Open AccessGas Sensing Properties of 3D Graphene Nanotubes (GNT)@ZnO at Room Temperature
Author(s) -
Lei Dong,
Yanyan Wang,
Zhekun Wu,
Weixiao Liu,
Shuyang Ying,
Man Huang,
Changsi Peng
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/446/2/022032
Subject(s) - graphene , materials science , nanowire , nanotechnology , nickel , yield (engineering) , repeatability , nanosensor , chemical engineering , optoelectronics , composite material , metallurgy , chromatography , chemistry , engineering
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 NO 2 . The as-prepared GNT@ZnO sensor displayed high sensitivity towards the detection of NO 2 reaching up to 47.5% per 50 ppm NO 2 . 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.