Chen, Chen and Zhou, Lipeng and Zhang, Qiaohong and Ma, Hong and Miao, Hong and Xu, Jie (2007) Design of bifunctionalized hexagonal mesoporous silicas for selective oxidation of cyclohexane. NANOTECHNOLOGY, 18 (21).
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Official URL: http://www.iop.org/EJ/abstract/-search=66176638.1/...
Bifunctionalized hexagonal mesoporous silicas, CoPh-HMS, were designed and successfully synthesized by a one-step co-condensation route at ambient temperature. This new material possesses the typical wormhole structure of HMS material. Co2+ ions were incorporated into the frameworks in tetrahedral coordination along with phenyl groups immobilized on the surface, confirmed by a careful spectroscopic ( Fourier transform infrared, ultraviolet - visible and Si-29 magic-angle spinning nuclear magnetic resonance) study. It was used in the liquid-phase selective oxidation of cyclohexane with molecular oxygen under solvent-free conditions, and showed excellent performance. The results indicate the potential for intentional design of the catalytic environment at a nanometre level with the combination of transition metal incorporation and surface organofunctionalization for mesoporous siliceous materials.
|Uncontrolled Keywords:||SOLID ACID CATALYSTS; MOLECULAR-SIEVES; HMS|
|Subjects:||Material Science > Nanochemistry|
|Deposited On:||28 Sep 2009 11:14|
|Last Modified:||28 Sep 2009 11:14|
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