文献类型：会议论文

英文题名：A novel ammonia sensor utilizing cataluminescence on nano-TiW 3Cr2O14

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, 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

通讯机构：[1]Biochemical Engineering College, Beijing Union University, Beijing 100023, 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：Frontier of Nanoscience and Technology

语种：英文

外文关键词：Tungsten compounds - Titanium compounds - Chemical sensors - Chromium compounds - Gas detectors

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°C to determine. The sensor showed high selectivity to ammonia at wavelength of 540 nm, satisfying activity at temperature of 275°C and good stability at air carrier flow rate of 115 ml/min. The linear range of CTL intensity versus concentration of ammonia was 1.0～50 mg/m3 (γ=0.9990), and the detection limit (3σ) 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.