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题名: Pore size design of ordered mesoporous silicas by controlling micellar properties of triblock copolymer EO(20)PO(70)EO(20)
作者: Zhang, WH;  Zhang, L;  Xiu, JH;  Shen, ZQ;  Li, Y;  Ying, PL;  Li, C
关键词: synthesis ;  mesoporous materials ;  micelle ;  pore size ;  salt effect ;  surfactant
刊名: MICROPOROUS AND MESOPOROUS MATERIALS
发表日期: 2006-02-24
DOI: 10.1016/j.micromeso.2005.09.031
卷: 89, 期:1-3, 页:179-185
收录类别: SCI
文章类型: Article
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: The pore sizes of SBA-15 materials have been reduced continuously by controlling the micelle properties of block copolymer EO(20)PO(70)EO(20) (P123) using the cationic surfactant cetyltrimethylammonium bromide (CTAB) as co-template, and the NH(4)F and KCl as inorganic additives. The resulting SBA-15 materials have been characterized by X-ray diffraction (XRD) patterns, N(2) physical sorption isotherms, and transmission electron microscopy (TEM). Experiments show that the pore sizes of SBA-15 decrease continuously from 8.49 nm to 4.78 nm with the increase of CTAB contents. However, the increase of CTAB contents results in lower structural ordering of the SBA-15 materials synthesized. The addition of F(-) dramatically improves the structural periodicity, but enlarges the pore sizes of the materials at the same time. In contrast, the introduction of KCl into the synthetic system can improve the structural ordering without evident effect on the pore sizes. It is suggested that the changes of micellar properties caused by the auxiliaries (CTAB, KCl, NH(4)F) should be responsible for the variation of the pore sizes of the resultant SBA-15. (c) 2005 Elsevier Inc. All rights reserved.
关键词[WOS]: DIFFERENTIAL SCANNING CALORIMETRY ;  MOLECULAR-SIEVES ;  AQUEOUS-SOLUTIONS ;  BLOCK-COPOLYMER ;  MICELLIZATION ;  SURFACTANTS ;  TEMPLATES ;  OXIDE ;  SALTS ;  REPLICATION
语种: 英语
WOS记录号: WOS:000235441600023
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/140085
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, Dalian 116012, Peoples R China
3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China

Recommended Citation:
Zhang, WH,Zhang, L,Xiu, JH,et al. Pore size design of ordered mesoporous silicas by controlling micellar properties of triblock copolymer EO(20)PO(70)EO(20)[J]. MICROPOROUS AND MESOPOROUS MATERIALS,2006,89(1-3):179-185.
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