Effect of calcination temperature on NO 2 sensing properties for quantum size ZnO crystals

Shouli Bai, Jingwei Hu, Dianqing Li, Ruixian Luo, Aifan Chen, Chung Chiun Liu

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


Quantum size ZnO crystals have been synthesized successfully by a room temperature sol-gel process using oleic acid (OA) as capping agent to control the particle size. The particle size and structure of ZnO nanocrystals have been charactirized by X-ray diffraction (XRD), transmission electron microscope (TEM) and Raman spectra analysis methods. The sensor based on ZnO powder calcined at 400 °C for 1 h exhibits the highest response of 280 to NO 2 and the selectivity to CO and CH 4 at the same concentration reaches 31 and 49 at operating temperature of 290°C. The effect of calcination temperature on the performance of gas sensing has also been studied.

Original languageEnglish
Article number5999684
Pages (from-to)1122-1126
Number of pages5
JournalIEEE Sensors Journal
Issue number5
StatePublished - 2012


  • NO
  • quantum size
  • sensing property
  • ZnO


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