A simple approach to prepare monodisperse mesoporous silica nanospheres with adjustable sizes

Yu, Meihua, Zhou, Liang, Zhang, Jun, Yuan, Pei, Thorn, Peter, Gu, Wenyi and Yu, Chengzhong (2012) A simple approach to prepare monodisperse mesoporous silica nanospheres with adjustable sizes. Journal of Colloid and Interface Science, 376 1: 67-75. doi:10.1016/j.jcis.2012.03.014


Author Yu, Meihua
Zhou, Liang
Zhang, Jun
Yuan, Pei
Thorn, Peter
Gu, Wenyi
Yu, Chengzhong
Title A simple approach to prepare monodisperse mesoporous silica nanospheres with adjustable sizes
Journal name Journal of Colloid and Interface Science   Check publisher's open access policy
ISSN 0021-9797
1095-7103
Publication date 2012-06-01
Year available 2012
Sub-type Article (original research)
DOI 10.1016/j.jcis.2012.03.014
Open Access Status Not yet assessed
Volume 376
Issue 1
Start page 67
End page 75
Total pages 9
Place of publication Maryland Heights MO, United States
Publisher Academic Press
Language eng
Subject 2504 Electronic, Optical and Magnetic Materials
2502 Biomaterials
2508 Surfaces, Coatings and Films
1505 Colloid and Surface Chemistry
Abstract A new and facile approach has been developed to prepare monodisperse mesoporous silica nanospheres (MMSNs) with controlled particle sizes and pore structures. In our approach, MMSNs were synthesized simply in a sodium acetate solution without adding any other alkali or alcohol additives. MMSNs have a spherical shape and uniform particle sizes, which can be adjusted from 50 to 110 nm by increasing the reaction temperature from 40 to 80 degrees C. By performing a subsequent hydrothermal treatment (HT) under basic condition (pH =similar to 11.5) at 130 degrees C, the mesoporous pore volume and surface area can be enhanced, while keeping the mono-dispersion characteristics and the mesopore size almost unchanged. The pore sizes of MMSNs can be adjusted from 2.8 to 4.0 nm under acidic solutions by changing the HT temperature from 100 to 130 degrees C. The formation process of MMSNs has been investigated by transmission electron microscopy (TEM) and attenuated total reflection Fourier transform infrared (ATR-FTIR) techniques. A spherical micelle templating mechanism is proposed to explain the formation of MMSNs in our system, which is different from that of traditional highly ordered mesoporous silica nanoparticles (MCM-41). (C) 2012 Elsevier Inc. All rights reserved.
Formatted abstract
A new and facile approach has been developed to prepare monodisperse mesoporous silica nanospheres (MMSNs) with controlled particle sizes and pore structures. In our approach, MMSNs were synthesized simply in a sodium acetate solution without adding any other alkali or alcohol additives. MMSNs have a spherical shape and uniform particle sizes, which can be adjusted from 50 to 110 nm by increasing the reaction temperature from 40 to 80 °C. By performing a subsequent hydrothermal treatment (HT) under basic condition (pH = ∼11.5) at 130 °C, the mesoporous pore volume and surface area can be enhanced, while keeping the mono-dispersion characteristics and the mesopore size almost unchanged. The pore sizes of MMSNs can be adjusted from 2.8 to 4.0 nm under acidic solutions by changing the HT temperature from 100 to 130 °C. The formation process of MMSNs has been investigated by transmission electron microscopy (TEM) and attenuated total reflection Fourier transform infrared (ATR-FTIR) techniques. A spherical micelle templating mechanism is proposed to explain the formation of MMSNs in our system, which is different from that of traditional highly ordered mesoporous silica nanoparticles (MCM-41).
Keyword Mesoporous silica
Monodisperse spheres
Self-assembly
Hydrothermal treatment
Formation mechanism
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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