Gas Sensing Properties of 3D Graphene Nanotubes (GNT)@ZnO at Room Temperature. Issue 2 (February 2020)

• Record Type: Journal Article
• Authors: Dong, Lei; Wang, Yanyan; Wu, Zhekun; Liu, Weixiao; Ying, Shuyang; Huang, Manman; Peng, Changsi
• Is Part Of: IOP conference series. Volume 446:Issue 2(2020)
• Publication Date: 2020-02
• Subjects: Earth sciences -- Periodicals; Environmental sciences -- Congresses; Environmental sciences -- Periodicals; 550.5
• DOI: 10.1088/1755-1315/446/2/022032
• Languages: English
• ISSNs: 1755-1307

Abstract

Abstract: In this study, nickel nanowires (Ni-NWs) were first grown by chemical method and then graphene was grown on the as-obtained Ni-NWs by CVD route to yield graphene nanotubes (GNTs). The GNTs were then hydrothermally combined with ZnO to construct a gas sensor for detection of NO2 . The as-prepared GNT@ZnO sensor displayed high sensitivity towards the detection of NO2 reaching up to 47.5% per 50 ppm NO2 . In addition, the sensor exhibited relatively fast response time of 300 s and recovery time of around 200 s under UV light. The sensor also showed good repeatability, making it promising for future applications.