Tang Huarong, Li Yaming, Zheng Chengbin, Ye Jun, Hou Xiandeng, Lv Yi
Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China.
Talanta. 2007 Jun 15;72(4):1593-7. doi: 10.1016/j.talanta.2007.01.035. Epub 2007 Jan 20.
A novel gas sensor for the determination of ethanol was proposed in the present work, which was based on the generated cataluminescence emission from catalytic oxidation of ethanol on the surface of ZnO nanoparticles. The cataluminescence characteristics and the effect of different parameters on the signal intensity, such as morphology of synthesized ZnO, temperature and flow rate, were discussed in detail. Under the optimized experimental conditions, the calibration curve of cataluminescence intensity versus ethanol vapor concentration was linear in the range 1.0-100ppm, and with a detection limit of 0.7ppm (S/N=3). Compared with the traditional electrical conductivity-based ZnO gas sensor for the determination of ethanol, the proposed ethanol sensor showed the advantages of high sensitivity, high selectivity and low working temperature.
本工作提出了一种用于测定乙醇的新型气体传感器，它基于乙醇在ZnO纳米颗粒表面催化氧化产生的催化发光发射。详细讨论了催化发光特性以及不同参数（如合成ZnO的形态、温度和流速）对信号强度的影响。在优化的实验条件下，催化发光强度与乙醇蒸气浓度的校准曲线在1.0 - 100ppm范围内呈线性，检测限为0.7ppm（S/N = 3）。与传统的基于电导率的用于测定乙醇的ZnO气体传感器相比，所提出的乙醇传感器具有高灵敏度、高选择性和低工作温度的优点。
