文献类型：期刊文献

英文题名：A Gaseous Benzene and Trimethylamine Sensor Based on Cross Sensitivity on Nano-Zr₃Y₂O₉

作者：Zhou Kao-Wen[1];Yang Hong-Wei[1];Gu Chun-Xiu[1];Cheng Yan-Ling[1];Li Wen-Zong[1]

第一作者：周考文

通讯作者：Zhou, KW[1]

机构：[1]Beijing Union Univ, Coll Biochem Engn, 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, Coll Biochem Engn, 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;

年份：2014

卷号：42

期号：6

起止页码：805-810

外文期刊名：CHINESE JOURNAL OF ANALYTICAL CHEMISTRY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000346724000002)】；

语种：英文

外文关键词：Benzene; Trimethylamine; Cross sensitivity; Nanometer composite oxide; Gas sensor

摘要：A novel method based on cross sensitivity of cataluminescence (CTL) generated on the surface of a nanometer composite oxide was proposed for simultaneous determination of benzene and trimethylamine (TMA) in air. A variety of nanometer composite oxides based on Y2O3 that showed catalytic activity to many gas molecules were synthesized. For the fabrication of the detector, nanometer composite oxide was directly coated on the ceramic rod to form a 0.1-0.15 mm thick layer. The ceramic rod with nanometer composite oxide was inserted into a quartz tube with an inner diameter of 10 mm. The temperature of nanometer composite oxide was controlled by the digital heater. When gas samples passed through the nanometer composite oxide in the quartz tube by the air flow, the CTL was generated during the catalytic oxidation on the surface of the nanometer composite oxide. The CTL signals were respectively recorded by two ultra weak chemiluminescence analyzers. The CTL intensity and selectivity for the determination of benzene and TMA on nano. Zr3Y2O9 which was characterized by TEM were bigger and better than those on other nanosized composite oxides. The optimum experimental conditions were tested. Selective determination was achieved at a wavelength of 440 nm for benzene and 540 nm for TMA. The surface temperature of the nanometer materials was about 313 degrees C. The flow rate of air carrier was about 140 mL/min. The limit of detection of this method was 0.30 mg/m(3) for benzene at 440 nm and 0.70 mg/m(3) for TMA at 540 nm. The linear range of CTL intensity versus concentration of benzene at 440 nm was 0.8-105.0 mg/m(3), benzene at 540 nm was 3.0-130.0 mg/m(3), TMA at 440 nm was 2.5-232.0 mg/m(3) and TMA at 540 nm was 1.2-156.0 mg/m(3). The recovery of 5 testing standard samples by this method was 96.8%-102.3% for benzene and 97.6%-103.4% for TMA. Common coexistence matters, such as formaldehyde, ethanol, acetone, ammonia, sulfur dioxide and carbon dioxide, did not disturb the determination. The relative standard deviation (RSD) of CTL signals of a continuous 200 h detection of gas mixture of 50 mg/m(3) benzene and 50 mg/m(3) TMA was 2.0%, which demonstrated the longevity and steady performance of nano. Zr3Y2O9 to benzene and TMA under this experimental conditions.