文献类型：会议论文

英文题名：A Novel Ammonia Sensor Utilizing Cataluminescence on Nano-TiW3Cr2O14

作者：Zhou, Kaowen[1];Zhang, Ziqiao[1];Xing, Lijing[1];Li, Xin[1];Fu, Chunxue[1]

第一作者：周考文

通讯作者：Zhou, KW[1]

机构：[1]Beijing Union Univ, Biochem Engn Coll, Beijing 100023, Peoples R China

第一机构：北京联合大学生物化学工程学院

通讯机构：[1]corresponding author), Beijing Union Univ, Biochem Engn Coll, Beijing 100023, Peoples R China.|[1141726]北京联合大学生物化学工程学院;[11417]北京联合大学;

会议论文集：International Conference on Frontier of Nanoscience and Technology (ICFNST 2011)

会议日期：SEP 28-29, 2011

会议地点：Kunming, PEOPLES R CHINA

语种：英文

外文关键词：Cataluminescence; Ammonia; Gas sensor; Nanosized TiW3Cr2O14

摘要：A new sensor based on cataluminescence (CTL) produced on the surface of nanosized TiW3Cr2O14 was demonstrated for direct determination of ammonia in air. Trace ammonia was firstly absorbed on active carbon at room temperature to concentrate, then desorbed at 105 degrees C to determine. The sensor showed high selectivity to ammonia at wavelength of 540 nm, satisfying activity at temperature of 275 degrees C and good stability at air carrier flow rate of 115 ml/min. The linear range of CTL intensity versus concentration of ammonia was 1.0 similar to 50 mg/m3 (gamma=0.9990), and the detection limit (3 sigma) was 0.5 mg/m3. The recovery of artificial sample was 97.45%-102.73% by this method. There was no response to benzene, SO2, CO and formaldehyde, and insignificant response to ethanol. This gas sensor allows on-line monitoring of ammonia in air.