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题名: Post-grafting preparation of large-pore mesoporous materials with localized high content titanium doping
作者: Hua, ZL;  Bu, WB;  Lian, YX;  Chen, HR;  Li, L;  Zhang, LX;  Li, C;  Shi, JL
通讯作者: Zile Hua
刊名: JOURNAL OF MATERIALS CHEMISTRY
发表日期: 2005
DOI: 10.1039/b413478h
卷: 15, 期:6, 页:661-665
收录类别: SCI
文章类型: Article
部门归属: 5
项目归属: 503
产权排名: 2;3
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: A new post-grafting process, consisting of two steps of substrate preparation and sol - gel post-grafting, has been developed to prepare titanium-doped mesoporous SBA-15 material with a double-layered structure and locally concentrated titanium content at the inner pore surface. With this novel technique, the single phased and originally ordered mesostructures can be well conserved; in the conventional direct synthesis they can be partially damaged when the frameworks are doped with high content heteroatoms. Titanium species exist in an isolated, tetrahedral structure and are localized at the pore surface; this is beneficial to both reactant access and product release. Characterization with XRD, N-2 adsorption/desorption isotherms, HREM/ EDS, ICP, UV - Vis, and the newly developed UV - Raman spectroscopy confirm these results. Preliminary catalytic tests with the selective epoxidation of cyclohexene show good catalytic activity. Among them, sample TiSBA-15-10 with a Si : Ti molar ratio of 10 shows a TON value of 75 and a highest product ( epoxide) yield of 55%.
关键词[WOS]: RESONANCE RAMAN-SPECTROSCOPY ;  MOLECULAR-SIEVE SBA-15 ;  SILICA MIXED OXIDES ;  SOL-GEL ;  CATALYSIS ;  COPOLYMER ;  OXIDATION ;  TRIBLOCK ;  CARBON
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000226703500005
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/93037
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, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Hua, ZL,Bu, WB,Lian, YX,et al. Post-grafting preparation of large-pore mesoporous materials with localized high content titanium doping[J]. JOURNAL OF MATERIALS CHEMISTRY,2005,15(6):661-665.
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