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Open AccessArticle
Efficient Removal of Methylene Blue Using an Organic–Inorganic Hybrid Polyoxometalate as a Dual-Action Catalyst for Oxidation and Reduction
by
Lu Chen
Lu Chen 1,†,
Haowen Cui
Haowen Cui 1,†,
Feng Jiang
Feng Jiang 1,
Lingyan Kong
Lingyan Kong 2,
Baoli Fei
Baoli Fei 1,3,* and
Xiang Mei
Xiang Mei 4,*
1
College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China
2
College of Food Science and Engineering, Nanjing University of Finance and Economics, Nanjing 210023, China
3
State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Guangxi Normal University, Guilin 541004, China
4
College of Ecology and Environment, Nanjing Forestry University, Nanjing 210037, China
*
Authors to whom correspondence should be addressed.
†
These authors contributed equally to this work.
Catalysts 2024, 14(9), 576; https://doi.org/10.3390/catal14090576 (registering DOI)
Submission received: 1 August 2024
/
Revised: 20 August 2024
/
Accepted: 28 August 2024
/
Published: 29 August 2024
Abstract
An organic–inorganic hybrid polyoxometalate (POM) CoPMoV [PMoVI8VIV4VV2O42][Co(Phen)2(H2O)]2[TEA]2•H3O•3H2O (Phen = 1,10-phenanthroline, TEA = triethylamine) prepared by hydrothermal synthesis was explored as a heterogeneous catalysts to remove methylene blue (MB) through Fenton-like reaction and catalytic reduction. X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX), Fourier transform infrared spectroscopy (FT-IR), and X-ray photoelectron spectroscopy (XPS) were employed to characterize CoPMoV. The MB removal rates for the Fenton-like reaction and the catalytic reduction were 91.6% (120 min) and 97.5% (2 min), respectively, under optimum conditions. CoPMoV demonstrated excellent stability and recyclability in the Fenton-like reaction and catalytic reduction, which was confirmed by 5 cycle tests. Plausible mechanisms for MB degradation and reduction have also been proposed. Benefiting from the excellent redox properties of cobalt and [PMoVI8VIV4VV2O42]5− anion, CoPMoV could act as a Fenton-like and reductive catalyst for the removal of MB. This study provides a green and facile strategy to design POM-based organic–inorganic material for dye wastewater treatment via oxidation and reduction.
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MDPI and ACS Style
Chen, L.; Cui, H.; Jiang, F.; Kong, L.; Fei, B.; Mei, X.
Efficient Removal of Methylene Blue Using an Organic–Inorganic Hybrid Polyoxometalate as a Dual-Action Catalyst for Oxidation and Reduction. Catalysts 2024, 14, 576.
https://doi.org/10.3390/catal14090576
AMA Style
Chen L, Cui H, Jiang F, Kong L, Fei B, Mei X.
Efficient Removal of Methylene Blue Using an Organic–Inorganic Hybrid Polyoxometalate as a Dual-Action Catalyst for Oxidation and Reduction. Catalysts. 2024; 14(9):576.
https://doi.org/10.3390/catal14090576
Chicago/Turabian Style
Chen, Lu, Haowen Cui, Feng Jiang, Lingyan Kong, Baoli Fei, and Xiang Mei.
2024. "Efficient Removal of Methylene Blue Using an Organic–Inorganic Hybrid Polyoxometalate as a Dual-Action Catalyst for Oxidation and Reduction" Catalysts 14, no. 9: 576.
https://doi.org/10.3390/catal14090576
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