Nonionic triblock copolymer synthesis of SBA-15 above the isoelectric point of silica (pH=2-5)

被引：72
作者：
Cui, XG
Zin, WC
Cho, WJ
Ha, CS [1 ]
机构：
[1] Pusan Natl Univ, Dept Polymer Sci & Engn, Pusan 609735, South Korea
[2] Pohang Univ Sci & Technol, Dept Mat Engn, Pohang 790390, South Korea
[3] Yanbian Univ, Dept Chem Engn, Yanji 133002, Peoples R China
来源：
MATERIALS LETTERS | 2005年 / 59卷 / 18期
基金：
中国国家自然科学基金;
关键词：
nanomaterials; sol-gel preparation; mesoporous silica; isoelectric point of silica; pre-hydrolyze; nonionic triblock copolymer;
D O I：
10.1016/j.matlet.2005.02.073
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Under new mild conditions, above the isoelectric point of silica (pH=2-5), SBA-15 mesoporous silica with ordered hexagonal pores were prepared by pre-hydrolyzing of tetraethyl orthosilicate in the presence of poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol) as a template. Small angle X-ray scattering (SAXS), nitrogen adsorption and desorption experiments, and transmission electron micrograph (TEM) measurements showed well-ordered hexagonal array structure, though there are some changes in wall thickness and density with the increase of pH value from 2 to 5. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：2257 / 2261
页数：5
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