Bismuth-Containing SBA-15 Mesoporous Silica Catalysts for Solvent-Free Liquid-Phase Oxidation of Cyclohexane by Molecular Oxygen

Bismuth (Bi)‐containing SBA‐15 mesoporous silica catalysts, Bi/SBA‐15, with different Bi loadings were synthesized by a direct hydrothermal method. The materials were characterized in detail by various techniques. Powder‐X‐ray‐diffraction (PXRD), N2‐adsorption/desorption, and transmission‐electron‐m...

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Bibliographic Details
Published in:Helvetica chimica acta 2007-09, Vol.90 (9), p.1837-1847
Main Authors: Wang, Huan-Ling, Li, Rong, Zheng, Yun-Feng, Chen, Hang-Ning, Jin, Jun, Wang, Fu-Shan, Ma, Jian-Tai
Format: Article
Language:English
Subjects:
Bismuth
Catalysis
Cyclohexane
Mesoporous materials
molecular
Oxidation
Oxygen
Oxygen, molecular
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Summary:Bismuth (Bi)‐containing SBA‐15 mesoporous silica catalysts, Bi/SBA‐15, with different Bi loadings were synthesized by a direct hydrothermal method. The materials were characterized in detail by various techniques. Powder‐X‐ray‐diffraction (PXRD), N2‐adsorption/desorption, and transmission‐electron‐microscopic (TEM) analyses revealed that the well‐ordered hexagonal structure of SBA‐15 is maintained after Bi incorporation. Diffuse‐reflectance UV/VIS, Raman, and X‐ray photoelectron spectroscopy (XPS) showed that the incorporated Bi‐atoms are highly dispersed, most of them entering the internal surface of SBA‐15. The new, very stable catalysts were found to be highly efficient for the oxidation of cyclohexane in a solvent‐free system, molecular oxygen (O2) being used as oxidant.
ISSN:0018-019X
1522-2675
DOI:10.1002/hlca.200790192