Fast fabrication of hollow silica spheres with thermally stable nanoporous shells

被引：33

作者：

Cheng, Xin

Liu, Shiquan ^{[1
]}

Lu, Lingchao

Sui, Xueye

Meynen, Vera

Cool, Pegie

Vansant, Etienne F.

Jiang, Jianzhuang

机构：

[1] Jinan Univ, Sch Mat Sci & Engn, Jinan 250022, Peoples R China

[2] Univ Antwerp, Lab Adsorpt & Catalysis, B-2610 Antwerp, Belgium

[3] Shandong Univ, Sch Chem & Chem Engn, Jinan 250100, Peoples R China

来源：

MICROPOROUS AND MESOPOROUS MATERIALS | 2007年 / 98卷 / 1-3期

关键词：

hollow spheres; nanopores; silica; fast synthesis; vesicles; gelation;

D O I：

10.1016/j.micromeso.2006.08.014

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Tens of micrometer-sized hollow silica spheres with thermally stable nanoporous shells were synthesized within 5 min, followed by a drying and a calcination step. Most of the nanopores could be retained up to 700 degrees C, and the hollow spherical morphology was remained at least until 950 degrees C. It is proposed that a fast hydrolysis and condensation of tetraethyl orthosilicate take place around multi-lamellar octylamine vesicles. The morphology of the vesicles is then fixed by a quick gelation process, resulting in hollow organo-silica spheres. After the removal of the template by calcination, nanopores are generated in the hollow shells. (C) 2006 Elsevier Inc. All rights reserved.

引用

页码：41 / 46

页数：6

共 38 条

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