Flower-like ZnO hollow microspheres loaded with CdO nanoparticles as high performance sensing material for gas sensors

Tianshuang Wang, Xueying Kou, Liupeng Zhao, Peng Sun, Chang Liu, Yue Wang, Kengo Shimanoe, Noboru Yamazoe, Geyu Lu

研究成果: Contribution to journalArticle査読

60 被引用数 (Scopus)

抄録

CdO decorated flower-like ZnO hollow microspheres were successfully prepared via a two-step hydrothermal strategy. CdO nanoparticles (∼12 nm) equably loaded on the surfaces of ZnO nanosheets, which could be clearly observed from SEM and TEM images. The results of X-ray photoelectron spectroscopy and H2 temperature-programmed reduction (H2-TPR) indicated that the amount of chemisorbed oxygen was increased after the introduction of CdO nanoparticles. Compared with the flower-like ZnO hollow microspheres, the 2.6 mol% CdO:ZnO heterostructure composites exhibited highest response (65.5) to 100 ppm ethanol at 250 °C, which was about 16 folder higher than that of pure ZnO at the same operating temperature of 250 °C. Significantly, the detection limit of the 2.6 mol% CdO:ZnO heterostructure could reach ppb level (500 ppb). The mechanism of the enhanced ethanol sensing was also discussed systematically.

本文言語英語
ページ(範囲)692-702
ページ数11
ジャーナルSensors and Actuators, B: Chemical
250
DOI
出版ステータス出版済み - 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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