene oxide composite photocatalysis material
  • Preparation method of ZnO/graphene oxide composite photocatalysis material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Disperse 1.0g of graphene oxide in 10ml of N,N-dimethylformamide, and ultrasonically treat it for 1h to obtain a graphene oxide (GO-COOH) dispersion;

[0023] (2) Mix the above-mentioned graphene oxide dispersion with 60ml thionyl chloride (SOCl 2 ) solutions were mixed, then heated to 70°C, and reacted for 72h under stirring. After the reaction, centrifuged, the solid was washed 3 times with anhydrous tetrahydrofuran (THF), and then vacuum-dried at 60°C for 24h to obtain acyl chloride graphite oxide Alkenes (GO-COCl);

[0024] (3) Disperse the above acid-chlorinated graphene oxide (GO-COCl) in 60ml of N,N-dimethylformamide, ultrasonically treat for 30min, add 6g of ethylenediamine, and react at 0°C for 4h. After the reaction, pump Remove the solvent by filtration, wash the solid matter with absolute ethanol 3 times, remove unreacted ethylenediamine, wash 3 times with distilled water, and dry in vacuum at 30°C for 24 hours to obtain ethylenediamine-modified graphen...

Embodiment 2

[0037] (1) Disperse 1.0 g of graphene oxide in 40 ml of N,N-dimethylacetamide (DMAC), and ultrasonically treat it for 2 hours to obtain a graphene oxide (GO-COOH) dispersion;

[0038] (2) Mix the above-mentioned graphene oxide dispersion with 100ml thionyl chloride (SOCl 2 ) solutions were mixed, heated to 80°C, and reacted for 24 hours under stirring. After the reaction, centrifuged, the solid was washed with N,N-dimethylacetamide (DMAC) for 5 times, and then vacuum-dried at 80°C for 12 hours. Obtain graphene oxide (GO-COCl) of acid chloride;

[0039] (3) Disperse the above acid-chlorinated graphene oxide (GO-COCl) in 100ml of N,N-dimethylacetamide, ultrasonically treat for 60min, add 10g of ethylenediamine, react at 5°C for 2h, after the reaction, pump Remove the solvent by filtration, wash the solid matter with absolute ethanol 5 times, remove unreacted ethylenediamine, wash 5 times with distilled water, and dry in vacuum at 60°C for 12 hours to obtain ethylenediamine-modi...

Embodiment 3

[0045] (1) Disperse 1.0g of graphene oxide in 30ml of N,N-dimethylacetamide, and ultrasonically treat it for 1.5h to obtain a graphene oxide (GO-COOH) dispersion;

[0046] (2) Mix the above-mentioned graphene oxide dispersion with 80ml thionyl chloride (SOCl 2 ) solutions were mixed, then heated to 75°C, and reacted for 48h under stirring. After the reaction was completed, centrifuged, the solid was washed 4 times with anhydrous tetrahydrofuran (THF), and then vacuum-dried at 70°C for 18h to obtain acyl chloride graphite oxide Alkenes (GO-COCl);

[0047] (3) Disperse the above acid-chlorinated graphene oxide (GO-COCl) in 80ml of N,N-dimethylacetamide, ultrasonically treat for 40min, add 8.0g of ethylenediamine, and react at 2°C for 3h. After the reaction, Remove the solvent by suction filtration, wash the solid matter 4 times with absolute ethanol, remove unreacted ethylenediamine, wash 4 times with distilled water, and dry in vacuum at 40°C for 18 hours to obtain ethylenedia...

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Abstract

The invention provides a preparation method of a ZnO / graphene oxide composite photocatalysis material. The ZnO / graphene oxide composite photocatalysis material is a ZnO / PAMAM / graphene oxide composite material. The preparation method of the ZnO / graphene oxide composite photocatalysis material comprises the following steps: introducing amino groups to the surface of graphene oxide, forming PAMAM dendrimers on the surface of graphene oxide through using a Michael addition reaction of methyl acrylate and ethylene diamine, and forming ZnO on the surface of the PAMA dendrimer modified graphene oxide in an in situ manner by using the coordination between Zn<2+> and tertiary amino groups and amido groups on the PAMAM and hydroxyl groups and carboxyl groups on the surface of graphene oxide. The composite material prepared in the invention has excellent adsorption performance and photocatalytic activity on common organic pollutants.

Description

technical field [0001] The invention belongs to the field of new materials, and in particular relates to a preparation method of a ZnO / graphene oxide composite photocatalytic material. Background technique [0002] Nano-zinc oxide (nano-ZnO), as an important semiconductor photocatalytic material, shows good application prospects in the photocatalytic degradation of organic pollutants. In the process of photocatalytic reaction, the adsorption performance of photocatalytic materials to organic pollutants directly affects the photocatalytic efficiency of materials. Graphene is a two-dimensional honeycomb lattice structure carbonaceous material composed of a single layer of carbon atoms tightly packed. It has a unique structure and can form п-п conjugates with organic pollutants with benzene rings. , and has a huge specific surface area, and has excellent adsorption properties for common organic pollutants. Dendrimers represented by polyamide-amine (PAMAM) are a new type of po...

Claims

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Application Information

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IPC IPC(8): B01J31/26B01J35/10C02F1/32C02F101/38
CPCC02F1/32B01J31/26C02F2101/40B01J35/60
Inventor 彭勇刚纪俊玲陶永新
Owner CHANGZHOU UNIV
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