Direct synthesis of unimodal and bimodal nanoporous carbon
- 作者：Pang ; Jiebin ; Hu ; Qingyuan ; Wu ; Zhiwang ; Eric Hampsey ; J. ; He ; Jibao ; Lu ; Yunfeng
- 关键词：Nanoporous carbon ; Unimodal ; Bimodal ; Hierarchical ; Templating synthesis
- 刊名：Microporous and Mesoporous Materials
- 出版年：2004
- 期刊代码：78_13871811
- 类别：ch
- 出版时间：September 20, 2004
- 卷：74
- 期：1-3
- 页码：73-78
- 文件大小：607 K
摘要
Unimodal and bimodal nanoporous (mesoporous) carbons have been synthesized by simply removing silica from carbon/silica nanocomposites. The sucrose/silica nanocomposites are directly prepared by the sol–gel process of tetraethyl orthosilicate (TEOS) with or without colloidal silica particles in the presence of carbon precursor molecules (i.e., sucrose). Subsequent carbonization converts the sucrose/silica nanocomposites into nonporous carbon/silica composites. Removal of the silica templates results in nanoporous carbons with high surface areas (e.g., >1500 m2/g) and pore volumes (e.g., >1.0 cm3/g). Using TEOS as the only silica source, nanoporous carbons with unimodal 
2 nm worm-like pores are produced. Nanoporous carbons with bimodal 2 and 27 nm diameter pores have been prepared by using both the TEOS-derived silica network and the colloidal silica particles as templates.
2 nm worm-like pores are produced. Nanoporous carbons with bimodal 2 and 27 nm diameter pores have been prepared by using both the TEOS-derived silica network and the colloidal silica particles as templates.