Abstract
A new N-[3-(trimethoxysilyl)propyl]ethylenediamine-functionalized hollow mesoporous silica sphere (DA-HMSS) was synthesized by a two-step self-templating method, including hydrolysis and co-condensation of tetraethyl orthosilicate and N-[3-(trimethoxysilyl)propyl]ethylenediamine in the presence of ammonia solution and hexadecyltrimethylammonium bromide, following with hydrothermal incubation in pure water after the removal of hexadecyltrimethylammonium bromide. The successful formation of silica framework and incorporation of organic component in DA-HMSS were confirmed by Fourier transform infrared and solid-state 29Si cross-polarization/magic-angle-spinning nuclear magnetic resonance spectroscopic measurements as well as CHN elemental analysis. The hollow morphology of DA-HMSS was revealed by transmission electron microscopy, whereas its porosity was disclosed by nitrogen adsorption–desorption isotherm measurement. Furthermore, its carbon dioxide adsorption capability was also investigated.
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