Photocatalytic degradation of methyl orange dye by pristine titanium dioxide, zinc oxide, and graphene oxide nanostructures and their composites under visible light irradiation

Ramesh Raliya, Caroline Avery, Sampa Chakrabarti, Pratim Biswas

Research output: Contribution to journalArticlepeer-review

82 Scopus citations

Abstract

Discharge of azo dyes by textile and allied industries to the environment is a growing problem. Degradation of an azo dye, methyl orange (MO), was tested in simulated wastewater with different oxide nanomaterials acting as photocatalysts under visible light. Titanium dioxide (TiO2), zinc oxide (ZnO), and graphene oxide (GO) were synthesized, characterized, and applied for adsorptive and photocatalytic removal of the dye. Factors such as initial concentration of MO and size of nanoparticle photocatalyst were varied to determine the optimum conditions for dye removal. Finally, nanocomposites of the three materials (GO–TiO2–ZnO) were synthesized and tested for its photocatalytic performance. The composition of the individual oxide in the nanocomposite was then varied to achieve the best photocatalytic performance.

Original languageEnglish (US)
Pages (from-to)253-259
Number of pages7
JournalApplied Nanoscience (Switzerland)
Volume7
Issue number5
DOIs
StatePublished - Jun 1 2017
Externally publishedYes

Keywords

  • Graphene oxide
  • Nanoparticles
  • Photocatalysis
  • TiO
  • ZnO

ASJC Scopus subject areas

  • Biotechnology
  • Atomic and Molecular Physics, and Optics
  • Materials Science (miscellaneous)
  • Physical and Theoretical Chemistry
  • Cell Biology
  • Electrical and Electronic Engineering

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