Hydrothermal Synthesis of Hollow Silica Spheres under Acidic Conditions

被引：140

作者：

Yu, Qiyu ^{[1
]}

Wang, Pengpeng ^{[1
]}

Hu, Shi ^{[1
]}

Hui, Junfeng ^{[1
]}

Zhuang, Jing ^{[1
]}

Wang, Xun ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China

来源：

LANGMUIR | 2011年 / 27卷 / 11期

关键词：

AMORPHOUS SILICA; MESOPOROUS SHELL; STOBER SILICA; NANOPARTICLES; CORE; FABRICATION; NANORATTLE; SOLUBILITY; PARTICLES; MICROCAPSULES;

D O I：

10.1021/la200719g

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

It is well-known that silica can be etched in alkaline media or in a unique hydrofluoric acid (HF) solution, which is widely used to prepare various kinds of hollow nanostructures (including silica hollow structures) via silica-templating methods. In our experiments, we found that stober silica spheres could be etched in generic acidic media in a well-controlled way under hydrothermal conditions, forming well-defined hollow/rattle-type silica spheres. Furthermore, some salts such as NaCl and Na(2)SO(4) were found to be favorable for the formation of hollow/rattle-type silica spheres.

引用

页码：7185 / 7191

页数：7

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