Pore size design of ordered mesoporous silicas by controlling micellar properties of triblock copolymer EO(20)PO(70)EO(20)

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	Pore size design of ordered mesoporous silicas by controlling micellar properties of triblock copolymer EO(20)PO(70)EO(20)
	W. H. Zhang; L. Zhang; J. H. Xiu; Z. Q. Shen; Y. Li; P. L. Ying; C. Li
	2006
发表期刊	Microporous and Mesoporous Materials
ISSN	1387-1811
卷号	89 期号:1-3 页码:179-185
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.
部门归属	chinese acad sci, dalian inst chem phys, state key lab catalysis, dalian 116023, peoples r china. dalian univ technol, state key lab fine chem, dalian 116012, peoples r china. chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;li, c (reprint author), chinese acad sci, dalian inst chem phys, state key lab catalysis, 457 zhongshan rd, dalian 116023, peoples r china;canli@dicp.ac.cn
关键词	Synthesis Mesoporous Materials Micelle Pore Size Salt Effect Surfactant Differential Scanning Calorimetry Molecular-sieves Aqueous-solutions Block-copolymer Micellization Surfactants Templates Oxide Salts Replication
URL	查看原文
WOS记录号	WOS:000235441600023
引用统计	被引频次：68[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/34712
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	W. H. Zhang,L. Zhang,J. H. Xiu,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.
APA	W. H. Zhang.,L. Zhang.,J. H. Xiu.,Z. Q. Shen.,Y. Li.,...&C. Li.(2006).Pore size design of ordered mesoporous silicas by controlling micellar properties of triblock copolymer EO(20)PO(70)EO(20).Microporous and Mesoporous Materials,89(1-3),179-185.
MLA	W. H. Zhang,et al."Pore size design of ordered mesoporous silicas by controlling micellar properties of triblock copolymer EO(20)PO(70)EO(20)".Microporous and Mesoporous Materials 89.1-3(2006):179-185.