Direct Synthesis of Bifunctionalized Hexagonal Mesoporous Silicas and Its Catalytic Performance for Aerobic Oxidation of Cyclohexane

被引：58

作者：

Chen, Chen ^{[1
]}

Xu, Jie ^{[1
]}

Zhang, Qiaohong ^{[1
]}

Ma, Hong ^{[1
]}

Miao, Hong ^{[1
]}

Zhou, Lipeng ^{[1
]}

机构：

[1] Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2009年 / 113卷 / 07期

基金：

中国国家自然科学基金;

关键词：

MOLECULAR-SIEVES; SELECTIVE OXIDATION; LIQUID-PHASE; HYDROCARBONS; OXYGEN; MCM-41; ROUTE; AIR; HMS;

D O I：

10.1021/jp809427t

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

According to the characteristics of the cyclohexane oxidation reaction a series of bifunctionalized hexagonal mesoporous silicas, CoPh-HMS, were designed and successfully synthesized by a one-step co-condensation route. The results of small-angle XRD, TEM, and N-2 adsorption-desorption measurements showed that the resultant materials had well-ordered mesoscopic structures. Co2+ ions were incorporated into the frameworks in tetrahedral coordination along with phenyl groups immobilized on the surface, confirmed by a careful spectroscopic (FT-IR, UV-visible, and Si-29 MAS NMR) study. The surfaces of the materials were proved to be more hydrophobic with higher Ph loading, and the largest water droplet contact angle is tip to 110.50 degrees. These materials were applied in the liquid-phase oxidation of cyclohexane with molecular oxygen as oxidant and tert-butyl hydroperoxide as initiator Linder solvent-free conditions. High activity could be obtained with these bifunctionalized catalysts being used. The modification effect of phenyl groups played an important role in the activity enhancement.

引用

页码：2855 / 2860

页数：6

共 34 条

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