Li Chenjia, Lv Meng, Zuo Jialin, Huang Xintang
Institute of Nanoscience and Nanotechnology, Department of Physical Science and Technology, Central China Normal University, Wuhan 430079, China.
Sensors (Basel). 2015 Feb 5;15(2):3789-800. doi: 10.3390/s150203789.
Response of highly sensitive SnO2 semiconductor carbon monoxide (CO) gas sensors based on target gas CO quasi-molecular-imprinting mechanism design is investigated with gas concentrations varied from 50 to 3000 ppm. SnO2 nanoparticles prepared via hydrothermal method and gas sensor film devices SC (exposed to the target gas CO for 12 h after the suspension coating of SnO2 film to be fully dried, design of quasi-molecular-imprinting mechanism, the experiment group) and SA (exposed to air after the suspension coating of SnO2 film to be fully dried, the comparison group) made from SnO2 nanoparticles are all characterized by XRD, SEM and BET surface area techniques, respectively. The gas response experimental results reveal that the sensor SC demonstrates quicker response and higher sensitivity than the sensor SA does. The results suggest that in addition to the transformation of gas sensor materials, surface area, and porous membrane devices, the Molecular Imprinting Theory is proved to be another way to promote the performance of gas sensors.
基于目标气体一氧化碳（CO）准分子印迹机制设计的高灵敏度二氧化锡（SnO2）半导体一氧化碳气体传感器，在50至3000 ppm的气体浓度范围内进行了研究。通过水热法制备的SnO2纳米颗粒以及由SnO2纳米颗粒制成的气体传感器薄膜器件SC（在SnO2薄膜悬浮涂层完全干燥后暴露于目标气体CO 12小时，准分子印迹机制设计，实验组）和SA（在SnO2薄膜悬浮涂层完全干燥后暴露于空气中，对照组）分别采用XRD、SEM和BET表面积技术进行表征。气体响应实验结果表明，传感器SC比传感器SA表现出更快的响应速度和更高的灵敏度。结果表明，除了气体传感器材料、表面积和多孔膜器件的转变外，分子印迹理论被证明是提高气体传感器性能的另一种方法。
