Issue 7, 2015

A porosity difference based selective dissolution strategy to prepare shape-tailored hollow mesoporous silica nanoparticles

Abstract

This article reports a general method to prepare hollow mesoporous silica nanoparticles with tailored morphology. The method is based on selective dissolution of porous cores of solid silica shell/porous silica core nanoparticles under mild conditions without the need for corrosive or toxic etchants. First, core–shell nanospheres or nanorods are prepared in a one-pot reaction. Then, mesoporous cores of the nanoparticles are selectively dissolved by incubating them in phosphate buffered saline (PBS) at 65 °C for one day. Surprisingly, shells of the resulting hollow particles contain both small and large mesopores which makes the particles very suitable for adsorption and desorption of a wide range of molecules. In addition, we proposed a mechanism for selective dissolution of porous cores of the core–shell nanoparticles.

Graphical abstract: A porosity difference based selective dissolution strategy to prepare shape-tailored hollow mesoporous silica nanoparticles

Supplementary files

Article information

Article type
Paper
Submitted
15 Nov 2014
Accepted
22 Dec 2014
First published
23 Dec 2014

J. Mater. Chem. A, 2015,3, 3839-3846

Author version available

A porosity difference based selective dissolution strategy to prepare shape-tailored hollow mesoporous silica nanoparticles

A. Yildirim and M. Bayindir, J. Mater. Chem. A, 2015, 3, 3839 DOI: 10.1039/C4TA06222A

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