Sonochemical assisted synthesis of RGO/ZnO nanowire arrays for photoelectrochemical water splitting

Ibrahim Khan, Akram A.M. Ibrahim, Manzar Sohail, Ahsanulhaq Qurashi

Research output: Journal PublicationArticlepeer-review

62 Citations (Scopus)

Abstract

This article presented the synthesis of a hybrid nanoarchitecture material composed of reduced graphene oxide (RGO) multiple sheets and ZnO nanowire arrays (NWAs) formed on an arbitrary ZnO coated fluorine doped tin oxide (FTO) substrates via pulse sonication and hydrothermal approach. The NWAs have high aspect-ratio, high density, apt positioning and well-ordered formation. FESEM images demonstrated that RGO layers have been effectively intercalated between and on the accessible surfaces of the ZnO NWAs. The diameter of ZnO nanowires is 80–150 nm and length about 1–2 μm. Raman spectrum of hybrid material exhibited characteristic D and suppressed G peaks for graphene and E2 mode at 437 cm−1 for ZnO NWAs. UV–visible spectrum indicated slight red shift towards visible range after formation of RGO/ZnO NWAs heterostructure. The Photoelectrochemical results indicated higher current densities for RGO/ZnO NWAs heterostructure due to water oxidation reaction at the working electrode compared to pristine ZnO NWAs.

Original languageEnglish
Pages (from-to)669-675
Number of pages7
JournalUltrasonics Sonochemistry
Volume37
DOIs
Publication statusPublished - 1 Jul 2017
Externally publishedYes

Keywords

  • Nanowire arrays (NWAs)
  • Photocurrent
  • RGO/ZnO
  • Sonochemical
  • Water splitting

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Environmental Chemistry
  • Radiology Nuclear Medicine and imaging
  • Acoustics and Ultrasonics
  • Organic Chemistry
  • Inorganic Chemistry

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