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题名: Direct synthesis and characterization of titanium-substituted mesoporous molecular sieve SBA-15
作者: Zhang, WH;  Lu, JQ;  Han, B;  Li, MJ;  Xiu, JH;  Ying, PL;  Li, C
刊名: CHEMISTRY OF MATERIALS
发表日期: 2002-08-01
DOI: 10.1021/cm011686c
卷: 14, 期:8, 页:3413-3421
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Materials Science
英文摘要: Ti-substituted mesoporous SBA-15 (Ti-SBA-15) materials have been synthesized by using a new approach in which the hydrolysis of the silicon precursor (tetramethoxysilane, TMOS) is accelerated by fluoride. These materials were characterized by powder X-ray diffraction patterns (XRD), X-ray fluorescence spectroscopy (Y-RF), N-2 sorption isotherms, diffuse-reflectance UV-visible (UV-vis) and UV-Raman spectroscopy, Si-29 MAS NMR, and the catalytic epoxidation reaction of styrene. Experiments show that Ti-SBA-15 samples of high quality can be obtained under the following conditions: F/Si greater than or equal to 0.03 (molar ratio), pH less than or equal to 1.0, aging temperature less than or equal to 80 degreesC, and Ti/Si less than or equal to 0.01. It was found that the hydrolysis rate of TMOS was remarkably accelerated by fluoride, which was suggested to play the main role in the formation of Ti-SBA-15 materials of high quality. There is no stoichiometric incorporation of Ti, and the Ti contents that are obtained are quite low in the case of the approach that is proposed. The calcined Ti-SBA-15 materials show highly catalytic activity in the epoxidation of styrene.
关键词[WOS]: RESONANCE RAMAN-SPECTROSCOPY ;  CATALYTIC ACTIVITY ;  HYDROGEN-PEROXIDE ;  AMORPHOUS SILICA ;  LIQUID-CRYSTALS ;  PHASE-BEHAVIOR ;  TS-1 ZEOLITE ;  ACID GROUPS ;  MCM-41 ;  COPOLYMER
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000177704900028
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/84941
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
2.Dalian Univ Technol, State Key Lab Fine Chem Engn, Dalian 116012, Peoples R China

Recommended Citation:
Zhang, WH,Lu, JQ,Han, B,et al. Direct synthesis and characterization of titanium-substituted mesoporous molecular sieve SBA-15[J]. CHEMISTRY OF MATERIALS,2002,14(8):3413-3421.
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