期刊
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
卷 371, 期 1-3, 页码 126-130出版社
ELSEVIER
DOI: 10.1016/j.colsurfa.2010.09.022
关键词
Macro-mesoporous materials; gamma-Al2O3; MAS NMR; Formation mechanism
资金
- National Natural Foundation of China [50774095]
- National Key Technology Research & Development Program [2008BAE60B06]
Highly ordered macro-mesoporous gamma-Al2O3 was synthesized via a facile route. The samples were characterized by N-2 porosimetry, powder X-ray diffraction (XRD), transmission electron microscopy (TEM) and solid-state magic angle spinining nuclear magnetic resonance (MAS NMR). The results showed that the synthesized porous gamma-Al2O3 had a larger specific surface area of ca. 320 m(2)/g with two well-defined pore networks concentrated at ca. 30 nm and 70 nm. Higher content of five-coordinated Al induced by the coexistence of macro-mesoporous network indicated a potential application as heterogeneous catalyst. A general mechanism for the formation of macro-mesoporous gamma-Al2O3 is also proposed. (C) 2010 Elsevier B.V. All rights reserved.
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