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

Date
2015
Advisor
Instructor
Source Title
Journal of Materials Chemistry A
Print ISSN
2050-7488
Electronic ISSN
Publisher
Royal Society of Chemistry
Volume
3
Issue
7
Pages
3839 - 3846
Language
English
Type
Article
Journal Title
Journal ISSN
Volume Title
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.

Course
Other identifiers
Book Title
Keywords
Dissolution, Mesoporous materials, Nanorods, Shells (structures), Silica, Adsorption and desorptions, Core-shell nanoparticles, Core-shell nanosphere, Hollow mesoporous silica nanoparticles, One-pot reaction, Phosphate-buffered salines, Porosity difference, Selective dissolution, Nanoparticles
Citation
Published Version (Please cite this version)