Defect engineered visible light active ZnO nanorods for photocatalytic treatment of water

Tanujjal Bora, Priyanka Sathe, Karthik Laxman, Sergey Dobretsov, Joydeep Dutta

Research output: Contribution to journalArticle

45 Citations (Scopus)

Abstract

Photocatalytic degradation of organic wastes and microbes in water using solar light is a green technology that requires the design of visible light active photocatalysts. Here we report the fabrication of visible light active zinc oxide nanorods (ZnO NRs), wherein the visible light absorption is enhanced by modulating the surface defects on the NRs. Oxygen vacancies in the NRs as characterized by photoluminescence and X-ray photoelectron spectroscopy are controlled by annealing at different temperatures in the ambient. The role of surface defects on the visible light photocatalytic degradation of an organic dye, industrial waste, bacterial culture and inland brackish water is studied. Results presented here provide a simple strategy to make the wide bandgap ZnO NRs visible light active, enabling their use for the photocatalytic decontamination of water.

Original languageEnglish
Pages (from-to)11-18
Number of pages8
JournalCatalysis Today
Volume284
DOIs
Publication statusPublished - Apr 15 2017

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Keywords

  • Annealing
  • Oxygen vacancy
  • Photocatalysis
  • Surface defect
  • Water purification
  • Zinc oxide

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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