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化学学报
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化学学报 ›› 2010, Vol. 68 ›› Issue (9): 921-925. 上一篇    下一篇

研究论文

基于纳米复合氧化物催化发光的乙醇传感器

周考文*，张鹏，陈魏   

  1. (北京联合大学生物化学工程学院 北京 100023)
  • 投稿日期:2008-11-03 修回日期:2009-08-31 发布日期:2009-12-25
  • 通讯作者: 周考文 E-mail:zhoukaowen@gmail.com

A Gaseous Ethanol Sensor Based on Cataluminescence on Nanometer Composite Oxide

ZHOU Kao-Wen, ZHANG Feng, CHEN Wei   

  1. (Biochemical Engineering College, Beijing Union University, Beijing 100023)
  • Received:2008-11-03 Revised:2009-08-31 Published:2009-12-25
  • Contact: ZHOU Kao-Wen E-mail:zhoukaowen@gmail.com

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被引次数

7 | 3

基于纳米材料上乙醇的催化发光现象, 建立了直接测定空气中乙醇浓度的方法. 实验发现, 乙醇在纳米级钛锆镧(原子比为5∶2∶1)复合氧化物表面有较高的发光强度和较好的选择性, 以此为敏感材料可以建立一种高效稳定的乙醇气体传感器, 其最佳操作条件为: 分析波长620 nm, 测定温度310 ℃, 载气流速130 mL/min. 方法的检测限为(3σ) 1.3 mg/m3, 线性范围为2～230 mg/m3, 相关系数为0.9990, 回收率为97.4%～102.7%. 对常见共存物的研究发现, 甲醛、丙酮、苯、氨、二氧化硫和二氧化碳都不干扰测定, 该传感器的连续工作时间可达120 h以上.

关键词: 乙醇, 催化发光, 纳米复合氧化物, 传感器

An efficient, steady method based on cataluminescence (CTL) generated on the surface of a nanometer composite oxide was proposed for direct determination of ethanol in air. The gas sensor using nano-TiO2-ZrO2-La2O3 (Ti∶Zr∶La＝5∶2∶1) as a probe showed high selectivity for ethanol at a wavelength of 620 nm and satisfying activity at the surface temperature of 310 ℃. The optimum flow rate of air carrier was around 130 mL/min. The detection limit of this method was 1.3 mg/m3. The linear range of CTL intensity versus concentration of ethanol was 2～230 mg/m3, and the correlation coefficient was 0.9990. The recovery of 10 testing standard ethanol samples by this method was 97.4%～102.7%. Common coexistence matters, such as formaldehyde, acetone, benzene, ammonia, sulfur dioxide and carbon dioxide, did not disturb the determination of ethanol. The gas sensor displayed good stability for continuously introducing ethanol over 120 h.

Key words: ethanol, cataluminescence, nanometer composite oxide, sensor