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Grapheme/chitosan/cuprous oxide composite material and preparation method and applications thereof

A cuprous oxide, composite material technology, applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, water/sludge/sewage treatment, etc., can solve the problem of incomplete degradation of pollutants, high performance Cost, secondary pollution and other issues, to achieve good biocompatibility and adsorption catalytic performance, improve biocompatibility, and promote the effect of synergy

Active Publication Date: 2015-05-06
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] As an important topic in the field of environmental protection, the treatment of refractory organic wastewater has received global attention. In order to treat these wastewater and protect the environment, people have established many technologies for purification and treatment of wastewater after long-term efforts. Physical methods and chemical methods are commonly used. , biological methods, etc., these methods have their own advantages and disadvantages, most of which do not completely degrade pollutants, easily cause secondary pollution, require large investment in equipment, and high operating costs, etc.
With the improvement of the country's environmental protection requirements, the existing single technology is difficult to meet the requirements of wastewater discharge standards, so it is necessary to explore new technologies that are efficient and harmless
[0003] In the treatment of organic pollution, the photocatalytic redox reaction has a series of advantages such as simplicity, economy and practicality, and no secondary pollution. Some common photocatalytic materials such as TiO 2 , ZnO and their composites with other substances can achieve relatively high photocatalytic efficiency, but the commonly used anatase phase titanium dioxide has a band gap of 3.2eV, and electrons must be excited under ultraviolet light to play a photocatalytic role. effect, resulting in higher operating costs in practical applications

Method used

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  • Grapheme/chitosan/cuprous oxide composite material and preparation method and applications thereof
  • Grapheme/chitosan/cuprous oxide composite material and preparation method and applications thereof
  • Grapheme/chitosan/cuprous oxide composite material and preparation method and applications thereof

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Experimental program
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Effect test

Embodiment 1

[0052] The graphene / chitosan / cuprous oxide composite material of this embodiment includes the following components in parts by weight: 1 part of graphene, 1 part of chitosan, and 4 parts of cuprous oxide.

[0053] The preparation method of the graphene / chitosan / cuprous oxide composite material of the present embodiment, concrete operation steps are as follows:

[0054] 1) Preparation of graphene: Weigh 1g of graphite, 4g of potassium permanganate, and 30mL of concentrated sulfuric acid, put them in the refrigerator together with the reaction kettle, freeze at 0°C for 1.5h, add each raw material into a polytetrafluoroethylene bottle, put Take out the reaction kettle, react at 80°C for 1 hour, open it quickly after cooling, pour the reactant into a 500mL beaker, add 150mL water to stir, and add 4ml hydrogen peroxide dropwise, the color turns golden yellow. After stirring for 1 hour, centrifuge, wash with 0.5% HCl and deionized water until pH = 7, put it into a cell pulverizer to...

Embodiment 2

[0060] The graphene / chitosan / cuprous oxide composite material of this embodiment includes the following components in parts by weight: 2 parts of graphene, 3 parts of chitosan, and 3 parts of cuprous oxide.

[0061] The preparation method of the graphene / chitosan / cuprous oxide composite material of the present embodiment, concrete operation steps are as follows:

[0062] 1) Preparation of graphene: Weigh 1g of graphite, 3g of potassium permanganate, and 20mL of concentrated sulfuric acid, put them in the refrigerator together with the reaction kettle, freeze at -4°C for 1 hour, add each raw material into a polytetrafluoroethylene bottle, put Take out the reaction kettle after reacting at 120°C for 1 hour, open it quickly after cooling, pour the reactant into a 500mL beaker, add 150mL water to stir, and add 3ml hydrogen peroxide dropwise, the color turns golden yellow. After stirring for 1 hour, centrifuge, wash with 0.1% HCl and deionized water until pH = 7, put it into a cell...

Embodiment 3

[0068] The graphene / chitosan / cuprous oxide composite material of this embodiment includes the following components in parts by weight: 3 parts of graphene, 2 parts of chitosan, and 6 parts of cuprous oxide.

[0069] The preparation method of the graphene / chitosan / cuprous oxide composite material of the present embodiment, concrete operation steps are as follows:

[0070] 1) Preparation of graphene: Weigh 3g of graphite, 8g of potassium permanganate, and 150mL of concentrated sulfuric acid, put them in the refrigerator together with the reaction kettle, freeze at -4°C for 1 hour, add each raw material into a polytetrafluoroethylene bottle, put Take out the reaction kettle after reacting at 100°C for 1.5h, open it quickly after cooling, pour the reactant into a 500mL beaker, add 150mL water to stir, and add 5ml hydrogen peroxide dropwise, the color turns golden yellow. After stirring for 1 hour, centrifuge, wash with 2% HCl and deionized water until pH = 7, put it into a cell pu...

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Abstract

The invention discloses a graphene / chitosan / cuprous oxide composite material and a preparation method and applications thereof, which belong to the technical field of visible light catalytic materials. The composite material mainly comprises graphene, chitosan and cuprous oxide, wherein the graphene has extremely good electron capture and transmission performances, and as a carrier of photo-generated electrons, the graphene reduces the recombination rate of photo-generated electrons and holes of the cuprous oxide; by using the excellent adsorption property of the graphene to organic pollutants, the photocatalytic efficiency of a photocatalyst is improved; a good synergistic effect exists among the composited chitosan, the graphene and the cuprous oxide, and while the adsorption effect of the catalyst is improved, the degradation performance of the visible light catalyst to organic pollutants is improved. Under same conditions, compared with cuprous oxide, and cuprous oxide / chitosan, the graphene / chitosan / cuprous oxide composite material shows higher adsorption capacity and photocatalytic properties.

Description

technical field [0001] The invention relates to the technical field of photocatalyst preparation and application, in particular to a graphene / chitosan / cuprous oxide composite material and its preparation method and application. Background technique [0002] As an important topic in the field of environmental protection, the treatment of refractory organic wastewater has received global attention. In order to treat these wastewater and protect the environment, people have established many technologies for purification and treatment of wastewater after long-term efforts. Physical methods and chemical methods are commonly used. , Biological methods, etc. These methods have their own advantages and disadvantages, most of which do not completely degrade pollutants, easily cause secondary pollution, require large investment in equipment, and high operating costs. With the improvement of the country's environmental protection requirements, the existing single technology is difficul...

Claims

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Application Information

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IPC IPC(8): B01J31/28B01J20/24C02F1/30C02F101/38
CPCY02W10/37
Inventor 王明花何领好董华东彭东来蔡立芳张宏忠杨艺晓张帅张治红
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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