Fabrication of mesoporous silica hollow spheres using triblock copolymer PEG-PPG-PEG as template

被引：32
|
作者：
Wang, Xian [1 ]
Miao, Xinrui [1 ]
Li, Zhuomin [1 ]
Deng, Wenli [1 ]
机构：
[1] S China Univ Technol, Coll Mat Sci & Engn, Guangzhou 510640, Peoples R China
来源：
JOURNAL OF NON-CRYSTALLINE SOLIDS | 2010年 / 356卷 / 18-19期
关键词：
Mesoporous; Hollow silica spheres; Emulsion; Template; NANOPARTICLES; SHELLS; SIZE;
D O I：
10.1016/j.jnoncrysol.2009.12.029
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
We report a single-step, emulsion-templating method using triblock copolymer poly(ethylene glycol)-poly( propylene glycol)-poly(ethylene glycol) (PEG-PPG-PEG) as template, sodium silicate or tetraethylorthosilicate (TEOS) as precursor and n-octane and benzyl alcohol as cosolvents. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) results revealed that ordered mesoporous silica hollow microspheres with thickness of shell about 50 rim and mean diameter 1 pm were prepared by changing the concentration of the reactant, pH and reaction time. Brunauer-Emmett-Teller (BET) analysis confirmed that silica hollow microspheres were porous. Generally, the hierarchical structures of mesoporous silica can be regulated from hollow spheres to solid particles by changing the concentration of benzyl alcohol. This methodology provides a versatile and effective route for preparation of mesoporous hollow materials. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：898 / 905
页数：8
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