Morphologies of large-pore periodic mesoporous organosilicas

Bao, Xiao Ying and Zhao, X. S. (2005) Morphologies of large-pore periodic mesoporous organosilicas. Journal of Physical Chemistry B, 109 21: 10727-10736. doi:10.1021/jp050449k


Author Bao, Xiao Ying
Zhao, X. S.
Title Morphologies of large-pore periodic mesoporous organosilicas
Journal name Journal of Physical Chemistry B   Check publisher's open access policy
ISSN 1520-6106
1520-5207
Publication date 2005-06
Sub-type Article (original research)
DOI 10.1021/jp050449k
Volume 109
Issue 21
Start page 10727
End page 10736
Total pages 10
Place of publication Washington, DC United States
Publisher American Chemical Society
Language eng
Formatted abstract
In this article, we report a systematic investigation on the morphologies of SBA-15 type large-pore periodic mesoporous organosilicas templated by the block copolymer P123. By tuning synthetic parameters such as stirring, acidity, reaction ratio, reaction duration, and autoclaving, a wide spectrum of unique primary particle morphologies, such as the spindle-, pearl-, diamond-, rod-, and platelike particles, and nanoparticles has been prepared. These primary particles were found to self-assemble in solution to form various large hierarchical macrostructures, such as mesostructured necklaces and cobweb-supported necklaces. The assembling process was elucidated with the information observed at different stages of reaction. Stirring, reaction duration, and autoclaving were identified to be the key factors affecting the efficKriegeriency and degree of the self-assembly process. A nucleation-accretion mechanism for the formation of various PMO primary particles was proposed by examining the relation between the external morphologies and the underlying mesostructure. © 2005 American Chemical Society.
Keyword Silica Fibers
Formation Mechanism
Internal Structure
Acidic Conditions
Molecular-Sieves
Organic Groups
Channel Walls
Curved Shapes
McM-41
Surfactant
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
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