Synthesis of In2O3/graphene heterostructure and their hydrogen gas sensing properties

Muhammad Mansha, Ahsanulhaq Qurashi, Nisar Ullah, Fatai Olawale Bakare, Ibrahim Khan, Zain H. Yamani

Research output: Contribution to journalArticlepeer-review

64 Scopus citations

Abstract

Heterostructured materials composed of In2O3 nanocrystals and graphene layers were successfully developed by facile synthesis technique. Such a binary heterostructure with suitable configuration and inimitable morphology exhibits rich and varied properties particularly in nanodevices such as gas sensors. FESEM investigation revealed that In2O3 nanocrystals were well monodispersed and disseminated on the complete surface of the graphene layers. XRD analysis also confirmed the presence of carbon peak in the spectrum due to the existence of graphene layers. Elemental mapping also reassured the homogenous and uniform distribution of In2O3 nanocrystals on the graphene surface. Room temperature photoluminescence was carried out to investigate the optical properties of In2O3/Graphene heterostructure. Hydrogen sensors made of In2O3/Graphene showed improved sensitivity which is attributed to benign surface interaction of In2O3 with graphene which enhanced overall electrical conductivity of heterostructure. This study offers strategies for the design and development of heterostructures with diverse variation of semiconductors configurations through simple technique for improved nanodevices.

Original languageBritish English
Pages (from-to)11490-11495
Number of pages6
JournalCeramics International
Volume42
Issue number9
DOIs
StatePublished - 1 Jul 2016

Keywords

  • FESEM
  • H gas sensor
  • Hydrothermal synthesis
  • InO/Graphene heterostructure
  • PL Spectrum

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