TY - JOUR
T1 - Ultrasensitive NO2 gas sensor based on Sb-doped SnO2 covered ZnO nano-heterojunction
AU - Wang, Zhaohua
AU - Zhi, Mingfeng
AU - Xu, Manzhang
AU - Guo, Chen
AU - Man, Zhenwu
AU - Zhang, Zhiyong
AU - Li, Qiang
AU - Lv, Yuanyuan
AU - Zhao, Wu
AU - Yan, Junfeng
AU - Zhai, Chunxue
N1 - Publisher Copyright:
© 2021, The Author(s), under exclusive licence to Springer Science+Business Media, LLC part of Springer Nature.
PY - 2021/4
Y1 - 2021/4
N2 - Abstract: Sb-doped SnO2 covered ZnO nano-heterojunction (Sb-doped SnO2/ZnO NHs) are prepared by using a microwave hydrothermal method. The effect about morphology and gas sensor performance of the SnO2/ZnO NHs with Sb-doping is studied in detail. The SEM indicated that the morphology of SnO2 changed from nanowires to nanosheets by Sb-doping and the growth direction of SnO2 was vertical to the plane of ZnO from the TEM. Compared with undoped SnO2/ZnO NHs, the gas sensor response became higher as the concentration of Sb-doping increased which shows the sensor performance can be enhanced by Sb-doped SnO2. The change of morphology by Sb-doping increased the number of surface active sites and defects. In addition, a certain concentration of O vacancy was induced by Sb-doping to provide more free electrons that can also be captured by NO2. The research may provide a reference for studying the effect of Sb-doped composite materials and gas sensor performance. Graphical abstract: [Figure not available: see fulltext.]
AB - Abstract: Sb-doped SnO2 covered ZnO nano-heterojunction (Sb-doped SnO2/ZnO NHs) are prepared by using a microwave hydrothermal method. The effect about morphology and gas sensor performance of the SnO2/ZnO NHs with Sb-doping is studied in detail. The SEM indicated that the morphology of SnO2 changed from nanowires to nanosheets by Sb-doping and the growth direction of SnO2 was vertical to the plane of ZnO from the TEM. Compared with undoped SnO2/ZnO NHs, the gas sensor response became higher as the concentration of Sb-doping increased which shows the sensor performance can be enhanced by Sb-doped SnO2. The change of morphology by Sb-doping increased the number of surface active sites and defects. In addition, a certain concentration of O vacancy was induced by Sb-doping to provide more free electrons that can also be captured by NO2. The research may provide a reference for studying the effect of Sb-doped composite materials and gas sensor performance. Graphical abstract: [Figure not available: see fulltext.]
UR - https://www.scopus.com/pages/publications/85100586867
U2 - 10.1007/s10853-020-05737-6
DO - 10.1007/s10853-020-05737-6
M3 - 文章
AN - SCOPUS:85100586867
SN - 0022-2461
VL - 56
SP - 7348
EP - 7356
JO - Journal of Materials Science
JF - Journal of Materials Science
IS - 12
ER -