基于CoFe_(2-x)Ce_xO_4纳米晶粒的丙酮传感器研究  

Research on Acetone Sensor Based on CoFe_(2-x)Ce_xO_4 Nanocrystalline

作　　者：宣亚文[1] 胡明江[2] 

机构地区：[1]周口师范学院物理与机电工程学院,河南周口466001 [2]河南城建学院能源与建筑环境工程学院,河南平顶山467036

出　　处：《仪表技术与传感器》2015年第5期14-16,23,共4页Instrument Technique and Sensor

基　　金：河南省科技厅重点攻关计划项目(112102210363);河南省高等学校重点科研项目(15A470006)

摘　　要：采用喷雾热分解法制备了Co Fe2-xCexO4纳米晶粒,利用丝网印刷技术均匀涂于带有2个金电极的氧化铝基板表面形成敏感薄膜,设计了一种薄膜型丙酮传感器。采用X射线衍射仪和热场发射扫描电子显微镜,表征了Co Fe2-x CexO4纳米晶粒的相组成和微观形貌,分析了Ce掺杂含量对丙酮传感器敏感性的影响机理。在气体传感器敏感特性测试系统上,测试了丙酮传感器灵敏度、抗干扰、长期稳定和动态响应等特性。结果表明,以Ce3为敏感薄膜的丙酮传感器灵敏度为179%,动态响应时间为9 s,恢复时间为12 s,持续工作时间为9.2月。这表明以Ce3为敏感薄膜的传感元件可实现汽车尾气中丙酮污染物的在线检测。CoFe2-x Cex O4 nanocrystalline was prepared by spray pyrolysis process.A film-type of acetone gas sensor was designed with CoFe2-x Cex O4 nanocrystalline transferred onto the surface of the alumina substrate with two Au-electrodes by screen printing technique.The phase composition and morphology of acetone gas sensor were investigated by XRD and SEM respectively. Effect discipline of Ce doping content on the sensitivity of acetone sensor was analyzed.The characteristics including sensitive performance,dynamic response,interference and long-term stability of acetone sensor were tested on gas sensor test system.The con-clusion demonstrates that the sensitivity of acetone gas sensor of acetone gas sensor based on Ce3 composite nanomaterial is 179%, the dynamic response time is 9 s,and the recover time is 12 s,and its continuous work time is 9.2 months,ensuring that acetone gas sensor based on Ce3 can detect acetone emission of vehicles quickly and accurately.

关 键 词：喷雾热分解法 纳米晶粒 敏感薄膜 丙酮传感器 柴油机 在线检测 

分 类 号：TK413.7[动力工程及工程热物理—动力机械及工程]