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Journal of Inorganic Materials

Journal of Inorganic Materials >

2009 , Vol. 24 >Issue 4: 690 - 694

DOI: https://doi.org/10.3724/SP.J.1077.2009.00690

Research Paper

Synthesis and Structure of Carbon/Silica Hybrid Aerogels

  • CHEN Liang ,
  • ZHANG Rui ,
  • LONG Dong-Hui ,
  • LING Li-Cheng
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  • State Key Laboratory of Chemical Engineering，East China University of Science and Technology，Shanghai 200237, China

Received date: 2008-10-07

  Revised date: 2008-12-11

  Online published: 2009-07-20

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Abstract

Hybrid hydrogels were synthesized by sol-gel polymerization of resorcinol and formaldehyde added by colloidal silica solutions. Carbon/silica hybrid aerogels were prepared from the hydrogels by supercritical drying and carbonization. Carbon aerogels and silica aerogels were obtained by removing silica with HF etching and carbon with air burning from the hybrid aerogels respectively. Carbon xerogels were prepared by ambient drying, carbonization and HF etching from the hydrogels. The microstructures of the four kinds of gels were characterized by TEM and N2 adsorption. It is found that the carbon and silica frameworks are continuous and interpenetrated each other. The silica framework can improve the strength of hybrid gels, which can decrease the volume shrinkages by preventing collapse of the hybrid framework during supercritical drying and carbonization, resulting in carbon aerogels with high specific surface area of 934m2/g and large total pore volume of 3.9cm3/g.

Key words： aerogel; hybrid; pore microstructure

Cite this article

CHEN Liang , ZHANG Rui , LONG Dong-Hui , LING Li-Cheng . Synthesis and Structure of Carbon/Silica Hybrid Aerogels[J]. Journal of Inorganic Materials, 2009 , 24(4) : 690 -694 . DOI: 10.3724/SP.J.1077.2009.00690

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