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Indexed by:期刊论文

Date of Publication:2014-03-01

Journal:MICROPOROUS AND MESOPOROUS MATERIALS

Included Journals:SCIE、EI、Scopus

Volume:186

Page Number:7-13

ISSN No.:1387-1811

Key Words:Core/shell; Magnetic separation; Mesoporous; Fenton-like

Abstract:A core/shell structured gamma-Fe2O3@Ti-tmSiO(2) nanocomposite with enhanced activity for the degradation of dyes that is capable of fast magnetic separation has been successfully prepared by a sol-gel process followed with calcination. The obtained core/shell structure is composed of a superparamagnetic core with a strong response to external fields, and an outer layer of porous titanium silicate with a tunable porous sizes. The convenient control over the pore size and the thickness of porous silica containing titanium species may make it possible to adsorb and catalyze molecules with different sizes. The presence of porous SiO2 helps to enhance the chemical and thermal stability of gamma-Fe2O3 core. It is demonstrated that the core gamma-Fe2O3 as a Fenton-like catalyst exhibits good performance, while the Ti4+ existing in the porous shell also gives obvious activity in the degradation of dyes. The composite gamma-Fe2O3@Ti-tmSiO(2) possesses enhanced activity for the treatment of pollutants in water. (C) 2013 Elsevier Inc. All rights reserved.