基于稀土材料催化化学发光法检测乙腈气体传感器的研究

Study on Gaseous Acetonitrile Sensor Based on Cataluminescence of Rare Earth Metarial

基于稀土粉体材料Y2O3催化乙腈气体在其表面发生氧化反应而产生化学发光现象，研制了一种基于化学发光原理检测乙腈的气体传感器。研究结果表明，该传感器具有较高灵敏度和较强的选择性。在温度175℃，波长490nm条件下，其催化化学发光强度与乙腈浓度在一定范围内呈良好的线性关系，线性范围为2．9～290．0mg／m^3（r=0．9955）；检出限为1mg／m^3。该传感器操作简便、性能稳定，实现了对乙腈气体的实时在线检测。

When it passed the surface of rare earth material Y2O3, acetonitrile gas was catalytically oxidized and thus yield chemiluminessence. Based on this phenomenon, a novel cataluminescence（CTL） acetonitrile gas sensor was developed in this paper. The results showed that this method had high sensitivity and good selectivity. Quantitative analysis was performed at 175℃ with detection wavelength of 490 nm. Good linearity was obtained in the range from 2.9 to 290.0 mg/m^3（r=0.9955, n=8）, with the detection limit of 1 mg/m^3. This gas sensor is a simple and stable one which has been applied to the reahime and online determination of acetonitrile successfully.