One-step synthesis of core-shell structured mesoporous silica spheres templated by protic ionic liquid and CTAB

摘要

Core-shell structured mesoporous silica spheres were successfully fabricated by utilizing cetyltrimethyl ammonium bromide (CTAB) and protic ionic liquid (butylamine acetate) as the co-templates. The obtained samples were characterized by N-2 gas sorption, scanning electron microscope (SEM) and transmission electron microscopy (TEM). The results established that silica spheres possessed smaller pores in the shell and larger mesopores in the core. The formation mechanism of the silica sphere which is based on the interaction between protic ionic liquid (PIL) and CTAB is tentatively elucidated. And it is valuable to develop this facile route and the mesoporous silica spheres can be beneficial for a wide range of applications. (C) 2016 Elsevier B.V. All rights reserved.