TiO2@(AC/Fe3O4) (AC is activated carbon) was prepared by using AC and Fe3O4 as joint support. The morphological features, crystal structure, and magnetism of the final product were characterized. The results indicate that TiO2 particles formed on the surface of AC and Fe3O4; the sizes of TiO2 and Fe3O4 were 0.5 and 0.7 μm respectively, and that of AC fell within a wide range. The highly crystalline cubic structures of the TiO2 particles was in accord with the standard X-ray diffractometry spectrum of magnetite and anatase. The maximum saturation magnetization of TiO2@(AC/Fe3O4) was 75 emu g−1, which was enough to support magnetic recovery. The rate of methylene blue (MB) removal photocatalyzed by TiO2@(AC/Fe3O4) was higher by 50% than that achieved with AC/Fe3O4 photocatalysis, and similar to that achieved with TiO2@AC. The removal rate (kobs) decreased drastically from 1.77 × 10−2 to 9.36 × 10−3min−1 when the initial concentration of MB solution increased from 2.0 to 5.0 mg L−1. The kobs value increased from 9.41 × 10−3 to 1.34 × 10−2min−1 with increasing photocatalyst dosage from 0.2 to 1.0 g, then slightly decreased to 1.33 × 10−2min−1 at 2.0 g dosage.
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Research Article|
March 08 2014
A novel synthesis method for TiO2 particles with magnetic Fe3O4 cores Available to Purchase
Qi Dong;
Qi Dong
1Laboratory of Agro-Waste to Resource/Scientific Observing and Experimental Station of Dali, Institute of Agro-environmental Protection, Ministry of Agriculture; Key Laboratory of Production Environment and Agro-product Safety, Ministry of Agriculture; Tianjin Key Laboratory of Agro-environment and Agro-product Safety, Tianjin 300191, China
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Keqiang Zhang;
1Laboratory of Agro-Waste to Resource/Scientific Observing and Experimental Station of Dali, Institute of Agro-environmental Protection, Ministry of Agriculture; Key Laboratory of Production Environment and Agro-product Safety, Ministry of Agriculture; Tianjin Key Laboratory of Agro-environment and Agro-product Safety, Tianjin 300191, China
E-mail: [email protected]
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Yi An
Yi An
1Laboratory of Agro-Waste to Resource/Scientific Observing and Experimental Station of Dali, Institute of Agro-environmental Protection, Ministry of Agriculture; Key Laboratory of Production Environment and Agro-product Safety, Ministry of Agriculture; Tianjin Key Laboratory of Agro-environment and Agro-product Safety, Tianjin 300191, China
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Water Sci Technol (2014) 69 (10): 2093–2098.
Article history
Received:
July 01 2013
Accepted:
February 24 2014
Citation
Qi Dong, Keqiang Zhang, Yi An; A novel synthesis method for TiO2 particles with magnetic Fe3O4 cores. Water Sci Technol 1 May 2014; 69 (10): 2093–2098. doi: https://doi.org/10.2166/wst.2014.121
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