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

研究成果: Contribution to journalArticle査読

75 被引用数 (Scopus)

抄録

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.

本文言語英語
ページ(範囲)904-914
ページ数11
ジャーナルSensors and Actuators, B: Chemical
241
DOI
出版ステータス出版済み - 3 31 2017

All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 器械工学
  • 凝縮系物理学
  • 表面、皮膜および薄膜
  • 金属および合金
  • 電子工学および電気工学
  • 材料化学

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