Acta Chimica Sinica ›› 2011, Vol. 69 ›› Issue (24): 2964-2968.DOI: 10.6023/A1107071 Previous Articles     Next Articles

Full Papers

基于CoFe2O4表面催化发光的硫化铵气体传感器研究

何树华   

  1. (长江师范学院化学化工学院 涪陵 408100)
  • 投稿日期:2011-07-07 修回日期:2011-08-30 发布日期:2011-09-19
  • 通讯作者: 何树华 E-mail:thshuhua@yahoo.cn

Ammonium Sulfide Gas Sensor Based on Cataluminescence Emission on the Surface of CoFe2O4

HE Shu-Hua   

  1. (School of Chemistry and Chemical Engineering, Yangtze Normal University, Fuling 408100)
  • Received:2011-07-07 Revised:2011-08-30 Published:2011-09-19

On the basis of cataluminescence (CTL) emission on the surface of CoFe2O4 nanomaterial, a novel and sensitive sensor for the determination of ammonium sulfide was developed. The CTL characteristics and the optimal conditions including three nanomaterials morphology, air flow rate, working temperature and wavelength were investigated. Under the optimized conditions, the linear range of CTL intensity versus concentration of ammonium sulfide was 0.13~13 mg/L (r=0.9951, n=9) with a detection limit of 0.04 mg/L (3σ). The relative standard deviation (RSD) for 1.3 mg/L ammonium sulfide was 1.8% (n=8). Interference experiments showed that there was no response from common foreign substances, and the present sensor can be used for the continuous determination of 1.3 mg/L ammonium sulfide more than 60 h over two weeks with a RSD of less than 5%. Meanwhile, this sensor was successfully applied to determine ammonium sulfide in artificial samples with recoveries from 94.7% to 103.9%.

Key words: cobalt iron oxide, cataluminescence, ammonium sulfide, gas sensor