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题名: Pore size control of mesoporous silicas from mixtures of sodium silicate and TEOS
作者: Liu, Jian;  Yang, Qihua;  Zhao, X. S.;  Zhang, Lei
通讯作者: 杨启华
关键词: mesoporous materials ;  large pore size ;  sodium silicate ;  buffer solution
刊名: MICROPOROUS AND MESOPOROUS MATERIALS
发表日期: 2007-11-01
DOI: 10.1016/j.micromeso.2007.02.045
卷: 106, 期:1-3, 页:62-67
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 ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Nanoscience & Nanotechnology ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Science & Technology - Other Topics ;  Materials Science
英文摘要: Mesoporous silicas with large and tunable pore size (10-16nm) were successfully synthesized from mixtures of sodium silicate (Na2SiO3) and tetraethoxysilane (TEOS) in acetic acid/sodium acetate buffer solution (pH 4.4, HAc-NaAc) using poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) (EO20PO70EO20, denoted as P123) as template, in which TEOS acts both as a swelling agent and a silica source. Highly ordered 2-D hexagonal and mesostructured cellular foam structure with large pore size could be obtained using sodium silicate and TEOS as silica source, respectively. By adjusting the initial molar ratio of TEOS/(Na2SiO3+TEOS) from 0 to 0.5, the pore sizes of the final ordered 2-D hexagonal mesoporous silicas could be precisely tuned from 10 to 15 run. The large pore size (15 nm) of the material was attributed to the slow hydrolysis and polymerization rate of TEOS in the buffer solution. The presence of ethanol in the synthesis system also has strong effects on the mesostructure and pore size of the materials. (c) 2007 Elsevier Inc. All rights reserved.
关键词[WOS]: MESOCELLULAR FOAM ;  TEMPERATURE ;  COPOLYMER ;  TRIBLOCK ;  SBA-15 ;  MECHANISM ;  EXPANDERS ;  DESIGN
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000251203400009
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/99185
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.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
3.Natl Univ Singapore, Dept Chem & Biomol Engn, Singapore 119620, Singapore

Recommended Citation:
Liu, Jian,Yang, Qihua,Zhao, X. S.,et al. Pore size control of mesoporous silicas from mixtures of sodium silicate and TEOS[J]. MICROPOROUS AND MESOPOROUS MATERIALS,2007,106(1-3):62-67.
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