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Open Access NiO–CeO2 nano-catalysts: Synthesis, characterization and application in catalytic wet air oxidation of wastewater

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The NiO–CeO2 nano-catalysts, prepared by co-precipitation were investigated in catalytic wet air oxidation of paper industry wastewater. The structural, micro-structural and textural properties of catalysts were studied by XRD, FT-IR, N2-sorption, TGA, FE-SEM, TEM and EDS techniques. The prepared NiO–CeO2 nano-catalysts exhibited good activity at mild operating conditions of 90 °C and 1 atm. The catalytic activity was found to be increased with increasing Ni content, and the maximum removal efficiency (COD, 62%; color, 75%) was obtained with Ce40Ni60 nano-catalyst. The increased biodegradability from 0.27 to 0.42 proved the feasibility of CWAO in degradation of non-biodegradable compounds. The overall reactions during CWAO were found to follow the first order kinetics in terms of COD and color removal.

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Keywords: CATALYSIS; NANO-MATERIALS; NIO–CEO2; WASTEWATER; WET AIR OXIDATION

Document Type: Research Article

Publication date: October 1, 2015

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  • Materials Express is a peer-reviewed multidisciplinary journal reporting emerging researches on materials science, engineering, technology and biology. Cutting-edge researches on the synthesis, characterization, properties, and applications of a very wide range of materials are covered for broad readership; from physical sciences to life sciences. In particular, the journal aims to report advanced materials with interesting electronic, magnetic, optical, mechanical and catalytic properties for industrial applications.
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