Visible light degradation of textile effluent using nanostructured TiO2/Ag/CuO photocatalysts
https://doi.org/10.17586/2220-8054-2016-7-4-695-698
Abstract
TiO2, Ag and CuO nanomaterials, and nanostructured TiO2/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 TiO2/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 TiO2/Ag/CuO photocatalyst with the composition of 80:10:10 weight percentage exhibited remarkable per- formance. Coupling of Ag metal nanoparticles and narrow bandgap CuO semiconductor nanomaterial to the wide bandgap TiO2 semiconductor nanomaterial was found to modify the operative bandgap of the system and generate electron-hole pairs under visible light irradiation. The coupled TiO2/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 TiO2/Ag/CuO,
nanostructured photocatalysts,
bandgap,
degradation of textile effluents,
advanced oxidation process
Supporting agencies: One of the authors, NK, thanks HETC project for the financial support. The authors are thankful to SAIF at IIT Chennai for the HR-TEM and UV-Vis DRS characterization of powder samples. References
About the Authors
N. Karthikeyan
University of Madras;
The Open University of Sri Lanka
India
India
Department of Nuclear Physics, University of Madras; Department of Physics, The Open University of Sri Lanka
Guindy Campus, Chennai, India;
Nawala, Nugegoda, Sri Lanka
V. Narayanan
University of Madras
India
India
Guindy Campus, Chennai
A. Stephen
University of Madras
India
India
Department of Nuclear Physics
Guindy Campus, Chennai
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Review
For citations:
Karthikeyan N., Narayanan V., Stephen A. Visible light degradation of textile effluent using nanostructured TiO2/Ag/CuO photocatalysts. Nanosystems: Physics, Chemistry, Mathematics. 2016;7(4):695-698. https://doi.org/10.17586/2220-8054-2016-7-4-695-698
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