Decoupling particle formation from intraparticle ordering in mesostructured silica colloids
Journal article, 2011
A synthesis methodology that decouples the formation of silica particles from their internal mesoordering has been developed. This was possible by employing synthesis conditions that combine fast nucleation and growth of particles with slow silica condensation. The synthesis developed is based on an inorganic silica source and the nonionic block copolymer Pluronic P123 using a synthesis pH of 3 and conditions that result in a stable colloidal suspension. Using a two-step procedure the particles can be first formed and then triggered into developing an ordered internal mesostructure by subsequent addition of silica or Pluronic. This is possible because under the conditions employed the particles are stabilized by relatively weak interactions before the formation of a stable silica network. (C) 2011 Elsevier Inc. All rights reserved.
x-ray-scattering
Mesoporous silica
initial-stages
suspensions
mesoporous silica
SBA-15
copolymer
ovencher sw
p229
Inorganic silica source
Formation mechanism
1982
v27
triblock
synthesis
formation mechanism
sba-15
Colloidal particles
Author
Andreas Sundblom
Chalmers, Chemical and Biological Engineering, Applied Surface Chemistry
C. L. P. Oliveira
University of Sao Paulo (USP)
Aarhus University
J. S. Pedersen
Aarhus University
Anders Palmqvist
Chalmers, Chemical and Biological Engineering, Applied Surface Chemistry
Microporous and Mesoporous Materials
1387-1811 (ISSN)
Vol. 145 1-3 59-64Subject Categories
Chemical Sciences
DOI
10.1016/j.micromeso.2011.04.025