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题名: Preparation, characterization and photocatalytic properties of singly and doubly titania-modified mesoporous silicate MCM-41 by varying titanium precursors
作者: Zheng, S;  Gao, L;  Zhang, QH;  Zhang, WP;  Guo, JK
刊名: JOURNAL OF MATERIALS CHEMISTRY
发表日期: 2001
卷: 11, 期:2, 页:578-583
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: A series of titania-modified MCM-41 have been synthesized from varying three kinds of titanium precursors [Ti(OBun)(4), Ti(OBun)(3)(acac), Ti(OBun)(2)(acac)(2)] respectively and mesoporous molecular sieve MCM-41, in which titania existed as single or double layers. The samples were characterized by powder X-ray diffraction (XRD), nitrogen adsorption-desorption at 77 K, Si-29 MAS NMR, FTIR and Raman spectroscopy, as well as by solid state diffuse reflectance UV-VIS spectroscopy. The titanium precursor was cocondensed with the active silanol groups of MCM-41 via Si-O-Ti bonds and the resulting titania modified the mesopore walls of MCM-41 after hydrolysis and calcination. In the titania-modified MCM-41 samples, although the titania species were in an amorphous state and in tetrahedral coordination rather than octahedral coordination, which exists extensively in crystalline titania, they exhibited high photocatalytic activity for the photodecomposition of phenol and the photoreduction of Cr(vi) to Cr(iii).
关键词[WOS]: SOL-GEL METHOD ;  MOLECULAR-SIEVES ;  RAMAN-SPECTROSCOPY ;  OXIDE CATALYSTS ;  SURFACE ;  OXIDATION ;  EPOXIDATION ;  COMPLEXES ;  DIOXIDE ;  NMR
语种: 英语
WOS记录号: WOS:000167139700058
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/138875
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:
Zheng, S,Gao, L,Zhang, QH,et al. Preparation, characterization and photocatalytic properties of singly and doubly titania-modified mesoporous silicate MCM-41 by varying titanium precursors[J]. JOURNAL OF MATERIALS CHEMISTRY,2001,11(2):578-583.
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