Chlorine sensor combining NASICON with CaMg3(SiO3)4-doped CdS electrode
A compact tubular sensor based on NASICON (sodium super ionic conductor) and CaMg3(SiO3)4 (Asbestos, acid washed A.R)-doped CdS sensing electrode was prepared for the detection of chlorine. The sensing properties strongly depended on the sintered temperature of the sensing electrode materials. The sensor using CaMg3(SiO3)4-doped CdS sintered at 600℃ gave excellent sensing properties to 1-10 ppm chlorine in air at 100-250℃. The sensitivity (slope) was 392 mV/decade at 200℃. And it showed a good selectivity to Cl2 against H2S, SO2, NO2, NH3, CH4 and CO. Also it had speedy response kinetics to chlorine, the 90% response or 90% recovery time to 5 ppm chlorine was 20 s or 37 s, respectively. The phase compositions and grain size of NASICON and CaMg3(SiO3)4-doped CdS were examined by means of X-ray diffraction (XRD). On the basis of XPS analysis for Cl2-absorbed sensing electrode, a sensing mechanism involved the mixed potential at the sensing electrode was proposed.
Solid-electrolyte NASICON Chlorine gas sensor CdS Mized potential
Xishuang Liang Fengmin Liu Tiegang Zhong Biao Wang Baofu Quan Geyu Lu
State Key Laboratory on Integrated Optoelectronics JiLin University Region and College of Electronic Science and Engineering, JiLin University, Changchun 130012, PR China
国际会议
The 16th International Conference on Solid State Ionics(第十六届国际固态离子学会议)
上海
英文
1636-1640
2007-07-01（万方平台首次上网日期，不代表论文的发表时间）