title: Synthesis of nanoporous graphite-derived carbon-silica composites by a mechanochemical intercalation approach.
abstract: A mechanochemical intercalation approach which applies a simple mechanical milling to induce intercalation reaction was applied to introduce controlled amount of tetraethoxylsilane (TEOS) into surfactant-preexpanded graphite oxide, and the relationships between the intercalation structure, the porosities of the calcined products, and the Si addition were examined. It was found that a small added amount of TEOS produced a more expanded ordered layer structure with the interlayer distance and silicon content increasing with the amount of TEOS added, although a large amount of added TEOS easily induces layer delamination, resulting in a less ordered structure. The silica structure in the composite is changed from a disordered structure having enhanced bond strain to a condensed silica network when the amount of TEOS added increases. The porosities of the final calcined samples increase with the increase of silicon content but then decrease slightly after reaching a maximum where silicon content starts to become constant, indicating that both silicon content and the composition state of silica particles and carbon layers play important roles in porosity formation.
authors.affiliation: PRESTO, Japan Science and Technology Agency, Applied Interfacial Chemistry RG, Research Institute for Environmental Management Technology, 2217-14 Hayashi-cho, Takamatsu-shi, Kagawa 761-0395, Japan.
authors.forename: Y-H
authors.initials: YH
authors.lastname: Chu
authors.forename: Z-M
authors.initials: ZM
authors.lastname: Wang
authors.forename: M
authors.initials: M
authors.lastname: Yamagishi
authors.forename: H
authors.initials: H
authors.lastname: Kanoh
authors.forename: T
authors.initials: T
authors.lastname: Hirotsu
authors.forename: Y-X
authors.initials: YX
authors.lastname: Zhang