文章基本信息

标题：Differential Selective Etching of Functional Groups Strategy for Preparation of Organic Hollow Porous Silica
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作者：Jie Li ; Jia Zhang ; ZhuoQiong Wen 等
期刊名称：E3S Web of Conferences
印刷版ISSN：2267-1242
电子版ISSN：2267-1242
出版年度：2021
卷号：252
页码：1-4
DOI：10.1051/e3sconf/202125202051
语种：English
出版社：EDP Sciences
摘要：In this study, different structural of organic hollow porous silica were prepared based on differential selective etching of functional groups strategy, using ammonia as catalyst, cetyltrimethylammonium bromide (CTAB) as pore-forming agent and emulsifier, cyano silica (CN-SiO2) or vinyl silica (V-SiO2) formed by hydrolysis condensation of 2-cyanoethyl triethoxysilane (CTES) or vinyl triethoxysilane (VTES) were used as cores, NH-SiO2 prepared by 3-aminopropyl triethoxysilane (APTES), SH-SiO2prepared by mercaptopropyl trimethoxysilane (MPTMS) and UD-SiO2prepared by urea-propyl triethoxysilane (UPTES) as shells, separately. The morphology and structure of the products were characterized by scanning electron microscopy(SEM) and transmission electron microscopy(TEM). The study results showed that CN-SiO2as core was considered to be benefit for the preparation of organic hollow porous silica compared to V-SiO2as core. In addition, core-shell structure obtained from CN-SiO2NH-SiO2tend to be changed into hollow porous structure in alkaline condition on account of differential selective etching of functional groups strategy.