SnO2-ZnO复合纳米纤维的制备及其二氧化硫气敏性能研究  

Preparation of SnO2-ZnO composite nanofiber and its sensitivity to sulfur dioxide

作　　者：廖一铭 李宝亮 彭姝迪 卢昭睿 周渠[1] LIAO Yiming;LI Baoliang;PENG Shudi;LU Zhaorui;ZHOU Qu(College of Engineering and Technology,Southwestern University,Chongqing 400716,China;State Grid Chongqing Power Science Research Institute of Electric Power Company,Chongqing 401123,China)

机构地区：[1]西南大学工程技术学院,重庆400716 [2]国网重庆市电力公司电力科学研究院,重庆401123

出　　处：《电子元件与材料》2020年第8期33-38,共6页Electronic Components And Materials

基　　金：国家自然科学基金(51507144)。

摘　　要：采用静电纺丝和退火相结合的方法合成了SnO2-ZnO复合纳米纤维结构,通过X射线粉末衍射仪(XRD)、场发射扫描电子显微镜(FESEM)、X射线能谱(EDS)对材料的晶体结构和微观形貌进行了表征。同时基于合成的纤维状SnO2-ZnO纳米结构制备了旁热式气体传感器,通过CGS-8智能气敏分析系统测试了其对SO2气体的气敏性能。结果表明:在200℃的最佳工作温度下,SnO2-ZnO复合纳米纤维气体传感器对50μL/L SO2气体的响应达到35.0,是纯ZnO传感器的2.3倍。制备的SnO2-ZnO纳米纤维传感器对SO2气体的检测限度可低至1μL/L。最后,讨论了SnO2-ZnO复合纳米纤维传感器对SO2的气敏机理。SnO2-ZnO nanofiber composite structure was synthesized by means of electrostatic spinning and annealing.The crystallography and microstructure of the electrospun SnO2-ZnO samples were characterized by field emission scanning electron microscope(FESEM)and X-ray diffraction(XRD).The composition of the sensitive nanomaterials was identified by energy dispersive X-ray spectrometers(EDS).Meanwhile,the side-heat gas sensors based on the fiber-like SnO2-ZnO nanomaterials were prepared.The gas sensing property of SO2 gas was studied based on CGS-8 intelligent gas detection and analysis system.The results show that the sensitivity of the sensor to 50μL/L SO2 gas is 35.0 at the optimum operating temperature(200℃),which is 2.3 times larger than that of pure ZnO sensor.The prepared SnO2-ZnO nanofibers sensor reduces the minimum detection concentration of SO2 gas to 1μL/L.Finally,the gas sensing mechanism of SnO2-ZnO composite nanofiber sensor to SO2 gas was discussed.

关 键 词：静电纺丝法 SnO2-ZnO复合纳米纤维 SO2气体 气敏性能 气敏机理 

分 类 号：TP212.2[自动化与计算机技术—检测技术与自动化装置]