The exceptional photo-catalytic activity of ZnO/RGO composite via metal and oxygen vacancies

Ting Ting Chen, I. Chun Chang, Min Han Yang, Hsin-Tien Chiu, Chi Young Lee*

*Corresponding author for this work

Research output: Contribution to journalArticle

53 Scopus citations

Abstract

ZnO/reduced graphene oxide (RGO) nanocomposite with many zinc and oxygen vacancies, synthesized in a simple solvothermal reaction exhibits significant photocatalytic activity. Photoluminescence and electron paramagnetic resonance measurements indicate that the zinc vacancies and oxygen vacancies were generated on the ZnO surface, and were crucial to that photocatalytic behavior. The photodegradation of methylene orange was significantly reduced by the addition of h+ and OH scavengers. Both zinc and oxygen vacancies cause effective charge separation in the photodegradation of methylene orange, which markedly inhibits the recombination of charges. The advanced photocatalytic behavior of the ZnO/RGO composite is discussed in detail herein.

Original languageEnglish
Pages (from-to)442-449
Number of pages8
JournalApplied Catalysis B: Environmental
Volume142-143
DOIs
StatePublished - 1 Oct 2013

Keywords

  • Defect
  • Graphene
  • Heterojunction
  • Photocatalysis
  • ZnO

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