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Graphene doped Cu/Cu2O nano photocatalytic coating and preparation method thereof

A catalytic coating, graphene technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem that photolysis research is rarely reported, etc. The effect of strong visible light response, enhanced light absorption, good degradation effect

Active Publication Date: 2019-11-29
FUJIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Photolysis is the main pathway for the degradation of methyl orange and phenol in aqueous environments, but there are few reports on the photolysis of methyl orange and phenol by graphene-doped Cu / Cu2O nanophotocatalytic coatings.

Method used

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Examples

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Comparison scheme
Effect test

preparation example Construction

[0022] A graphene-doped Cu / Cu 2 The preparation method of O nano photocatalytic coating, comprises the following steps:

[0023] 1) Pre-treat the workpiece to clean off the dust, grease and rust on the surface of the workpiece;

[0024] 2) Preparation of graphene-doped Cu / Cu 2 O composite slurry: (1) take Cu 2 O powder is dispersed in alcohol aqueous solution, and ultrasonic treatment is carried out under the condition of magnetic stirring; (2) after the ultrasonic is finished, add adhesive solution and Cu powder, continue to stir evenly; (3) dropwise add graphene oxide powder, the solution continues Magnetically stirred evenly to obtain graphene-doped Cu / Cu 2 O composite slurry;

[0025] Among them, Cu 2 The mass ratio of O powder, Cu powder, graphene oxide powder is 75:20:5, and binder solution is the polyvinyl alcohol aqueous solution or the epoxy polyester powder coating that mass percent is 3-5%;

[0026] 3) The above-mentioned slurry is pressed on the surface of th...

Embodiment 1

[0030] A graphene-doped Cu / Cu 2 The preparation method of O nano photocatalytic coating, comprises the following steps:

[0031] 1) Pre-treat the workpiece to clean off the dust, grease and rust on the surface of the workpiece;

[0032] 2) Preparation of graphene-doped Cu / Cu 2 O composite slurry: (1) take Cu 2 O powder is dispersed in alcohol aqueous solution, and ultrasonic treatment is carried out under the condition of magnetic stirring; (2) after the ultrasonic is finished, add adhesive solution and Cu powder, continue to stir evenly; (3) dropwise add graphene oxide powder, the solution continues Magnetically stirred evenly to obtain graphene-doped Cu / Cu 2 O composite slurry;

[0033] Among them, Cu 2 The mass ratio of O powder, Cu powder, graphene oxide powder is 75:20:5, and binder solution is the polyvinyl alcohol aqueous solution that mass percentage is 3%;

[0034] 3) The above-mentioned slurry is pressed on the surface of the pretreated workpiece by a mechanica...

Embodiment 2

[0038] A graphene-doped Cu / Cu 2 The preparation method of O nano photocatalytic coating, comprises the following steps:

[0039] 1) Pre-treat the workpiece to clean off the dust, grease and rust on the surface of the workpiece;

[0040] 2) Preparation of graphene-doped Cu / Cu 2 O composite slurry: (1) take Cu 2 O powder is dispersed in alcohol aqueous solution, and ultrasonic treatment is carried out under the condition of magnetic stirring; (2) after the ultrasonic is finished, add adhesive solution and Cu powder, continue to stir evenly; (3) dropwise add graphene oxide powder, the solution continues Magnetically stirred evenly to obtain graphene-doped Cu / Cu 2 O composite slurry;

[0041] Among them, Cu 2 The mass ratio of O powder, Cu powder, graphene oxide powder is 75:20:5, and binder solution is the polyvinyl alcohol aqueous solution that mass percentage is 5%;

[0042] 3) The above-mentioned slurry is pressed on the surface of the pretreated workpiece by a mechanica...

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Abstract

The invention discloses a graphene doped Cu / Cu2O nano photocatalytic coating and a preparation method thereof. The method includes: 1) pretreating a workpiece to remove dust, oil dirt and rust on thesurface of the workpiece; 2) preparing a graphene doped Cu / Cu2O composite slurry; 3) pressing the slurry on the surface of the pretreated workpiece through a mechanical roller to form a base layer; 4)adopting a vacuum induction sintering method, placing the workpiece with the formed base layer in a graphite integrated forming sintering mold, maintaining the pressure after the density of a pressedblank does not change any more, and starting sintering to form a preset layer on the surface of the workpiece; and 5) carrying out electron beam welding on the preset layer to obtain the graphene doped Cu / Cu2O nano photocatalytic coating. The method provided by the invention puts forward solar irradiation of the graphene doped Cu / Cu2O nano photocatalytic coating by a solar concentrating device, can solve the problem of shortening the forbidden bandwidth of a catalyst to expand an absorption spectrum to visible light so as to improve the solar energy utilization rate.

Description

technical field [0001] The invention relates to the field of photocatalytic coatings, in particular to a graphene-doped Cu / Cu 2 O nano photocatalytic coating and its preparation method. Background technique [0002] With the continuous advancement of the global industrialization process, the problem of environmental pollution has become increasingly prominent, which has seriously affected people's daily production and life. In particular, water pollution has become a common concern all over the world, which has greatly threatened people's living water sources. In order to effectively solve the water pollution in the natural environment, experts and scholars from various countries are actively developing new sewage treatment technologies and methods. Traditional sewage treatment methods mainly include physical separation (such as sedimentation, adsorption, filtration, flocculation, etc.), biodegradation and chemical decomposition. Defects such as secondary pollution. . T...

Claims

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Application Information

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IPC IPC(8): B01J23/72C02F1/30C02F101/30C02F101/34C02F101/38C02F101/32
CPCB01J23/72C02F1/30C02F2101/306C02F2101/308C02F2101/345C02F2101/38C02F2101/40C02F2101/30C02F2101/32C02F2305/10B01J35/39Y02W10/37
Inventor 简明德刘成武黄卫东许明三黄旭
Owner FUJIAN UNIV OF TECH
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