Publication: Formation of copper hydroxy double salts derived from metal oxides and their catalytic activity in degradation of methyl orange
Issued Date
2019-01-01
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ISSN
02728842
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2-s2.0-85054541766
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Mahidol University
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SCOPUS
Bibliographic Citation
Ceramics International. Vol.45, No.1 (2019), 993-1000
Suggested Citation
Vararut Weeramonkhonlert, Assadawoot Srikhaow, Siwaporn Meejoo Smith Formation of copper hydroxy double salts derived from metal oxides and their catalytic activity in degradation of methyl orange. Ceramics International. Vol.45, No.1 (2019), 993-1000. doi:10.1016/j.ceramint.2018.09.278 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/50532
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Title
Formation of copper hydroxy double salts derived from metal oxides and their catalytic activity in degradation of methyl orange
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Abstract
© 2018 Elsevier Ltd and Techna Group S.r.l. This work reports the preparation and application of copper hydroxy double salts (Cu-M HDS) as catalysts for degradation of a model wastewater dye pollutant, methyl orange (MO), under ambient conditions. The Cu-M HDS (M = Ca, Zn, La and Pb) were derived in 30 min from hydrothermal treatment of aqueous copper (II) nitrate and the corresponding metal oxide. All Cu-M HDS systems were highly active for catalytic wet oxidation (CWO) of MO, with complete oxidation of 500 ppm MO possible in less than 10 min under ambient (pH 7.0, 30 °C) conditions, with no requirement for additional oxidants. Dissolved oxygen is crucial for activity, as indicated by poor conversions under anaerobic conditions. Decolorization follows first-order kinetics, with catalyst systems having high surface area and Cu content (Cu-Ca HDS, Cu-La HDS) being most rapid. These features, coupled with favorable reusability profiles and ease of fabrication and use, highlight the potential of Cu-M HDS systems in water remediation strategies.