頁籤選單縮合
題名 | Characterization of Galloaluminosilicate MCM-41 Molecular Sieve=矽酸鎵鋁MCM-41分子篩的性質研究 |
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作者 | 陳郁文; 許慶強; 王毓媚; Chen, Yu-wen; Koh, Keng-khian; Wang, Yu-may; |
期刊 | Journal of the Chinese Institute of Chemical Engineers |
出版日期 | 20000300 |
卷期 | 31:2 2000.03[民89.03] |
頁次 | 頁123-134 |
分類號 | 472 |
語文 | eng |
關鍵詞 | 矽酸鎵鋁; MCM-41分子篩; Galloaluminosilicate; MCM-41 molecular sieve; Zeolite; Mesoporous material; |
中文摘要 | 本研究合成一系列不同成分的矽酸鎵鋁MCM-41分子篩,這些樣品以氮吸附、X光繞射、微分熱分析、熱重分析、掃描式電子顯微鏡、穿透式電子顯微鏡及固態核磁共振鑑定其性質。這些樣品軍具有MCM-41的結構,而鎵係以電子型態均勻分散,顯示其可能均在MCM-41的結構上。將鎵與鋁置入MCM-41的結構會影響到中孔長範圍的次序,但不會破壞其中孔型的本質,而鎵比鋁容易進入MCM-41結構內。所有的樣品的孔洞直徑均大約為30埃,其型態為圓球顆粒。當樣品在500℃鍛燒時會有小部份的鋁離開結構。 |
英文摘要 | A series of mesoporous galloaluminosilicate MCM-41 molecular sieves with various compositions have been synthesized. Hexadecyltrimethylammonium bromide was used as an organic surfactant in the synthesis. These materials were characterized with nitrogen sorption, powder X-ray diffraction (XRD), differential thermal analysis (DTA), thermogramitric analysis (TGA) , scanning electron microscope (SEM), transmission electron microscope (TEM) and solid state NMR. The solid products had the MCM-41 structure and contained only atomically dispersed gallium consistent with the framework gallium in MCM-41. Incorporation of either Ga or Al into the framework of MCM-41 affects the long-range order of the mesopores without damaging the essentially mesoporous nature of the materials. Gallium was easier to incorporate into the framework than aluminum. All of the materials had a uniform pore size distribution with pore size around 30 [926f]. The morphologies of [Ga, Al]-MCM-41 were spherical particle packages. A small amount of aluminum had been expelled from the framework of MCM-41 upon calcination at 550℃. |
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