异质结
纳米棒
X射线光电子能谱
材料科学
化学气相沉积
扫描电子显微镜
选择性
沉积(地质)
分析化学(期刊)
纳米技术
光电子学
化学工程
化学
复合材料
生物化学
生物
色谱法
工程类
古生物学
催化作用
沉积物
作者
Mingjia Bai,Mei Chen,Xu Li,Qingji Wang
标识
DOI:10.1016/j.snb.2022.132738
摘要
A highly selective and response value NO2 gas sensor depended on ZnO/SnO2 heterojunction was fabricated in one step by chemical vapor deposition (CVD). The ZnO nanorod/SnO2 film heterojunction samples were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Energy-dispersive X-ray spectroscopy (EDS), and X-ray photoelectron spectroscopy (XPS). The gas-sensing performances are investigated under different NO2 concentrations, and the sensor has a high response value in the range of 0.05–1000 ppm with values of 370 % for 50 ppm. Meanwhile, the sensor has good selectivity and repeatability to NO2, and the response value of the sensor to NO2 is 5 times that of ethanol, which is the second-best response gas. These results show that it is a feasible scheme to prepare NO2 gas sensor based on ZnO/SnO2 heterojunction by CVD in one step. We believe that the strategy of synthesizing metal oxide with heterostructures based on this method provides a novel insight for the next generation of gas sensors.
科研通智能强力驱动
Strongly Powered by AbleSci AI