Enhanced photocatalytic performance of graphene-ZnO nanoplatelet composite thin films prepared by electrostatic spray deposition

Bhavana N. Joshi, Hyun Yoon, Seung Heon Na, Jae Young Choi, Sam S. Yoon

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

Graphene-ZnO (G-ZnO) composite thin films were produced using the electrostatic spray deposition technique (ESD). The effects of the concentration of graphene and annealing temperature on the structural and photocatalytic properties of the G-ZnO films were studied by X-ray diffraction, scanning electron microscopy, atomic force microscopy, Raman spectroscopy, and UV-visible spectroscopy. We demonstrated that the G-ZnO films exhibit enhanced activities towards the photodegradation of methylene blue dye. A G-ZnO film with 0.1 wt% graphene that was annealed at 300 C showed the highest photo-degradation activity. We found that the incorporation of graphene reduced electron-hole recombination in the ZnO film.

Original languageEnglish
Pages (from-to)3647-3654
Number of pages8
JournalCeramics International
Volume40
Issue number2
DOIs
Publication statusPublished - 2014 Mar

Keywords

  • D. ZnO
  • Graphene-ZnO
  • Methylene Blue
  • Photocatalyst

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

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