Direct synthesis of unimodal and bimodal nanoporous carbon
Direct synthesis of unimodal and bimodal nanoporous carbon
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DOI：
10.1016/j.micromeso.2004.06.009
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发表时间：
2004-09-20
影响因子：
5.2
通讯作者：
Lu, YF
中科院分区：
文献类型：
--
作者：
Pang, JB;Hu, QY;Lu, YF
通过简单地从碳/二氧化硅纳米复合材料中除去二氧化硅，已经合成了单峰和双峰纳米孔（介孔）碳。蔗糖/二氧化硅纳米复合材料是在碳前体分子（即，蔗糖）。随后的碳化将蔗糖/二氧化硅纳米复合材料转化为无孔碳/二氧化硅复合材料。二氧化硅模板的去除导致具有高表面积的纳米多孔碳（例如，> 1500 ml/g）和孔体积（例如，> 1.0 cm（3）/g）。以正硅酸乙酯（TEOS）为唯一硅源，制备出了具有类似于2 nm蠕虫状孔的单峰纳米多孔碳。以TEOS衍生的二氧化硅网络和胶体二氧化硅颗粒为模板，制备了孔径分别为2 nm和27 nm的纳米多孔碳。(C)2004年爱思唯尔公司All rights reserved.
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 ml/g) and pore volumes (e.g., > 1.0 cm(3)/g). Using TEOS as the only silica source, nanoporous carbons with unimodal similar to2 nm worm-like pores are produced. Nanoporous carbons with bimodal similar to2 and similar to27 nm diameter pores have been prepared by using both the TEOS-derived silica network and the colloidal silica particles as templates. (C) 2004 Elsevier Inc. All rights reserved.