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题名: Identifying framework titanium in TS-1 zeolite by UV resonance Raman spectroscopy
作者: Li, C;  Xiong, G;  Liu, JK;  Ying, PL;  Xin, Q;  Feng, ZC
刊名: JOURNAL OF PHYSICAL CHEMISTRY B
发表日期: 2001-04-19
卷: 105, 期:15, 页:2993-2997
收录类别: SCI
文章类型: Article
部门归属: 5064
项目归属: 503
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: Framework titanium in Ti-silicalite-1 (TS-1) zeolite was selectively identified by its resonance Raman bands using ultraviolet (W) Raman spectroscopy. Raman spectra of the TS-1 and silicalite-1 zeolites were obtained and compared using continuous wave laser lines at 244, 325, and 488 nm as the excitation sources. It was only with the excitation at 244 nm that resonance enhanced Raman bands at 490, 530, and 1125 cm(-1) appeared exclusively for the TS-1 zeolite. Furthermore, these bands increased in intensity with the crystallization time of the TS-1 zeolite. The Raman bands at 490, 530, and 1125 cm(-1) are identified as the framework titanium species because they only appeared when the laser excites the charge-transfer transition of the framework titanium species in the TS-1. No resonance Raman enhancement was detected for the bands of silicalite-1 zeolite and for the band at 960 cm(-1) of TS-1 with any of the excitation sources ranging from the visible tb UV regions. This approach can be applicable for the identification of other transition metal ions substituted in the framework of a zeolite or any other molecular sieve.
关键词[WOS]: CATALYTIC-OXIDATION ;  TI-SILICALITE ;  AB-INITIO ;  HYDROXYLATION ;  SILICATES ;  PHENOL ;  SITES ;  ADSORPTION ;  MOLECULES ;  SPECTRA
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000168257700019
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/92095
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,Xiong, G,Liu, JK,et al. Identifying framework titanium in TS-1 zeolite by UV resonance Raman spectroscopy[J]. JOURNAL OF PHYSICAL CHEMISTRY B,2001,105(15):2993-2997.
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