Recyclable magnetic CoFe2O4/BiOX (X = Cl, Br and I) microflowers for photocatalytic treatment of water contaminated with methyl orange, rhodamine B, methylene blue, and a mixed dye

Title
Recyclable magnetic CoFe2O4/BiOX (X = Cl, Br and I) microflowers for photocatalytic treatment of water contaminated with methyl orange, rhodamine B, methylene blue, and a mixed dye
Author(s)
손영구최영인김영일조대원강정수[강정수]캄통리융[캄통리융]
Keywords
ASSISTED SOLVOTHERMAL SYNTHESIS; VISIBLE-LIGHT IRRADIATION; COMPOSITE PHOTOCATALYST; AQUEOUS-SOLUTION; IONIC LIQUID; BIOX X; EFFICIENT; DEGRADATION; MICROSPHERES; NANOSTRUCTURES
Issue Date
201509
Publisher
ROYAL SOC CHEMISTRY
Citation
RSC ADVANCES, v.5, no.97, pp.79624 - 79634
Abstract
The recycling of photocatalysts and improving their activities by hybridizing two materials are important. Herein, nanosize ferromagnetic (Ms = 62.3 emu g(-1)) CoFe2O4 nanoparticles (NPs) were embedded into nanosize-assembled BiOX (X = Cl, Br and I) microflowers and examined by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, UV-visible absorption spectroscopy, Fourier-transform infrared spectroscopy, and photoluminescence spectroscopy. The adsorption and photocatalytic performance of CoFe2O4/BiOX for methyl orange (MO), rhodamine B (RhB), methylene blue (MB), and a mixed dye (MO + RhB + MB) were examined under UV and visible light irradiation. The adsorption capacity of CoFe2O4/BiOI for RhB was 160 mg gcat(-1), which is significantly larger than the <5 mg gcat(-1) obtained for CoFe2O4/BiOCl and CoFe2O4/BiOBr. The photocatalytic activity was observed in the order of CoFe2O4/BiOBr < CoFe2O4/BiOCl < CoFe2O4/BiOI for RhB. Their adsorption and photocatalytic performances were also investigated with pure MO, pure MB and a mixed dye. MO in the mixed dye was the most easily removed by the catalysts under light exposure. Based on the scavenger tests, h+ and cO(2)-play major and minor roles in the photodegradation of the dyes, respectively. Although the (OH)-O-center dot radical was formed for CoFe2O4/BiOBr and CoFe2O4/BiOCl, it has a much smaller role than the other active species.
URI
http://hdl.handle.net/YU.REPOSITORY/31037http://dx.doi.org/10.1039/c5ra17616f
ISSN
2046-2069
Appears in Collections:
이과대학 > 화학생화학부 > Articles
문과대학 > 중국언어문화학과 > Articles
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