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

51 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

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Acetone
Oxides
Graphene
acetone
graphene
Gases
Vapors
vapors
oxides
gases
composite materials
Composite materials
Chemical sensors
Charge carriers
Carrier concentration
Heterojunctions
heterojunctions
charge carriers
chemical composition

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

Cite this

Enhanced gas sensing properties to acetone vapor achieved by α-Fe2O3 particles ameliorated with reduced graphene oxide sheets. / Zhang, Bo; Liu, Jie; Cui, Xiaobiao; Wang, Yinglin; Gao, Yuan; Sun, Peng; Liu, Fengmin; Shimanoe, Kengo; Yamazoe, Noboru; Lu, Geyu.

In: Sensors and Actuators, B: Chemical, Vol. 241, 31.03.2017, p. 904-914.

Research output: Contribution to journalArticle

Zhang, Bo ; Liu, Jie ; Cui, Xiaobiao ; Wang, Yinglin ; Gao, Yuan ; Sun, Peng ; Liu, Fengmin ; Shimanoe, Kengo ; Yamazoe, Noboru ; Lu, Geyu. / Enhanced gas sensing properties to acetone vapor achieved by α-Fe2O3 particles ameliorated with reduced graphene oxide sheets. In: Sensors and Actuators, B: Chemical. 2017 ; Vol. 241. pp. 904-914.
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AU - Gao, Yuan

AU - Sun, Peng

AU - Liu, Fengmin

AU - Shimanoe, Kengo

AU - Yamazoe, Noboru

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