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A preparation method of nanoporous carbon material based on high repetition frequency laser graphitization

A technology of nanoporous carbon and high repetition frequency, which is applied in the field of preparation of nanoporous carbon materials to achieve the effect of low price, large specific surface area and high degree of graphitization

Active Publication Date: 2020-09-08
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, laser-induced nanoporous graphitized carbon materials are currently limited to several carbon source materials, and the choice of lasers is limited to long-wavelength continuous lasers.

Method used

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  • A preparation method of nanoporous carbon material based on high repetition frequency laser graphitization
  • A preparation method of nanoporous carbon material based on high repetition frequency laser graphitization
  • A preparation method of nanoporous carbon material based on high repetition frequency laser graphitization

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Embodiment

[0024] Embodiment, a kind of preparation method of nanoporous carbon material based on high repetition frequency laser graphitization, comprises the following steps:

[0025] 1) Use a metallographic mounting machine to shape the phenolic resin powder into a circular sheet under heating conditions. When the temperature of the mounting machine rises to 130-140 ° C; the phenolic resin is inlaid by the mounting machine for 8-15 minutes, and the temperature is kept at 130 ± 5 ° C. The pressure is 30±5MPa, and it is made into a circular sheet with a thickness of 3-10mm;

[0026] 2) Put the round sheet of phenolic resin into the container 6 that provides the inert gas. The container 6 for the inert gas has a cubic structure and is hollow inside. On the surface of the material to be processed in the container, the upper side is a quartz glass window 7 that can pass through the laser, and the front and rear sides are provided with inert gas inlets and gas outlets, and the flow rate of ...

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Abstract

The invention provides a preparation method for a nanometer porous carbon material based on high repetition frequency laser graphitization. The preparation method comprises the following steps: molding phenolic resin powder under the condition of heating by utilizing a metallographic inlay machine so as to obtain a circular sheet; then placing the circular sheet into a container which supplies inert gas; and carrying out direct writing on the circular sheet through a laser direct-writing processing system by utilizing high repetition frequency laser under the protection of the inert gas, and allowing non-carbon elements to be released in a form of gas so as to obtain a porous graphitized nanometer carbon material. The nanometer porous graphitized carbon material prepared by using the preparation method provided by the invention has rich hierarchical pores, simple preparation process, low price, high efficiency, greenness and environmental protection.

Description

technical field [0001] The invention belongs to the technical field of preparation of nanoporous graphitized carbon materials, and in particular relates to a preparation method of nanoporous carbon materials based on high repetition frequency laser graphitization. Background technique [0002] Nanoporous graphitized carbon material is a porous carbon material composed of graphitized nano-thin walls. Its pore size is between nano-scale micropores and micron-scale macropores. It has large specific surface area, high electrical conductivity, and unique hierarchical pores. The structure, good chemical stability and thermal stability and other advantages have extraordinary application prospects in the fields of gas separation, water purification, energy storage and conversion. Due to its low cost, the structure control of nanoporous graphitized carbon materials can be realized through the selection of carbon-rich precursors and the screening of synthesis methods and conditions, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/05
Inventor 王恪典王方成董霞梅雪松翟兆阳高梦段文强朱晨光
Owner XI AN JIAOTONG UNIV
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