文献类型：会议论文

英文题名：A sensitive benzene gas sensor utilizing thermal desorption coupled with cataluminescence

作者：Zhou, Kaowen[1]; Yang, Hongwei[1]; Zhang, Peng[1]; Chen, Wei[1]

第一作者：周考文

通讯作者：Zhou, K.

机构：[1] Biochemical Engineering College, Beijing Union University, Beijing 100023, China

第一机构：北京联合大学生物化学工程学院

会议论文集：Proceedings - 3rd International Conference on Measuring Technology and Mechatronics Automation, ICMTMA 2011

会议日期：6 January 2011 through 7 January 2011

会议地点：Shanghai

语种：英文

外文关键词：Air quality - Bismuth compounds - Chemical sensors - Gas detectors - Thermal desorption

摘要：A new method based on cataluminescence (CTL) generated on the surface of nanosized Bi2O3 was proposed for direct determination of benzene in air. Trace benzene was firstly absorbed on active carbon at room temperature to concentrate, then desorbed at 130°C to inject. The method showed high selectivity to benzene at wavelength of 440nm, satisfying activity at reaction temperature of 315°C and good stability at air carrier flow rate of 135 ml/min. The linear range of CTL intensity versus concentration of benzene was 0.3～75 mg/m3 (γ=0.9991), and the detection limit (3σ) was 0.1 mg/m3. The recovery of testing benzene in 5 artificial air samples by this method was 96.9%-105.0%. This method allowed rapid determination of benzene in air.