Synthesis and size control of uniform, spherically shaped hexagonal mesoporous silica

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Abstract

Spherical hexagonal mesoporous silica (HMS) was prepared at ambient temperature using dodecylamine (DDA) as the template and tetraethyl orthosilicate (TEOS) as the silica source. The properties of the HMS particles were characterised by X-ray powder diffraction, scanning electron microscopy and N2 sorption measurements, and the effects of DDA concentration, stirring speed and rate of TEOS addition were evaluated. The HMS samples exhibited substantial framework-confined and textural mesoporosity. The particle and pore sizes of the spherical HMS decreased with decreasing DDA concentration. With increasing stirring speed, the HMS particle size decreased slightly, and the size distribution narrowed. Increasing the rate of TEOS addition resulted in a decrease in HMS particle size. The findings indicate that DDA concentration, stirring speed and rate of TEOS addition are all important in controlling particle size and shape during HMS synthesis.

Keywords

Hexagonal mesoporous silica Mesoporous material Silicate Spheroids 

Notes

Acknowledgements

This research was supported by the Ministry of Science and Technology, Taiwan.

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© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Chemical and Materials EngineeringNational Central UniversityJhong-LiTaiwan
  2. 2.Department of ChemistryTomsk State UniversityTomskRussia

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