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Journal of Materials Science: Materials in Electronics

, Volume 29, Issue 22, pp 19413–19424 | Cite as

Development of tungsten disulfide ZnO nanohybrid photocatalyst for organic pollutants removal

  • Arulappan Durairaj
  • Daniel Lydia Jennifer
  • Thangavel Sakthivel
  • Asir Obadiah
  • Samuel Vasanthkumar
Article
  • 33 Downloads

Abstract

In this study, ZnO and ZnO/WS2 nanohybrid were synthesized by a facile microwave approach. Nanohybrid phase purity and structural features were examined through XRD, SEM–EDS, and EDS color mapping techniques. The optical absorbance and band gap energy of the ZnO/WS2 nanohybrid was measured by the UV–DRS. Functional group features on the ZnO/WS2 nanohybrid was investigated by the FT-IR spectroscopy. Further, the position of the conduction band and conductivity of the prepared ZnO/WS2 nanohybrid was studied by the Mott–Schottky and Nyquist plot techniques. The photocatalytic properties of the ZnO/WS2 nanohybrid were evaluated through the degradation of anionic and cationic organic pollutants such as methylene blue, bromophenol-B and 4-nitrophenol respectively. The organic pollutants degradation efficiency was determined by the UV absorbance spectroscopy and HPLC. Pseudo first order rate constant of the degradation reaction was calculated by the Langmuir–Hazelwood kinetic model. In addition, probe molecule mineralization was evaluated by TOC analysis. The ZnO/WS2 nanohybrid catalysts durability was analyzed by subjecting it to four repeated photocatalytic cycles. After the photocatalysis reaction the catalyst structure distortion was analyzed by the XRD technique.

Notes

Acknowledgements

The authors are grateful to the Management and the Authorities of Karunya Institute of technology and science, Coimbatore, for their valuable support and constant encouragement. The authors are grateful to the Department of Science and Technology, Govt of India for their financial support.

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© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Departmentof ChemistryKarunya Institute of Technology and SciencesCoimbatoreIndia
  2. 2.Key Lab of Advanced Transducers and Intelligent Control System, Ministry of Education and Shanxi Province, College of Physics and OptoelectronicsTaiyuan University of TechnologyTaiyuanPeople’s Republic of China

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