Ni掺杂SnO_2花状微结构的制备及其气敏特性研究  

Synthesis of Flower-Like Nickel Doped Tin Oxide and Its Gas Sensing Properties

作　　者：杨洁[1] 王莹[1] 王泽鹏[1] 薛炎[1] 王秀[1] 胡杰[1] YANG Jie, WANG Ying, WANG Zepeng, XUE Yan, WANG Xiu, HU Jie(Micro and Nano System Research Center, College of Information Engineering, Taiyuan University of Technology, Taiyuan 030024, Chin)

机构地区：[1]太原理工大学信息工程学院微纳系统研究中心,太原030024

出　　处：《传感技术学报》2017年第12期1822-1827,共6页Chinese Journal of Sensors and Actuators

基　　金：国家自然科学基金项目(51205274);山西省高等学校科技创新项目(2016137)

摘　　要：采用水热法合成了纯SnO_2和4 mol%Ni掺杂SnO_2花状微结构。利用X射线衍射仪(XRD)、X射线能谱分析仪(EDS)和扫描电子显微镜(SEM)对其晶相、成分进行了表征,对制备的纯的和Ni掺杂SnO_2传感器性能进行了测试。实验结果表明:Ni掺杂可以显著改善SnO_2微结构的气敏特性。在最佳工作温度(280℃)条件下,4 mol%Ni掺杂SnO_2传感器对100×10-6甲醇的响应可达到13.0,其响应是纯SnO_2气体传感器的2.4倍。同时,其具有快速的响应/恢复时间(6 s/5 s),较低的检测极限(1×10-6),以及对甲醇的良好选择性。最后,对Ni掺杂SnO_2气体传感器的气敏机理进行了分析讨论。Pristine SnO_2 and 4 mol% Ni-doped SnO_2 flower-like microstructures were successfully synthesized by a facile hydrothermal method. The crystal structure and morphology of the samples were characterized by X-ray diffraction（ XRD）,energy dispersive spectroscopy（ EDS） and scanning electron microscopy（ SEM）. Furthermore,gas sensing experiments were conducted on the as-fabricated pristine and Ni-doped SnO_2 gas sensors toward methanol.The obtained results demonstrated that the introducing of Ni element can significant enhanced the gas sensing properties of SnO_2 microstructure. The measured response of Ni-doped SnO_2 toward 100×10-6 methanol can reach to 13.0 at the optimum operating temperature of 280 ℃,which is about 2.4 times higher than that of pristine SnO_2. Meanwhile,the gas sensor based on Ni-doped SnO_2 also exhibits fast response/recovery time（ ~ 6 s/5 s）,low detection limit（ 1×10^（-6）） and better selectivity to methanol. Finally,the gas sensing mechanism of Ni-doped SnO_2 gas sensor was discussed.

关 键 词：气体传感器 Ni掺杂SnO2 水热法 甲醇 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]