title: Preparation and photocatalytic properties of nanometer-sized magnetic TiO2/SiO2/CoFe2O4 composites.
abstract: Magnetic TiO2/SiO2/CoFe2O4 nanoparticles (TiO2/SCFs) were prepared by a sol-gel process in a reverse microemulsion combined with solvent-thermal technique. TiO2/SCFs were characterized by Fourier transform infrared spectrometry, thermogravimetric analysis-differential scanning calorimetry, X-ray diffraction, Raman spectrometry, TEM, BET specific surface area measurement, and magnetic analysis. Structure analyses indicated that TiO2/SCFs presented a core-shell structure with TiO2 uniformly coating on SiO2/CoFe2O4 nanomagnets (SCFs) and typical ferromagnetic hysteresis. TiO2/SCFs showed larger specific surface area and better photocatalytic activities than TiO2 and TiO2/CoFe2O4 photocatalysts prepared by the same method. The doping interaction between TiO2 and CoFe2O4 reduced thanks to the inert SiO2 mesosphere.
authors.affiliation: School of Chemical Engineering and the Environment, Beijing Institute of Technology No. 5 South Zhongguancun Street, Beijing 100081, P. R. China.
authors.forename: Hansheng
authors.initials: H
authors.lastname: Li
authors.forename: Yaping
authors.initials: Y
authors.lastname: Zhang
authors.forename: Qin
authors.initials: Q
authors.lastname: Wu
authors.forename: Xitao
authors.initials: X
authors.lastname: Wang
authors.forename: Changhao
authors.initials: C
authors.lastname: Liu