文献类型：期刊文献

英文题名：A novel ammonia sensor utilizing cataluminescence on Nano-TiW3Cr2O14

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

年份：0

卷号：694

起止页码：184-8

外文期刊名：Materials Science Forum

收录：EI(收录号：12989608)

语种：英文

外文关键词：ammonia - carbon - chemiluminescence - desorption - gas sensors - nanofabrication - nanostructured materials - titanium compounds - tungsten compounds - visible spectra

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.