Characterization of Galloaluminosilicate MCM-41 Molecular Sieve

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°C鍛燒時會有小部份的鋁離開結構。

關鍵字

無資料

並列摘要

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 A. 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°C.

並列關鍵字

Galloalwninosilicate ； CM-41 Molecular Sieve ； Zeolite ； Mesoporus Material

國際替代計量

Characterization of Galloaluminosilicate MCM-41 Molecular Sieve

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