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Show simple item record Debnath, S Ballav, N Nyoni, H Maity, Arjun Pillay, K 2014-11-18T10:08:26Z 2014-11-18T10:08:26Z 2015-02
dc.identifier.citation Debnath, S, Ballav, N, Nyoni, H, Maity, A and Pillay, K. 2015.Optimization and mechanism elucidation of the catalyticphoto-degradation of the dyes Eosin Yellow (EY) and Naphthol blueblack (NBB) by a polyaniline-coated titanium dioxide nanocomposite. Applied Catalysis B: Environmental, vol.163, pp 330-342. en_US
dc.identifier.issn 0926-3373
dc.description Copyright:2015 Elsevier. This is a Post-print version of the work. The definitive version is published in Applied Catalysis B: Environmental, vol.163, pp 330-342 en_US
dc.description.abstract A polyaniline-coated titanium oxide nanocomposite (PTO) was synthesized, characterized and used in the catalytic photo-degradation of the anionic dyes Eosin Yellow (EY) and Naphthol blue black (NBB). An emphasis was placed on the key parameters governing the degradation process. It was noted that the extent of degradation was higher at lower pH for both dyes. The rate of degradation of both dyes also increased with increasing catalyst dosage, Langmuir–Hinselwood models and other second-order kinetic models verified that heterogeneous photocatalysis occurred. The rate of degradation increased with increasing initial dye concentrations and only increased gradually with an increase in UV light intensity in the absence of the catalyst. The optimum operating conditions for the degradation was also predicted using response surface methodology (RSM) analysis as a statistical tool. This analysis revealed that the initial dye concentration, pH and dosage of the catalyst are all significant parameters in the degradation process. The combined effect of pH and initial concentration was antagonistic whilst the combined effect of initial concentration and catalyst dosage and the combined effect of catalyst dosage and pH were both synergistic. The optimum degradation percentages were found to be 99.85 and 99.74 for EY and NBB respectively. These optimum percentage degradations were observed at pH 3.0, initial dye concentration 15 mg L−1 and a catalyst dosage of 1.0 g L−1. LC–MS data was also used to identify the photodegradation products and to propose a mechanism of photodegradation. en_US
dc.language.iso en en_US
dc.publisher Elsevier en_US
dc.relation.ispartofseries Workflow;13745
dc.subject Photocatalytic degradation en_US
dc.subject Eosin yellow en_US
dc.subject Naphthol blue black en_US
dc.subject Polyaniline coated titanium oxide en_US
dc.subject Nanocomposites en_US
dc.subject Response surface en_US
dc.title Optimization and mechanism elucidation of the catalyticphoto-degradation of the dyes Eosin Yellow (EY) and Naphthol blueblack (NBB) by a polyaniline-coated titanium dioxide nanocomposite en_US
dc.type Article en_US

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