Effect of surface functionalization on synthesis of mesoporous silica core/shell particles

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• 作者：Milan P. Nikoli膰^a ; Konstantinos P. Giannakopoulos^b ; Milo&scaron ; Bokorov^c ; Vladimir V. Srdi膰^a ; ^{srdicvv@uns.ac.rs}
• 关键词：Core/shell particles ; Silica ; Assembling ; Mesoporous ; Functionalization
• 刊名：Microporous and Mesoporous Materials
• 出版年：2012
• 期刊代码：78_13871811
• 类别：ch
• 出版时间：1 June, 2012
• 卷：155
• 期：Complete
• 页码：8-13
• 文件大小：1598 K

摘要

A pure and simple procedure for preparation of silica core/shell particles is reported. Core/shell particles were formed by assembling the primary silica nanoparticles synthesized by neutralization of highly basic sodium silicate solution, on the surface of monodispersed silica core (average size 鈭?.4 渭m). The core particles were prepared by hydrolysis and condensation of tetraethylorthosilicate. To improve assembling of primary silica particles on the surface of silica core particles, the latter were functionalized with 3-aminopropyltriethoxysilane (APTES) or poly(diallyldimethylammonium chloride) (PDDA). The obtained particles have mesoporous, relatively uniform and continuous silica shell and were prepared without pore-forming agents. The pore size and volume are easily adjustable by controlling the formation of primary silica nanoparticles during synthesis of core/shell particles.