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题名: Epoxidation of olefins on catalysts with highly isolated transition metal ions
作者: Li, C
关键词: olefin ;  epoxidation ;  highly isolated transition metal ion ;  framework atom ;  ion beam implantation ;  chemical grafting ;  ultraviolet Raman spectroscopy ;  styrene ;  cyclohexene
刊名: CHINESE JOURNAL OF CATALYSIS
发表日期: 2001-09-01
卷: 22, 期:5, 页:479-483
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: The framework transition metal ions in microporous and mesoporous materials such as Ti-Silicalite-1 (TS-1), Fe-ZSM-5 and V-MCM-41 have been identified based on the UV resonance Raman spectroscopy. It is pointed out that the conventionally used IR (Raman) band at 960 cm(-1) is not directly associated with the framework titanium ions in TS-1, while a resonance Raman band at 1125 cm(-1) is found to be essentially due to the asymmetric vibration of framework Ti-O-Si. To mimic the highly isolated transition metal ions in the framework of zeolites, Ti/SiO2, Fe/SiO2 and V/SiO2 catalysts were prepared using ion beam implantation and Ti/SiO2 and Si/Ti/SiO2 catalysts were prepared by chemical grafting. These catalysts show pretty high activity and selectivity for the epoxidation of styrene and cyclohexene using H2O2 as the oxidant. This work further confirms that the highly isolated transition metal ions are selective and active for the selective oxidation using H2O2 (ROOH) as the oxidant and the catalysts with highly isolated transition metal ions can be prepared with alternative methods instead of zeolitic synthesis.
关键词[WOS]: TITANIUM ;  STYRENE ;  TS-1
语种: 英语
WOS记录号: WOS:000171867100018
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/138829
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Li, C. Epoxidation of olefins on catalysts with highly isolated transition metal ions[J]. CHINESE JOURNAL OF CATALYSIS,2001,22(5):479-483.
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