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Citation: NIU Xin-Shu, DU Wei-Ping, DU Wei-Min, JIANG Kai. Preparation of Nano-ZnO and Its Gas Sensitivity[J]. Chinese Journal of Applied Chemistry, ;2003, 20(10): 968-971. shu

Preparation of Nano-ZnO and Its Gas Sensitivity

1.
College of Chemistry & Environmental Science, Henan Normol University, Key laboratory of Environmental Science and Engineering, Education Commission of He'nan, Xinxiang 453002

Corresponding author: NIU Xin-Shu,
Received Date: 24 January 2003
Available Online: 9 June 2003
Fund Project: 河南省杰出青年科学基金(0012) (0012)河南省教育厅自然科学基金(20021500007)资助项目 (20021500007)

The ZnO powders were prepared separately by decomposition of zinc chelate, W/O micromulsion method and sol-gel method and characterized by XRD and TEM. All the ZnO obtained by mentioned methods has hexagonal wurzite structure. The ZnO prepared by micromulsion method was sized in 20 nm, smaller than that obtained by the two other method, but had better dispersity. The ZnO made by micromulsion method had a sensitivity of 512 to Cl₂ at the optimum working temperature 335℃. The response time of ZnO made by micromulsion method was 5 s, and the restoration time was several minutes.
- ZnO,
- gas-sensing property,
- chelate compound,
- micromulsion,
- sol-gel,
- nanosized particle
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