摘要
采用中温水热法合成了三维花状WO3纳米结构,通过X射线衍射仪(XRD)和扫描电子显微镜(SEM)对样品的物相成分及微观形貌进行了表征。同时基于合成的花状WO3纳米材料制备了气敏元件,测试了其在200℃的最佳工作温度下,对体积分数为40×10^-6的HCHO气体的气敏性能。结果表明,该气敏元件对HCHO气体有优异的选择性及稳定性,同时对HCHO气体灵敏度可达18.57。
Three-dimensional flower-like WO3 nanostructure was synthesized by the middle temperature hydrothermal method. The phase composition and morphology of the sample was characterized by X-ray diffraction(XRD)and scanning electron microscopy(SEM). Meanwhile,a gas sensor based on the synthetic flower-like WO3 nanomaterial was fabricated,and its gas sensitivity to 40×10^-6 formaldehyde gas was tested at the optimum operating temperature of 200 ℃. The results show that the gas sensor has excellent selectivity and stability to formaldehyde,and its sensitivity to formaldehyde gas is 18.57.
作者
林珑
彭姝迪
吕程
周渠
LIN Long;PENG Shudi;LU Cheng;ZHOU Qu(Chongqing Water Resources and Electric Engineering College, Chongqing 402160, China;Chongqing Electric Power Research Institute, State Grid Chongqing Electric Power Company, Chongqing 401123, China;College of Engineering and Technology,Southwest University,Chongqing 400715,China)
出处
《传感技术学报》
CAS
CSCD
北大核心
2019年第6期834-837,共4页
Chinese Journal of Sensors and Actuators
基金
重庆市自然科学基金项目(cstc2016jcyjA0400)
关键词
气体传感器
WO3
纳米花
HCHO
气敏性能
气敏机理
gas sensor
tungsten trioxide
nanoflowers
formaldehyde
gas sensing performance
gas sensing mechanism
