纳米MgO催化发光检测硫化氢

摘要

研究了硫化氢在纳米MgO表面的催化发光现象,发现纳米MgO对硫化氢具有较好的特异性,据此设计了硫化氢催化发光传感器.通过优化设计建立了一种快速检测硫化氢的新方法,线性范围为2.00 ～200ppm(r=0.999 3),检出限为0.8 ppm(信噪比S/N=3).采用此传感器进行人工合成样品中硫化氢的加标回收分析,回收率为88.4％ ～ 97.2％.此传感器具有灵敏、快速、操作简便等优点,在硫化氢快速检测领域具有潜在应用前景.该文还探讨了硫化氢的催化发光反应机理.%The cataluminescent(CTL) phenomenon in the reaction of hydrogen sulfide on nanoMgO surface was studied.It was found that nano-MgO showed a good specificity towards hydrogen sulfide,a CTL sensor for hydrogen sulfide was developed on the basis of this phenomenon,then a rapid method for the detection of hydrogen sulfide was proposed after optimal design.The linear range for this method was 2.00-200 ppm(r =0.999 3),and the detection limit was 0.8 ppm at a signal to noise ratio(S/N) of 3.The sensor was applied in the spiked analysis of the artificial samples containing hydrogen sulfide with the recoveries between 88.4％ and 97.2％.With the advantages of sensitivity,rapidness and easy operation,the sensor showed an application potential in the rapid detection of hydrogen sulfide.The possible CTL reaction mechanism of hydrogen sulfide was also discussed.