Journal
CATALYSIS COMMUNICATIONS
Volume 8, Issue 7, Pages 1060-1064Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.catcom.2006.10.027
Keywords
SBA 15; mesoporous; oxotungsten; cyclohexene; adipic acid; hydrogen peroxide; TEM; raman; UV-Vis; powder x-ray diffraction; XPS
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An oxotungsten-silica mesoporous structure (WSBA-15) has a hierarchical crystalline architecture in which the W dopants possess tetrahedral coordination geometries for the mixed-valence states W6+, W5+, and W4+. The WSBA-15 catalyst can be recycled-without any loss of activity-for the direct oxidation (30% H2O2,) of cyclohexene to colorless, crystalline adipic acid (55% yield) under organic solvent-free conditions. (C) 2006 Elsevier B.V. All rights reserved.
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