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

机构：[1] Biochem. Eng. Coll., Beijing Union Univ., Beijing, China

第一机构：北京联合大学生物化学工程学院

会议日期：6-7 Jan. 2011

会议地点：Shangshai, China

语种：英文

外文关键词：gas sensors - nanosensors - nanostructured materials - thermally stimulated 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 440 nm, 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.