文献类型：期刊文献

中文题名：基于纳米Zr_3Y_2O_9交叉敏感的苯和三甲胺传感器

英文题名：A Gaseous Benzene and Trimethylamine Sensor Based on Cross Sensitivity on Nano-Zr_3Y_2O_9

作者：周考文[1];杨宏伟[1];谷春秀[1];程艳玲[1];李文宗[1]

第一作者：周考文

通讯作者：Zhou, KW[1]

机构：[1]北京联合大学生物化学工程学院

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

中文期刊名：分析化学

外文期刊名：Chinese Journal of Analytical Chemistry

收录：CSTPCD;;Scopus;北大核心:【北大核心2011】；CSCD:【CSCD2013_2014】；

基金：北京市教委科技计划重点项目(No.KZ201311417038);北京市科学技术委员会项目(No.Z121100001312010);北京市大学生科技创新项目(No.201311417SJ031)资助

语种：中文

中文关键词：苯;三甲胺;交叉敏感;纳米复合氧化物;气体传感器

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

摘要：基于纳米Zr3Y2O9对苯和三甲胺的催化发光有交叉敏感现象,建立了同时测定空气中苯和三甲胺的新方法。在两个波长处分别确定苯和三甲胺的响应关系,再通过两个波长处的叠加发光信号准确获取苯和三甲胺的浓度。最佳实验条件为：两个分析波长分别为440和540 nm,敏感材料表面温度313℃,载气流速140 mL/min。方法的检出限（3σ）分别为苯（440 nm）0.30 mg/m^3和三甲胺（540 nm）0.70 mg/m^3,线性范围分别为苯（440 nm）0.8-105.0 mg/m^3、苯（540 nm）3.0-130.0 mg/m^3、三甲胺（440 nm）2.5-232.0 mg/m^3和三甲胺（540 nm）1.2-156.0 mg/m^3,回收率为苯96.8%-102.3%和三甲胺97.6%-103.4%。常见共存物（甲醛、乙醇、丙酮、氨、二氧化硫和二氧化碳等）不干扰测定。连续200 h通浓度均为50 mg/m^3的苯和三甲胺混合气体,发光强度的相对标准偏差低于2.0%,表明此纳米级钇锆复合氧化物对苯和三甲胺的敏感性是长寿命的。本方法充分利用了交叉敏感现象,可以实现空气中苯和三甲胺的在线分析。
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 Y2O3that 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- Zr3Y2O9which 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 ℃. The flow rate of air carrier was about 140 mL / min. The limit of detection of this method was 0. 30 mg / m^3for benzene at 440 nm and 0. 70 mg / m^3for 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^3and 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^3benzene and 50 mg / m^3TMA was 2. 0%, which demonstrated the longevity and steady performance of nano-Zr3Y2O9to benzene and TMA under this experimental conditions.