Petrović, Milica M., Slipper, Ian J., Antonijević, Milan D. ORCID: 0000-0002-5847-7886, Nikolić, Goran S., Mitrović, Jelena Z., Bojić, Danijela V. and Bojić, Aleksandar Lj. (2015) Characterization of a Bi2O3 coat based anode prepared by galvanostatic electrodeposition and its use for the electrochemical degradation of Reactive Orange 4. Journal of the Taiwan Institute of Chemical Engineers, 50. pp. 282-287. ISSN 1876-1070 (doi:https://doi.org/10.1016/j.jtice.2014.12.010)

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Abstract

Two anodes were prepared by galvanostatic electrodeposition from an acidic Bi(III) solution on a Ti substrate and calcination in air at 350 °C and 600 °C. The surface coat of the anode calcined at 350 °C displayed irregular, predominantly sheet-like and needle-like morphology and it was composed of α-Bi2O3, with minor amounts of rhombohedral Bi and β-Bi2O3, and traces of ω-Bi2O3. The surface coat of the anode calcined at 600 °C predominantly displayed an oval morphology, and it was composed solely of α-Bi2O3. Only this anode was electrochemically stable. TG analysis showed that it was chemically stable in the investigated temperature range from 25 °C to 600 °C, both in oxygen and nitrogen. This anode was used for electrochemical decolorization of a dye, Reactive Orange 4, in the presence of H2O2. The optimal values for the decolorization parameters (applied current density, H2O2 and Na2SO4 concentration and pH), which provided the fastest decolorization, were determined. Decolorization reactions follow pseudo-first order kinetics.

Item Type:	Article
Additional Information:	[1] Acknowledgement (funding): Ministry of Education, Science and Technological Development of the Republic of Serbia supported this work (Grant No. ТR 34008).
Uncontrolled Keywords:	anode, electrodeposition, bismuth oxide, dye, decolorization
Subjects:	Q Science > QD Chemistry
Faculty / School / Research Centre / Research Group:	Faculty of Engineering & Science Faculty of Engineering & Science > School of Science (SCI)
Last Modified:	20 Oct 2016 13:48
URI:	http://gala.gre.ac.uk/id/eprint/12845

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