Synthesis of Mesoporous Silica Spheres by Using Neutral-cationic Surfactant and Semi-batch Growth

doi:10.3724/SP.J.1077.2006.00558

Abstract

Abstract: 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.

Key words: mesoporous, silica spheres, surfactant, semi-batch

CLC Number:

TQ174
426

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, DOI: 10.3724/SP.J.1077.2006.00558.

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Synthesis of Mesoporous Silica Spheres by Using Neutral-cationic Surfactant and Semi-batch Growth

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