Low-temperature soft template one-step synthesis method for graphitized ordered mesoporous carbon material

A graphitization and mesoporous carbon technology, applied in the field of mesoporous materials, can solve the problems of unfavorable formation of mesoporous carbon materials with orderly structure, collapse of carbon material pore structure, complicated steps, etc., so as to reduce damage and reduce heat treatment. Effect of temperature, simplified synthesis steps

Inactive Publication Date: 2010-11-24
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method separates the carbonization process from the graphitization conversion heat treatment process. The two heat treatments can easily lead to the collapse of the carbon material pore structure, which is not conducive to the formation of mesoporous carbon materials with an ordered structure, and the steps are cumbersome and the operation is complicated.

Method used

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  • Low-temperature soft template one-step synthesis method for graphitized ordered mesoporous carbon material
  • Low-temperature soft template one-step synthesis method for graphitized ordered mesoporous carbon material
  • Low-temperature soft template one-step synthesis method for graphitized ordered mesoporous carbon material

Examples

Experimental program
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Effect test

Embodiment 1

[0025] At room temperature, dissolve 2.5g F127 and 1.65g resorcinol in water / ethanol (volume ratio 1 / 1) solution, and magnetically stir for about 30 minutes until the solution turns bright brown. Add the pre-prepared water / ethanol mixed solution containing 0.872g Ni(NO3)2·6H2O into the mixed solution of F127 and hydroquinone, adjust the pH of the solution to about 1.7 with 1.0M HCl, stir and mix for 2 hours, the solution turns blue green. Then, 2.5 g of 37% formaldehyde solution was added dropwise into the above mixture, and stirring was continued for 2 hours. Place at room temperature for 72 hours, the mixed solution is gradually divided into upper and lower layers, the upper layer is a water and ethanol phase, the lower layer is a cobalt-containing phenolic resin-nonionic surfactant composite phase, the supernatant is discarded, and the lower nickel-containing organic phase is stirred for 12 hour, the resulting viscous sol was thermally polymerized at a low temperature of 8...

Embodiment 2

[0027] At room temperature, dissolve 2.5g of F127 and 1.65g of resorcinol in water / ethanol (volume ratio 1 / 1) and stir magnetically for about 30 minutes until the solution turns bright brown. Add the pre-prepared water / ethanol mixed solution containing 0.873g Co(NO3)2·6H2O into the mixed solution of F127 and hydroquinone, adjust the pH of the solution to about 1.7 with 1.0M HCl, stir and mix for 2 hours, the solution is light Fuchsia. Then, 2.5 g of 37% formaldehyde solution was added dropwise into the above mixture, and stirring was continued for 2 hours. Place at room temperature for 72 hours, the mixed solution is gradually divided into upper and lower layers, the upper layer is a water and ethanol phase, the lower layer is a cobalt-containing phenolic resin-nonionic surfactant composite phase, the supernatant is discarded, and the lower cobalt-containing organic phase is stirred for 12 hour, the resulting viscous sol was thermally polymerized at a low temperature of 85°C ...

Embodiment 3

[0029] At room temperature, dissolve 2.5g F127 and 1.65g resorcinol in water / ethanol (volume ratio 1 / 1) solution, and magnetically stir for about 30 minutes until the solution turns bright brown. Add the pre-prepared water / ethanol mixed solution containing 0.606g Fe(NO3)3·9H2O into the mixed solution of F127 and hydroquinone, stir and mix for 2 hours, and the solution turns dark purple. Then, 2.5 g of 37% formaldehyde solution was added dropwise into the above mixture, and stirring was continued for 2 hours. After standing at room temperature for 60 hours, the mixed solution was gradually divided into upper and lower layers, the upper layer was a water and ethanol phase, and the lower layer was an iron-containing phenolic resin-nonionic surfactant composite phase. The supernatant was discarded, and the lower iron-containing organic phase was stirred for 12 hour, the resulting viscous sol was thermally polymerized at a low temperature of 85°C for 12 hours, and the product was r...

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Abstract

The invention discloses a synthesis method of graphitized ordered mesoporous carbon at low temperature. The method comprises the following steps: by a soft template path, introducing a metal precursor salt with a catalytic graphitizing effect in the organic-organic self assembly process of a carbon source and a surfactant, then carbonizing in an inert gas atmosphere, and carrying out one-step synthesis to obtain the graphitized ordered mesoporous carbon material. The method combines two independent steps of synthesis of the mesoporous carbon material and metal load into one step, greatly simplifies the synthesis steps, has simple and convenient operation, combines the carbonization process and the graphitizing conversion process, reduces the damage of high temperature to the ordered structure of the material, and greatly reduces the heat treatment temperature of graphitizing by utilizing the catalytic effect of metal. Compared with non-graphitized ordered mesoporous carbon material, the material serving as a catalyst carrier shows better electro-catalysis performance and provides a new choice for fuel-cell catalyst carriers.

Description

technical field [0001] The invention belongs to the technical field of mesoporous materials, in particular to a low-temperature soft template synthesis method of graphitized ordered mesoporous carbon materials. Background technique [0002] Graphite has high thermal stability, chemical stability, electrical conductivity, high electronic conductivity, field emission performance, and metal and semiconductor properties. Carbon nanomaterials with graphite structure have greatly improved performance and can be used in the preparation industry The carrier of electrode catalysts such as electrodes and fuel cells. In recent years, the development of ordered mesoporous carbon synthesis technology provides new options for electrode catalyst supports. Compared with traditional carbon materials, ordered mesoporous carbon has the characteristics of large specific surface area, regular arrangement of pores, and narrow pore size distribution, which can make the catalyst highly dispersed o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04
Inventor 李健生王连军顾娟凌晓凤孙秀云韩卫清刘晓东
Owner NANJING UNIV OF SCI & TECH
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