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    Title: 利用溶膠:凝膠法備多孔性SiO/sub 2/塊體
    Other Titles: Preparation of Porous SiO/sub 2/ Monoliths by Sol-Gel Techniques
    Authors: Lieh, Chao-Chin;Yu, Husan-Fu
    Contributors: 淡江大學化學工程學系
    Keywords: 溶膠-凝膠法;二氧化矽塊體;固凝膠;無機濾材;Sol-Gel Method;Silicon Dioxide Monolith;Xerogel;Inorganic Filter
    Date: 2001-12
    Issue Date: 2014-02-09 00:50:22 (UTC+8)
    Abstract: 本研究利用溶膠-凝膠法製備多孔性之無支撐式SiO/sub 2/塊體。THOS之醇溶液與水在pH值為3的環境下反應,以形成溶膠溶液。溶膠液歷經了膠化、熟化及乾燥過程後,可得到SiO/sub 2/固凝膠塊體。所得的樣品,以不同的溫度進行熱處理,並且以BET比表面積測量儀、氣體比重儀、水銀比重儀等來做特性分析。從分析結果顯示,所製備的SiO/sub 2/塊體的比表面積與孔隙度,會隨溫度上升而減少。在700℃或更高的溫度時,塊體的孔洞會大於2nm;在900℃時,樣品大部分的孔洞會消除,而且塊體會從透明的碇狀變成不透明的。
    Porous nonsupported SiO/sub 2/ monoliths were prepared using a sol-gelmethod. Alcoholic solution of TEOS was reacted with H/sub 2/O at pH=3,resulting in the formation of sol solution. After gelation, aging, anddrying, SiO/sub 2/ xerogels in monolithic form were obtained. Theobtained specimens were thermally treated at different temperaturesand were characterized using BET sorptometer, gas pycnometer andmercury pycnometer. The results indicated that specific surface areaand porosity of the prepared SiO/sub 2/ monoliths were decreased withtemperature. At 700℃ or above, the pores in the monoliths are largerthan 2nm and at 900℃, most of the pores in the specimen wereeliminated and the monoliths were changed from transparent pellets toopaque ones.
    Relation: 第二十三屆輸送現象及其應用研討會暨膜分離論壇第四屆台灣-新加坡環境保護技術研討會論文集=Proceedings of The 23st Symposium of Transport Phenomena and 1ts Applications/Membrance Seperation Forum/The 4st Taiwan-Singapore Jiont Symposium on Environmental Technology
    Appears in Collections:[化學工程與材料工程學系暨研究所] 會議論文

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