https://scholars.lib.ntu.edu.tw/handle/123456789/61163
標題: | Synthesis of mesoporous silicas with different pore sizes using PEO polymers via hydrothermal treatment: A direct template for mesoporous carbon | 作者: | Hsu, Chun-Han Lin, Hong-Ping Tang, Chin-Yuan Lin, Ching-Yen |
關鍵字: | Hydrothermal treatment;Mesoporous silica;Mesoporous carbon;Polyethylene oxide;Phenol formaldehyde | 公開日期: | 2006 | 出版社: | Taipei:National Taiwan University Dept Chem Engn | 起(迄)頁: | - | 來源出版物: | Materials Chemistry and Physics 100(2006), 112–116 | 摘要: | In this paper, we used a simple hydrothermal treatment at 100 ◦C to introduce the meso-voids into the silica spheres templated by the lowtoxicity poly(ethylene oxide) homopolymers. The generation of the meso-voids is ascribed to the mismatching interactions between the siloxane groups on the further condensed silica wall and the ether groups in PEO polymers upon hydrothermal reaction. The void size in the silica spheres is dependent on the pH values of the hydrothermal solution and increases with increasing the pH value. Because of the existence of the interconnective meso-voids, the hydrothermally-treated PEO-silica spheres can be directly used as the template for mesoporous carbon without removing the PEO polymers. After PF polymer-impregnation, curing, pyrolysis and HF-etching, the mesoporous carbon spheres of high surface area and pore volume were obtained. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/2006111501243944 | 其他識別: | 246246/2006111501243944 |
顯示於: | 化學工程學系 |
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