花状WO3纳米结构的水热合成及其甲醛气敏研究  

Hydrothermal Synthesis of Flower-Like WO3 Nanostructure and Its Gas Sensing to Formaldehyde

作　　者：林珑[1] 彭姝迪 吕程[1] 周渠[3] 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)

机构地区：[1]重庆水利电力职业技术学院,重庆402160 [2]国网重庆市电力公司电力科学研究院,重庆401123 [3]西南大学工程技术学院,重庆400715

出　　处：《传感技术学报》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)

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.

关 键 词：气体传感器 WO3 纳米花 HCHO 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]