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题名: Mesoporous titanosilicates with high loading of titanium synthesized in mild acidic buffer solution
作者: Tang, Jianting1;  Liu, Jian1;  Yang, Jie1;  Feng, Zhaochi1;  Fan, Fengtao1;  Yang, Qihua1
通讯作者: 杨启华
关键词: Mesoporous titanosilicates ;  Buffer solution ;  Ti-SBA-15 ;  Framework titanium species ;  UV resonance Raman
刊名: JOURNAL OF COLLOID AND INTERFACE SCIENCE
发表日期: 2009-07-15
DOI: 10.1016/j.jcis.2009.03.090
卷: 335, 期:2, 页:203-209
收录类别: SCI
文章类型: Article
部门归属: 5
项目归属: 506
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: Mesoporous titanosilicates with high titanium content were synthesized under mild acidic conditions (pH = 4.4, HAc-NaAc buffer solution) by co-condensation of acetylacetone-modified titanium isopropoxide (Ti(OBu '')(3) (acac)) and mixture of sodium silicate with tetramethoxysilane (TMOS) or tetraethoxysilane (TEOS) or tetrakis(2-hydroxyethyl)orthosilicate (EGMS), using block copolymer Pluronic P123 as template. The combined results of XRD, N(2) sorption and TEM show that the highly regular structure of the mesoporous titanosilicates can still be obtained when Ti/Si molar ratio in the final product is as high as 0.059. The results of UV-vis diffuse reflectance spectra and UV resonance Raman spectra show that the framework titanium species are predominant in the mesoporous titanosilicates when Ti/Si molar ratio in the final product is less than 0.042. The mixture of sodium silicate and EGMS was proved to be the best silicon source for the synthesis of titanosilicates with ordered mesostructure and high titanium content. The efficiency of this synthetic method may be attributed to the mild acidic medium as well as the modified hydrolysis-condensation rate and hydrophility of the precursors. (C) 2009 Elsevier Inc. All rights reserved.
关键词[WOS]: MOLECULAR-SIEVES ;  SUBSTITUTED SBA-15 ;  CATALYTIC-ACTIVITY ;  PHOTOCATALYTIC PROPERTIES ;  VISIBLE-LIGHT ;  SILICA ;  COPOLYMER ;  MCM-41 ;  NANOPARTICLES ;  EPOXIDATION
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000266644000007
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/101925
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:
Tang, Jianting,Liu, Jian,Yang, Jie,et al. Mesoporous titanosilicates with high loading of titanium synthesized in mild acidic buffer solution[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2009,335(2):203-209.
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