Journal
JOURNAL OF CATALYSIS
Volume 232, Issue 2, Pages 378-385Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2005.03.024
Keywords
mesoporous molecular sieves; bismuth; characterization; catalyst; cyclohexane oxidation
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Bismuth-containing MCM-41 was directly synthesized in strongly acidic media with CPBr as the template. It was shown, for the first time, by ICP, XRD, N-2 adsorption/desorption, TEM, SEM, Si-29 MAS NMR spectra, UV-vis DRS, and Raman spectroscopy that all of the samples have high Surface area and good crystallinity, and all bismuth atoms in Bi-MCM-41 are highly dispersed in the silica-based structure. In addition, XPS spectroscopic data indicate that most of the bismuth enters the internal surface or framework of MCM-41. In the catalytic test, Bi-MCM-41 was found to be a very efficient catalyst for the oxidation of cyclohexane, with oxygen as oxidant, in a solvent-free system, and it behaves truly as a heterogeneous catalyst. (c) 2005 Elsevier Inc. All rights reserved.
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