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Method for preparing multi-element co-doped graphene by hydrothermal method

A technology of co-doping and hydrothermal method, applied in the direction of graphene, chemical instruments and methods, electrical components, etc., to achieve the effect of simple synthesis method

Inactive Publication Date: 2017-05-10
TIANJIN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The problem to be solved by the present invention is to find a method for preparing doped modified graphene with low production cost, simple production process, easy operation, safety and pollution-free

Method used

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  • Method for preparing multi-element co-doped graphene by hydrothermal method
  • Method for preparing multi-element co-doped graphene by hydrothermal method
  • Method for preparing multi-element co-doped graphene by hydrothermal method

Examples

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Effect test

Embodiment 1

[0049] The first example: (1) The first step is to improve the Hummers method to prepare graphite oxide: 1. Weigh 0.1g graphite powder and 0.05g NaNO respectively 3 Mix evenly; 2. Under the condition of ice-water bath, add 3mL concentrated H 2 SO 4 Stir well, and slowly add 0.5g KMnO 4 Stir for 0.5 hours; 3. After stirring for 1 day at room temperature, add 10 mL of 1% H 2 SO 4 Stir for 0.5 hours; 4. Add an appropriate amount (about 0.5mL) of hydrogen peroxide (H 2 o 2 ) Stir until no bubbles appear in the solution; 5. Clean, use 5% HNO in a 4000mL beaker 3 Wash 2 times, then use 1% HNO 3 Wash twice; 6. Add deionized water and centrifugally wash to pH = 7, and dry the resulting solution at room temperature 25° C. to obtain graphite oxide.

[0050] The second example: (1) The first step is to improve the Hummers method to prepare graphite oxide: 1. Weigh 3g of graphite powder and 2.5g of NaNO 3 Mix evenly; 2. Under the condition of ice-water bath, add 50mL concentrated ...

Embodiment 2

[0053] Weigh 0.004g of graphite oxide to prepare 45mL of graphene oxide dispersion, weigh 0.004g of thiourea and 0.004g of ammonium hydrogen phosphate, mix and stir until completely dissolved, put the obtained solution into a 50mL hydrothermal reaction kettle, and adjust the temperature Keep at 150°C for 1 hour. After the hydrothermal reactor is cooled to room temperature, take out the reaction product and wash it with deionized water. The product is frozen for 12 hours and then dried in a vacuum freeze dryer for 24 hours to obtain phosphorus, nitrogen and sulfur multi-component doped graphene. product.

Embodiment 3

[0055] Weigh 0.14g of graphite oxide to prepare 45mL of graphene oxide dispersion, weigh 4.2g of thiourea and 4.2g of ammonium hydrogen phosphate, mix and stir until completely dissolved, put the obtained solution into a 50mL hydrothermal reaction kettle, and adjust the temperature Keep at 180°C for 24 hours. After the hydrothermal reactor is cooled to room temperature, take out the reaction product and wash it with deionized water. The product is frozen for 1 hour and then dried in a vacuum freeze dryer for 24 hours to obtain phosphorus, nitrogen and sulfur multi-component doped graphene. product.

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Abstract

The invention discloses a method for preparing multi-element co-doped three-dimensional porous graphene by a hydrothermal method. The method comprises the following steps: (a) ultrasonically stripping graphite oxide prepared by a Hummers method in a liquid phase to obtain a graphite oxide dispersion; (b) selecting an appropriate doping source to prepare a multi-element co-doped graphene material through one-step hydrothermal reaction, wherein the prepared sample layer is complete in structure, good in dispersity, high in quality and large in effective specific surface area. Compared with the prior art, the method is simple and controllable, environment-friendly in raw material and low in cost. The multi-element co-doped graphene material prepared by the method can be applied to many fields such as electrochemical energy storage, sensor, biological carrier, and catalyst.

Description

technical field [0001] The invention mainly relates to the preparation of graphene oxide and multi-component co-doping technology of graphene, more specifically a method for preparing multi-component co-doped graphene by hydrothermal method. Background technique [0002] Graphene is a graphite structure similar to a single layer. Due to its special atomic hybridization method, it has a high specific surface area, excellent flexibility, mechanical strength and thermal and chemical stability, and high electrical conductivity. . These attractive properties of graphene show great potential to be applied in various fields. These fields include biomedicine, composite materials, sensors, catalysts, energy conversion and storage devices, electronics, and transparent electrodes for solar cells, among others. However, since graphene is a semiconductor with a zero energy band gap, which largely limits the application of graphene in electrical devices, in order to improve or improve t...

Claims

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Application Information

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IPC IPC(8): C01B32/184H01M4/583H01M4/62H01M10/0525
CPCC01B2204/22C01B2204/32C01P2002/85C01P2004/03H01M4/583H01M4/625H01M10/0525Y02E60/10
Inventor 李喜飞鄯慧李德军孙学良熊东斌王晶晶寇华日王盼
Owner TIANJIN NORMAL UNIVERSITY
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