rGO/MnO2 nanowires for ultrasonic-combined Fenton assisted efficient degradation of Reactive Black 5
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Date
2017
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Volume Title
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IWA Publishing 12 Caxton Street London SW1H 0QS
Abstract
Reduced graphene oxide (rGO) coated manganese dioxide (MnO<inf>2</inf>) nanowires (NWs) were prepared by the hydrothermal method. Raman spectra confirmed the presence of rGO and the Brunauer-Emmett-Teller surface area of rGO/MnO<inf>2</inf> NWs was found to be 59.1 m2g-1. The physico-chemical properties of prepared catalysts for the degradation of Reactive Black 5 (RB5) dye were investigated. 84% of RB5 dye in hydrogen peroxide solution was successfully degraded using rGO/MnO<inf>2</inf> NWs, while only 63% was successfully degraded with pristine ?-MnO<inf>2</inf> NWs in 60 min owing to the smaller crystallite size and large surface area. Further, the ultrasonic-combined Fenton process significantly enhanced the degradation rate to 95% of RB5 by the catalyst rGO/MnO<inf>2</inf> NWs due to synergistic effects. The decomposition products identified using gas chromatography-mass spectrometry revealed a higher production rate of fragments in the ultrasonic-combined Fenton process. Therefore, rGO/MnO<inf>2</inf> NWs with the ultrasonic-combined Fenton process is an efficient catalyst for the degradation of RB5, and may be used for environmental protection. © IWA Publishing 2017.
Description
Keywords
Catalysis, Catalysts, Chromatography, Crystallite size, Degradation, Graphene, Manganese oxide, Mass spectrometry, Nanowires, Brunauer-emmett-teller surface areas, Decomposition products, Efficient catalysts, Gas chromatography-mass spectrometry, Hydrothermal methods, MnO2 NWs, Physicochemical property, Reduced graphene oxides (RGO), Gas chromatography, dye, graphene oxide, hydrogen peroxide, manganese dioxide, nanowire, reactive black 5 dye, reduced graphene oxide, unclassified drug, graphite, manganese derivative, naphthalenesulfonic acid derivative, organic compound, oxide, Remazol black B, black carbon, catalysis, catalyst, decomposition, degradation, oxide group, physicochemical property, reactive transport, ultrasonics, adsorption, Article, chemical structure, crystallization, desorption, environmental protection, Fenton reaction, hydrothermal method, mass fragmentography, nanocatalysis, nanocatalyst, nanofabrication, particle size, physical chemistry, Raman spectrometry, reaction time, surface area, suspended particulate matter, ultrasound, water content, chemistry, procedures, sewage, water pollutant, Gas Chromatography-Mass Spectrometry, Graphite, Hydrogen Peroxide, Manganese Compounds, Naphthalenesulfonates, Organic Chemicals, Oxides, Ultrasonics, Waste Disposal, Fluid, Water Pollutants, Chemical
Citation
Water Science and Technology, 2017, 76, 7, pp. 1652-1665