A one-step synthesis of mono-dispersed mesoporous silica spheres by using the mixed surfactants CTAB and dodecylamine proceeded with the hydrolysis and condensation of tetraethylorthosilicate (TEOS) in a mixture of alcohol, isopropyl alcohol, water, and ammonia as a catalyst. The silica spheres have high specific
surface area and can be used as a good substrate in high performance liquid
chromatography (HPLC). The size of 0.2～1.5μm and morphology of the silica spheres can be controlled by varying the proportion of surfactant and co-solvent. The prepared silica spheres can be enlarged to the maximum diameter 3μm with a seeded growth method in a semi-batch reacting system. Based on the experiments above, several mechanisms were discussed on the growth
process of mesoporous silica spheres in the synthesis.
QIU Jian-Quan
,
ZHAO Xiang
,
JIN Min-Chao
,
CAI Qiang
,
LI Heng-De
. Synthesis of Mesoporous Silica Spheres by Using Neutral-cationic Surfactant and Semi-batch Growth[J]. Journal of Inorganic Materials, 2006
, 21(3)
: 558
-564
.
DOI: 10.3724/SP.J.1077.2006.00558
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