期刊
APPLIED SURFACE SCIENCE
卷 256, 期 21, 页码 6191-6198出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2010.03.139
关键词
Composite photocatalyst; Magnetically separable; TiO2; Activated carbon; Soft magnetic ferrite
类别
资金
- State Ministry of Science and Technology [2008BAE64B05, 2006BAJ04A12-4]
- State Key Laboratory of Subtropical Building Science of China [2008ZA09, 2009ZB05]
- Department of Science and Technology of Guangdong Province [2007A032500005]
Magnetically separable composite photocatalysts, TiO2 deposited on soft magnetic ferrite activated carbon (TFAC), were prepared by sol-gel and dip-coating technique. The prepared composites were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), Fourier transform infrared spectra (FTIR), optical absorption spectroscopy, vibrating sample magnetometer (VSM) and nitrogen adsorption. These photocatalysts exhibited enhanced photocatalytic activity compared to Degussa P25 for the degradation of methyl orange (MO) in aqueous solution. The kinetics of MO degradation was well fitted to the Langmuir-Hinshelwood model. The samples showed good magnetic response and could be completely recovered by an external magnet. Furthermore, the photocatalysts could maintain high photocatalytic activity after five cycles, and the degradation rate of MO was still close to 90%. Crown Copyright (C) 2010 Published by Elsevier B.V. All rights reserved.
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