期刊
MICROPOROUS AND MESOPOROUS MATERIALS
卷 118, 期 1-3, 页码 496-502出版社
ELSEVIER
DOI: 10.1016/j.micromeso.2008.09.036
关键词
Graphite; Carbon-silica/titania nanocomposite; Soft-chemical method
Nanoporous composites of carbon nanosheets and single or mixed TiO2 and SiO2 were synthesized from graphite oxide (GO) precursor by a mechanochemical intercalation (MCI) method and their structural and adsorption/photocatalytic properties examined. It was found that a mixed Ti and Si organic phase behaves differently from a single phase in the MCI process, with linkages of SiO2 and TiO2 forming between the carbon layers, leading to an intercalation structure with improved surface hydrophilicity and a composite with enhanced microporosity and a reduced total amount of oxides. Although structural regularity of intercalated GO becomes poorer by applying Ti species in the MCI method, carbon-mixed oxide composites with an appropriate pore structure and sufficient Ti content exhibit a synergy effect of adsorption concentration and photocatalysis toward organic molecules. (C) 2008 Elsevier Inc. All rights reserved.
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