Journal
CHEMOSPHERE
Volume 197, Issue -, Pages 241-250Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2018.01.053
Keywords
Heteropoly blue; Photo-Fenton-like catalyst; Flocculation; Degradation; Dye wastewater
Categories
Funding
- State Key Laboratory of Coordination Chemistry of Nanjing University
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- College and University Graduate Research Innovation Project of Jiangsu Province
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A environment-friendly 3D inorganic heteropoly blue (HPB) Ba2Na2 [(HPW4W8O40)-W-V-O-VI]center dot 26H(2)O was directly synthesized by hydrothermal method and characterized by means of ICP, IR, XPS, X-ray single crystal and X-ray powder diffraction. It was an efficient heterogeneous photo-Fenton-like catalyst to degrade anionic dye methyl orange under visible light irradiation. It removed cationic dyes methylene blue in neutral environment and rhodamine B in acidic condition via flocculation. The removal efficiency of methylene blue and rhodamine B by flocculation was more than 95%. Moreover, it could degrade methyl orange and flocculate rhodamine B at the same time. For MO and MO-RhB solutions, the degradation rates of MO in 60 min were 85.5% and 49.1%, respectively. Furthermore, the possible pathways for the production of active species in the MO degradation reaction were discussed. This is the first HPB constructed with 4e-reduced phosphotungstate, Ba and Na ions, having the properties of photo Fenton-like catalyst and flocculant. (C) 2018 Elsevier Ltd. All rights reserved.
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