Enhanced gas sensing properties to acetone vapor achieved by α-Fe2O3 particles ameliorated with reduced graphene oxide sheets

Bo Zhang, Jie Liu, Xiaobiao Cui, Yinglin Wang, Yuan Gao, Peng Sun, Fengmin Liu, Kengo Shimanoe, Noboru Yamazoe, Geyu Lu

Research output: Contribution to journalArticle

65 Citations (Scopus)

Abstract

A low-cost and environmentally friendly hydrothermal method was utilized to prepare reduced graphene oxide (rGO) and synthesize rGO/α-Fe2O3 composites with different rGO contents. The chemical composition and morphological essence of the as-prepared samples were characterized through multiple techniques. The results indicated that the uniform α-Fe2O3 cubes adhered uniformly on both sides of the crumpled and rippled rGO sheets. In addition, a series of resistive-type gas sensors were fabricated based on the as-prepared rGO/α-Fe2O3 composites as well as pure α-Fe2O3 to compare their gas-sensing properties toward acetone vapor. The composite containing 1.0 wt% rGO exhibited an enhanced gas response and its response time was shortened to 2 s. We attribute it to the extension of electron depletion layers, the change of charge carrier concentration, which are caused by the formation of local p-n heterojunctions when introducing rGO.

Original languageEnglish
Pages (from-to)904-914
Number of pages11
JournalSensors and Actuators, B: Chemical
Volume241
DOIs
Publication statusPublished - Mar 31 2017

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

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