文献类型：期刊文献

英文题名：Synthesis of ultrahigh-pore-volume carbon aerogels through a "reinforced-concrete" modified sol-gel process

作者：Chen, Qingjun[1];Long, Donghui[1];Chen, Liang[1];Liu, Xiaojun[1];Liang, Xiaoyi[1];Qiao, Wenming[1];Ling, Licheng[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2011

卷号：357

期号：1

起止页码：232

外文期刊名：JOURNAL OF NON-CRYSTALLINE SOLIDS

收录：;EI(收录号：20104913465534);WOS:【SCI-EXPANDED(收录号:WOS:000286173300042)】；

语种：英文

外文关键词：Carbon aerogels; Sol-gel preparation; Silica nanoparticles; Porosity

摘要：Ultrahigh-pore-volume carbon aerogels were synthesized by adding rigid silica nanoparticles to resorcinol-formaldehyde sols, followed by supercritical drying, pyrolysis and HF leaching. The presence of silica nanoparticles in polymer gels dramatically inhibits volume shrinkage and framework collapse during the supercritical drying and pyrolysis processes, resulting in the obtained carbon aerogels exhibiting very low bulk density and high pore volume. By changing the mass ratio of silica nanoparticles/resorcinol-formaldehyde resin, pore volumes of carbon aerogels can be tuned in the range of 2.8-6.0 cm(3)/g. (C) 2010 Published by Elsevier B.V.