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Visible light degradation of textile effluent using nanostructured TiO$_2$ photocatalysts
Navaratnasamy Karthikeyana, Vengidusamy Narayananb, Arumainathan Stephenc a Department of Nuclear Physics, University of Madras, Guindy Campus, Chennai, India
b Department of Physics, The Open University of Sri Lanka, Nawala, Nugegoda, Sri Lanka
c Department of Inorganic Chemistry, University of Madras
Abstract:
TiO$_2$, Ag and CuO nanomaterials, and nanostructured TiO$_2$/Ag/CuO photocatalytic materials coupled in different weight percentages were synthesized. The prepared materials were characterized by XRD, SEM, EDX and UV-Vis diffuse reflectance spectroscopy. Photocatalytic degrading capabilities of the pure, as well as the nanostructured TiO$_2$/Ag/CuO photocatalytic materials were tested on the dye effluent collected from the textile industries. The samples collected during the photocatalytic degradation of textile dye effluent were studied with UV-Vis spectroscopy. The nanostructured TiO$_2$Ag/CuO photocatalyst with the composition of 80:10:10 weight percentage exhibited remarkable performance. Coupling of Ag metal nanoparticles and narrow bandgap CuO semiconductor nanomaterial to the wide bandgap TiO$_2$ semiconductor nanomaterial was found to modify the operative bandgap of the system and generate electron-hole pairs under visible light irradiation. The coupled TiO$_2$/Ag/CuO system facilitates improved electron transfer to the adsorbed molecules, and thus the system improves the photocatalytic degradation of dyes by enhanced redox mechanism.
Keywords:
Coupled TiO$_2$/Ag/CuO, Nanostructured photocatalysts, bandgap, degradation of textile effluents, advanced oxidation process.
Received: 05.02.2016 Revised: 18.04.2016
Citation:
Navaratnasamy Karthikeyan, Vengidusamy Narayanan, Arumainathan Stephen, “Visible light degradation of textile effluent using nanostructured TiO$_2$ photocatalysts”, Nanosystems: Physics, Chemistry, Mathematics, 7:4 (2016), 695–698
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https://www.mathnet.ru/eng/nano268 https://www.mathnet.ru/eng/nano/v7/i4/p695
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Abstract page: | 31 | Full-text PDF : | 14 |
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