摘要
由于暴露于NO_(2)气氛的高危害性,种类繁多的NO2气体传感器得以被开发。近年来,室温气体传感器引起了研究者的广泛关注,并且已经成为该领域一个流行的发展方向。然而,在低温下,传感器的响应值很低。此外,敏感材料表面的气体分子很难脱附,这会导致其恢复过程很慢。利用静电纺丝法和随后的煅烧工艺成功合成了In_(2)O_(3)纳米纤维,通过X射线衍射、扫描电子显微镜和透射电子显微镜证实了其成分和微结构。气敏测试结果表明,基于制备的In_(2)O_(3)纳米纤维气体传感器在室温下对NO_(2)表现出高响应。更重要的是,引入了一种有效的可见光照射法对所制备的传感器的恢复过程进行了加速。基于所有的实验数据,最后提出了一些合理的机理和解释。
Due to the high harmfulness of NO_(2)exposure,various kinds of NO2 gas sensors have been explored.In recent years,gas sensors working on room temperature have drawn too much attention and become a popular development direction in this field.However,under low temperature,much lower sensor response is usually obtained.Besides,gas molecules existing on the surface of sensing materials are hard of desorption,resulting in a slow sensor recovery process.In_(2)O_(3)nanofibers were successfully synthesized by electrospinning and subsequent calcination,and their compositions and microstructures were identified by XRD,SEM and TEM.The gas-sensing test showed that the gas sensor based on as-prepared In_(2)O_(3)nanofibers had a high sensitivity to NO_(2)at room temperature.More importantly,an effective method of visible light irradiation was introduced to accelerate the recovery of the as-fabricated sensor.Based on all the experimental data,some reasonable mechanism and explanations were proposed at last.
作者
包楠
张博
倪屹
BAO Nan;ZHANG Bo;NI Yi(Engineering Research Center of IOT Technology Application(Ministry of Education),Department of Electronic Engineering,Jiangnan University,Wuxi Jiangsu 214122,China)
出处
《传感技术学报》
CAS
CSCD
北大核心
2021年第2期168-174,共7页
Chinese Journal of Sensors and Actuators
基金
国家自然科学基金项目(61903159)
江苏省自然科学基金项目(BK20190617)
中央高校基本科研业务费专项资金项目(JUSRP11925)。
