Preparation, Characterization and Visible light Photocatalytic Activity of Rare earth doped Zinc Oxide Nanoparticles

Authors

  • M. Prathap Kumar  Chemical Engineering area, CSIR-Central Leather Research Institute, Adyar, Chennai, Tamil Nadu, India and Department of Chemistry, MVJ College of Engineering, Bangalore, Karnataka, India
  • G. A. Suganya Josephine  AVIT, Vinayaka Mission's Research Foundation, (Deemed to be University) Paiyanoor, Tamil Nadu, India
  • A. Sivasamy  Chemical Engineering area, CSIR-Central Leather Research Institute, Adyar, Chennai, Tamil Nadu, India

Keywords:

Rare Earth Doped, Nanoparticles, MG, Visible Light

Abstract

The present study focused on synthesis, characterization and photocatalytic activity of Rare earth doped ZnO nanoparticles for the degradation of Malachite green dye from aqueous phase under visible light irradiation. The concentration of dopant was varied from 3 - 10 wt% and thoroughly characterized by XRD, FT-IR, UV-Vis-DRS, FE-SEM, EDAX and EPR techniques. The band gap energy of (DZ (1:9)) was found to be 3.07 eV, as determined from UV-Vis-DRS analysis. Particle size of the material was in the nano regime (38 to 47 nm) with a hexagonal morphology which is confirmed from FE-SEM analysis. In-situ generation of OH? radicals by light irradiation was confirmed from EPR analysis. The synthesized rare earth doped photocatalyst was investigated under Visible light irradiation for the photocatalytic degradation of non azo dye (MG). At neutral pH (7.10) the photocatalyst displayed 92% degradation of MG dye under both Visible light irradiations. As the substrate concentration increased from 5 ppm to 25 ppm the rate constant showed a decreased trend. The R2 values clearly indicated that the reaction follows a pseudo-first order kinetics and found to possess enhanced photocatalytic activities under Visible light irradiation. The efficiency and cost effectiveness of DZ (1:9) nanomaterial was determined from reusability studies for the photocatalytic degradation of MG dye and it exhibited better photocatalytic activity even after three cycles of reuse under Visible light irradiation.

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International Journal of Scientific Research in Science and Technology

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Published

2021-01-20

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Volume 8, Issue 2, January-February-2021

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Research Articles

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[1]
M. Prathap Kumar, G. A. Suganya Josephine, A. Sivasamy "Preparation, Characterization and Visible light Photocatalytic Activity of Rare earth doped Zinc Oxide Nanoparticles" International Journal of Scientific Research in Science and Technology(IJSRST), Online ISSN : 2395-602X, Print ISSN : 2395-6011,Volume 8, Issue 2, pp.36-46, January-February-2021.