Synthesis of cubic hybrid organic-inorganic mesostructures with dodecahedral morphology from a binary surfactant mixture

被引:102
作者
Kapoor, MP [1 ]
Inagaki, S [1 ]
机构
[1] Toyota Cent R&D Labs Inc, Nagakute, Aichi 4801192, Japan
关键词
D O I
10.1021/cm020345b
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Synthesis of a cubic ethane-silica hybrid organic-inorganic mesoporous material using a binary surfactant mixture is reported. The system consists of ethane-bridged organosilica (BTME), polyoxyethylene alkyl ether [C-12(EO)(4); Brij 30], and the octadecyltrimethylammonium chloride (C(18)TMACl) surfactants in a basic medium. Powder X-ray diffraction analysis along with transmission electron microscope observation revealed a cubic symmetry of the mesophase and is consistent with the Pm (3) over barn space group. Scanning electron microscope micrographs of material exhibit a well-defined crystal-like dodecahedral morphology with a uniform particle size of 5 mum. Spectroscopic analyses confirmed that an ethane fragment is covalently linked to silica in surfactant-free material. The nitrogen adsorption isotherm shows a type-IV isotherm with a pore diameter of 28 A and a Brunauer-Emmett-Teller surface area of 744 m(2)g(-1). The presented BTME-alkyltrimethylammonium-C-12(EO)(4)-NaOH-H2O system greatly facilitates the synthesis of cubic (Pm (3) over barn) hybrid mesopahses.
引用
收藏
页码:3509 / 3514
页数:6
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