Facile synthesis of magnetic hollow mesoporous silica spheres with assembled shell by nanosheets as an excellent adsorbent

摘要

Adsorption technology has been widely employed to deal with wasterwater. In order to enhance adsorption rate and capacity, magnetic hollow mesoporous silica spheres (MHMSS) was synthesized by a facile solvothermal method, which SiO2 sheets assembled as the shell. Monodispersed nanosized Zn-doped Fe3O4 particles (about 2-3 nm) were synthesized on the SiO2 sheets. MHMSS exhibits superior adsorption capacity and high selectivity toward cationic dye of MB adsorption. Significantly, it took about only 1 min to reach the adsorption equilibrium. The experimental results indicate that this kind of structure may be a promising adsorbent for highly effective pollutant removing. (C) 2018 Elsevier B.V. All rights reserved.