najoNanosystems: Physics, Chemistry, MathematicsНаносистемы: физика, химия, математика2220-80542305-7971Университет ИТМО10.17586/2220-8054-2016-7-4-695-698najo-1338Research ArticleСтатьиVisible light degradation of textile effluent using nanostructured TiO2/Ag/CuO photocatalystsVisible light degradation of textile effluent using nanostructured TiO2/Ag/CuO photocatalystsKarthikeyanNKarthikeyanN.

Department of Nuclear Physics, University of Madras; Department of Physics, The Open University of Sri Lanka

Guindy Campus, Chennai, India;Nawala, Nugegoda, Sri Lanka 

Department of Nuclear Physics, University of Madras; Department of Physics, The Open University of Sri Lanka

Guindy Campus, Chennai, India; Nawala, Nugegoda, Sri Lanka 

karthikppt@gmail.comNarayananV.NarayananV.

Guindy Campus, Chennai

 

Guindy Campus, Chennai

vnnara@yahoo.co.inStephenA.StephenA.

Department of Nuclear Physics

Guindy  Campus, Chennai

Department of Nuclear Physics

Guindy  Campus, Chennai

stephenarum@hotmail.comUniversity of Madras; The Open University of Sri LankaИндияUniversity of Madras; The Open University of Sri LankaIndiaUniversity of MadrasИндияUniversity of MadrasIndia20162208202574695698Copyright © Karthikeyan N., Narayanan V., Stephen A., 20252025Karthikeyan N., Narayanan V., Stephen A.Karthikeyan N., Narayanan V., Stephen A.This work is licensed under a Creative Commons Attribution 4.0 License.https://nanojournal.ifmo.ru/jour/article/view/1338

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.

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.

coupled TiO2/Ag/CuOnanostructured photocatalystsbandgapdegradation of textile effluentsadvanced oxidation processcoupled TiO2/Ag/CuOnanostructured photocatalystsbandgapdegradation of textile effluentsadvanced oxidation processOne 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. ReferencesOne 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. ReferencesReferencesFujishima A., Honda K. Electrochemical Photolysis of Water at a Semiconductor Electrode. Nature, 1972, 238 (5358), P. 37–38.Fujishima A., Honda K. Electrochemical Photolysis of Water at a Semiconductor Electrode. Nature, 1972, 238 (5358), P. 37–38.Hisaindee S., Meetani M.A., Rauf M.A. Application of LC-MS to the analysis of advanced oxidation process (AOP) degradation of dye products and reaction mechanisms. TrAC Trends in Analytical Chemistry, 2013, 49, P. 31–44.Hisaindee S., Meetani M.A., Rauf M.A. Application of LC-MS to the analysis of advanced oxidation process (AOP) degradation of dye products and reaction mechanisms. TrAC Trends in Analytical Chemistry, 2013, 49, P. 31–44.Chequer F.M.D., et al. Analyses of the genotoxic and mutagenic potential of the products formed after the biotransformation of the azo dye Disperse Red 1. Toxicology in Vitro, 2011, 25 (8), P. 2054–2063.Chequer F.M.D., et al. Analyses of the genotoxic and mutagenic potential of the products formed after the biotransformation of the azo dye Disperse Red 1. Toxicology in Vitro, 2011, 25 (8), P. 2054–2063.Parsons S.A., Williams M. Advanced Oxidation Processes for Water and Wastewater. London, UK: IWA Publishing, 2004, 368 p.Parsons S.A., Williams M. Advanced Oxidation Processes for Water and Wastewater. London, UK: IWA Publishing, 2004, 368 p.Jakob M., Levanon H., Kamat P.V. Charge Distribution between UV-Irradiated TiO2 and Gold Nanoparticles:? Determination of Shift in the Fermi Level. Nano Letters, 2003, 3 (3), P. 353–358.Jakob M., Levanon H., Kamat P.V. Charge Distribution between UV-Irradiated TiO2 and Gold Nanoparticles:? Determination of Shift in the Fermi Level. Nano Letters, 2003, 3 (3), P. 353–358.Wood A., Giersig M., Mulvaney P. Fermi Level Equilibration in Quantum Dot?Metal Nanojunctions. The Journal of Physical Chemistry B, 2001, 105 (37), P. 8810–8815.Wood A., Giersig M., Mulvaney P. Fermi Level Equilibration in Quantum Dot?Metal Nanojunctions. The Journal of Physical Chemistry B, 2001, 105 (37), P. 8810–8815.Anh Tuan V., et al. Synthesis and characterization of TiO2 photocatalyst doped by transition metal ions (Fe3+, Cr3+ and V5+). Advances in Natural Sciences: Nanoscience and Nanotechnology, 2010, 1 (1), P. 015009 (4 p).Anh Tuan V., et al. Synthesis and characterization of TiO2 photocatalyst doped by transition metal ions (Fe3+, Cr3+ and V5+). Advances in Natural Sciences: Nanoscience and Nanotechnology, 2010, 1 (1), P. 015009 (4 p).Rehman S., et al. Strategies of making TiO2 and ZnO visible light active. Journal of Hazardous Materials, 2009, 170 (2–3), P. 560–569.Rehman S., et al. Strategies of making TiO2 and ZnO visible light active. Journal of Hazardous Materials, 2009, 170 (2–3), P. 560–569.Qiu R., et al. Photocatalytic activity of polymer-modified ZnO under visible light irradiation. J. Hazardous Mat., 2008, 156 (1–3), P. 80–85.Qiu R., et al. Photocatalytic activity of polymer-modified ZnO under visible light irradiation. J. Hazardous Mat., 2008, 156 (1–3), P. 80–85.Saravanan R., et al. Photocatalytic Degradation of Organic Dyes Using ZnO/CeO2 Nanocomposite Material Under Visible Light. Advanced Materials Research, 2012, 584 (1), P. 381–385.Saravanan R., et al. Photocatalytic Degradation of Organic Dyes Using ZnO/CeO2 Nanocomposite Material Under Visible Light. Advanced Materials Research, 2012, 584 (1), P. 381–385.Karthikeyan N., Narayanan V., Stephen A. Effect of Annealing on Photocatalytic Degradation of Azo Dye by TiO2/CuO Binary Nanos- tructured Materials. 4th Int. Symp. for Research Scholars on Metallurgy, Materials Science and Engineering. ISRS, 2012.Karthikeyan N., Narayanan V., Stephen A. Effect of Annealing on Photocatalytic Degradation of Azo Dye by TiO2/CuO Binary Nanos- tructured Materials. 4th Int. Symp. for Research Scholars on Metallurgy, Materials Science and Engineering. ISRS, 2012.Karthikeyan N., Narayanan V., Stephen A. Synthesis and Characterization of Coupled ZnO/Ag/CuO Nanomaterials for Photocatalytic Degradation of Organic Dye under UV irradiation. Int. J. Inn. Res. Sci. & Eng., 2014, 2 (spl), P. 74–79.Karthikeyan N., Narayanan V., Stephen A. Synthesis and Characterization of Coupled ZnO/Ag/CuO Nanomaterials for Photocatalytic Degradation of Organic Dye under UV irradiation. Int. J. Inn. Res. Sci. & Eng., 2014, 2 (spl), P. 74–79.

The authors declare that there are no conflicts of interest present.