DocumentCode :
1307331
Title :
Effect of Calcination Temperature on 
Sensing Properties for Quantum Size ZnO Crystals
Author :
Bai, Shouli ; Hu, Jingwei ; Li, Dianqing ; Luo, Ruixian ; Chen, Aifan ; Liu, Chung Chiun
Author_Institution :
State Key Lab. of Chem. Resource Eng., Beijing Univ. of Chem. Technol., Beijing, China
Volume :
12
Issue :
5
fYear :
2012
fDate :
5/1/2012 12:00:00 AM
Firstpage :
1122
Lastpage :
1126
Abstract :
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 NO2 and the selectivity to CO and CH4 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.
Keywords :
II-VI semiconductors; Raman spectra; X-ray diffraction; calcination; gas sensors; nanoparticles; nitrogen compounds; powders; sol-gel processing; transmission electron microscopy; wide band gap semiconductors; zinc compounds; NO2; OA; Raman spectra analysis method; TEM; X-ray diffraction; XRD; ZnO; calcination temperature effect; capping agent; gas sensing; nanocrystals structure; oleic acid; particle size control; powder calcination; quantum size crystal synthesis; sol-gel processing; temperature 290 degC; temperature 293 K to 298 K; temperature 400 degC; time 1 h; transmission electron microscope; Calcination; Crystals; Temperature; Temperature measurement; Temperature sensors; Zinc oxide; ${hbox {NO}}_{2}$ ; ZnO; quantum size; sensing property;
fLanguage :
English
Journal_Title :
Sensors Journal, IEEE
Publisher :
ieee
ISSN :
1530-437X
Type :
jour
DOI :
10.1109/JSEN.2011.2166152
Filename :
5999684
Link To Document :
