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Micro-wave preparation method for biomass-based graphitized carbon and carbon-carbon composite material

A technology of graphitizing carbon and biomass, applied in the field of graphitic carbon, to achieve the effects of high degree of graphitization, low energy consumption, and easy large-scale preparation

Inactive Publication Date: 2009-12-30
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the graphitized carbon material prepared by this method has a good degree of order, this method requires the use of expensive mesoporous silica templates and subsequent complicated procedures such as the removal of many templates, and only part of the graphite can be obtained. mesoporous carbon materials

Method used

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  • Micro-wave preparation method for biomass-based graphitized carbon and carbon-carbon composite material
  • Micro-wave preparation method for biomass-based graphitized carbon and carbon-carbon composite material
  • Micro-wave preparation method for biomass-based graphitized carbon and carbon-carbon composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Dilute 0.324 g filter paper in 0.1 g / ml FeCl 3 Soak in solution (15mL) for 0.5 hour, take out and dry. impregnated with FeCl 3 The filter paper was suspended in a closed container filled with pyrrole, and subjected to vapor phase polymerization at 30° C. for 7 days to obtain a Fe / PPy / filter paper composite (mass ratio 2.5 / 2.5 / 100). The Fe / PPy / filter paper composite was transferred into a microwave reactor, and treated with microwave for 5 minutes, and the microwave power was controlled at 1000W. The Fe / PPy / filter paper composite continued to maintain a hot state during the reaction process. After the reaction, the product was cooled to room temperature and treated with an acid with a concentration of 2mol / L to remove the generated iron carbide, filtered and dried to obtain a high specific Surface area of ​​graphitized carbon nanostructure material with a pore volume of 0.33 cm 3 / g, the specific surface area is 293.2m2 / g. SEM results showed that the macroscopic and...

Embodiment 2

[0040] Add 0.5 g of wood to 0.1 g / ml FeCl 3 Soak in solution (15mL) for 3 hours, take out and dry. The dried impregnated with FeCl 3 The wood was suspended in a closed container filled with pyrrole, and subjected to vapor phase polymerization at 50° C. for 14 days to obtain Fe / PPy / wood composite (mass ratio 14.5 / 14.5 / 100). The Fe / PPy / wood composite was transferred to a microwave reactor, and treated with microwave for 5 minutes, and the power of the microwave was controlled at 1000W. The Fe / PPy / wood composite continued to maintain a hot state during the reaction. After the reaction, the product was cooled to room temperature, and after being treated with an acid with a concentration of 4mol / L, the generated iron carbide was removed, filtered, and dried to obtain a high specific graphitized carbon nanostructure material with a surface area of ​​0.24 cm pore volume 3 / g, the specific surface area is 350.9m 2 / g.

Embodiment 3

[0042] Add 0.5 g of cotton to 0.1 g / ml FeCl 3 Soak in the solution (15mL) for 1.5 hours, take it out and dry it. The dried impregnated with FeCl 3 The cotton was suspended in an airtight container filled with pyrrole, and subjected to vapor phase polymerization at 30° C. for 9 days to obtain Fe / PPy / cotton composite (mass ratio 9.5 / 9.5 / 100). The Fe / PPy / cotton composite was transferred to a microwave reactor, and treated with microwave for 5 minutes, and the microwave power was controlled at 700W. The Fe / PPy / filter paper composite continued to maintain a hot state during the reaction process. After the reaction, the product was cooled to room temperature and treated with an acid with a concentration of 2mol / L to remove the generated iron carbide, filtered and dried to obtain a high specific graphitized carbon nanostructure material with a surface area of ​​0.26 cm pore volume 3 / g, the specific surface area is 431.3m 2 / g.

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Abstract

The invention relates to graphitic carbon, in particular to a non-hard template method for preparing a graphite composite material with large specific surface area by taking a PPy / biomass complex as a carbonization precursor and quickly carbonizing and graphitizing the carbonization precursor under the action of microwave. The concrete preparation method comprises the steps: firstly, adopting ferric trichloride as a catalyst, and adopting steam phase polymerization technology to prepare a Fe / PPy / biomass complex; then performing micro-wave carbonization treatment on the prepared Fe / PPy / biomass complex; and finally removing generated ferric carbide from a sample through acid treatment to obtain a graphitized carbon material with high specific surface area. With similar methods, the applicant also successfully prepares a metallic carbide / graphitized carbon composite material.

Description

technical field [0001] The invention relates to graphite carbon, in particular to a microwave rapid preparation method of graphitized carbon with high specific surface area and metal carbide / graphitized carbon composite material. Background technique [0002] Compared with amorphous carbon, graphitic carbon has high crystallinity, high thermal stability, high electrical conductivity, and strong oxidation resistance. In recent years, due to the potential application of graphite materials in the fields of electrocatalysis, fuel cells and lithium-ion batteries, more and more researchers have begun to pay attention to the preparation of graphite materials with large specific surface area. The general method for preparing graphite includes a high temperature treatment step, usually exceeding 2000°C. However, this treatment method often results in carbon materials with usually small specific surface area and pore volume. In order to overcome this shortcoming, a template method h...

Claims

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Application Information

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IPC IPC(8): C01B31/04C04B35/524
Inventor 包信和王春雷马丁
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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