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g-C3N4/graphene composite material and preparation method and application thereof

A composite material, g-c3n4 technology, applied in g-C3N4/graphene composite material, in the field of its preparation, can solve the problems of not being able to perform well, the specific surface area of ​​the composite material is small, etc.

Active Publication Date: 2019-07-30
NINGBO GRAPHENE INNOVATION CENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The specific surface area of ​​the obtained composite material is small, and the performance of each component cannot be well exerted

Method used

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  • g-C3N4/graphene composite material and preparation method and application thereof
  • g-C3N4/graphene composite material and preparation method and application thereof
  • g-C3N4/graphene composite material and preparation method and application thereof

Examples

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preparation example Construction

[0028] g-C 3 N 4 / The preparation method of graphene composite material, comprises the steps:

[0029] (1) Preparation of g-C 3 N 4 powder:

[0030] The nitrogen-containing compound is calcined for the first time at a temperature of 480-520°C for 0.8-1.5h, and then calcined for a second time at a temperature of 530-580°C for 1.5-2.5h to obtain g-C 3 N 4 powder.

[0031] Specifically, weigh a certain amount of melamine and place it in a muffle furnace, heat it at 500°C for 1 hour for the first calcination, and heat it for 2 hours at 550°C for the second calcination to obtain g-C 3 N 4 powder. Among them, the calcination is divided into two times, and the temperature of the first calcination is lower than the temperature of the second calcination, and a relatively loose structure of g-C can be obtained. 3 N 4 powder, also get more g-C 3 N 4 powder.

[0032] Optionally, the nitrogen-containing compound includes one or more of thiourea, dicyandiamine, melamine or urea...

Embodiment 1

[0055] g-C 3 N 4 / The preparation method of graphene composite material, comprises the steps:

[0056] (1) Put melamine in a muffle furnace, perform the first calcination at a temperature of 500°C for 1 hour, and then perform a second calcination at a temperature of 550°C for 2 hours to obtain g-C 3 N 4 powder.

[0057] (2), the g-C 3 N 4 The powder and the graphite powder were dispersed in ethanol water, put into a ball mill for 3 hours, centrifuged, and the solid was taken and dried to obtain a mixed powder. Among them, g-C 3 N 4 The mass ratio of powder and graphite powder is 1:1.

[0058] (3), weigh a certain mass of the above mixed g-C 3 N 4 Put the powder and graphite powder into the mold, add a certain pressure of 15MPa, press the sample under the conditions of 1.5min holding time, and obtain an electrode sheet with a diameter of 1cm and a thickness of 0.5cm.

[0059] (4) Using the electrode sheet as the anode, the platinum wire as the cathode, and the dilute...

Embodiment 2

[0062] g-C 3 N 4 / The preparation method of graphene composite material, comprises the steps:

[0063] (1) Put melamine in a muffle furnace, perform the first calcination at a temperature of 500°C for 1 hour, and then perform a second calcination at a temperature of 550°C for 2 hours to obtain g-C 3 N 4 powder.

[0064] (2), the g-C 3 N 4The powder and graphite powder were put into a ball mill and milled for 3 hours to obtain a mixed powder. Among them, g-C 3 N 4 The mass ratio of powder and graphite powder is 1:1.

[0065] (3), weigh a certain mass of the above mixed g-C 3 N 4 Put the powder and graphite powder into the mold, add a certain pressure of 15MPa, press the sample under the conditions of 1.5min holding time, and obtain an electrode sheet with a diameter of 1cm and a thickness of 0.5cm.

[0066] (4) Using the electrode sheet as the anode, the platinum wire as the cathode, and the dilute sulfuric acid with a concentration of 4mol / L as the electrolyte, perf...

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Abstract

The embodiment of the invention provides a g-C3N4 / graphene composite material and a preparation method and application thereof, and belongs to the technical field of graphene. The preparation method of the g-C3N4 / graphene composite material comprises the following steps that g-C3N4 powder and graphene powder are mixed to obtain an electrode serving as an anode, electrochemical treatment is carriedout in electrolyte, and the electrode obtained after electrochemical treatment is dried; the dried electrode is placed in a microwave environment for treatment. When electrochemical treatment is carried out, the electrolyte can enter a lamellar structure in g-C3N4 and graphite, and the electrolyte can be quickly decomposed and gasified due to high energy of microwaves under microwave treatment, so that the electrolyte quickly expands, and when pressure at the moment exceeds the van der waals force between layers, the layers are separated and stripped into nanosheets to obtain the g-C3N4 / graphene composite material. The specific surface area of the composite material is high, so that the redox capability of the composite material is improved.

Description

technical field [0001] The application relates to the technical field of graphene, in particular, to a g-C 3 N 4 / Graphene composite material, its preparation method and application. Background technique [0002] Existing g-C 3 N 4 / graphene composites are usually the g-C 3 N 4 The powder and graphene powder are mixed and obtained by ball milling with a high-energy ball mill. The specific surface area of ​​the obtained composite material is small, and the performance of each component cannot be well exerted. Contents of the invention [0003] The purpose of this application is to provide a kind of g-C 3 N 4 / Graphene composite material, its preparation method and application, its specific surface area is larger, can effectively degrade organic pollutants. [0004] In the first aspect, the embodiment of the present application provides a g-C 3 N 4 The preparation method of / graphene composite material comprises the steps: with g-C 3 N 4 The electrode obtained ...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/10C02F1/30C02F101/30
CPCB01J27/24C02F1/30C02F2101/308B01J35/39B01J35/61
Inventor 陈荧赖垂林刘兆平
Owner NINGBO GRAPHENE INNOVATION CENT CO LTD
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