Hierarchical Assembly of α-Fe₂O₃ Nanosheets on SnO2₂Hollow Nanospheres with Enhanced Ethanol Sensing Properties.
We present the preparation of a hierarchical nanoheterostructure consisting of inner SnO2 hollow spheres (SHS) surrounded by an outer α-Fe2O3 nanosheet (FNS). Deposition of the FNS on the SHS outer surface was achieved by a facile microwave hydrothermal reaction to generate a double-shell SHS@FNS nanostructure. Such a composite with novel heterostructure acted as a sensing material for gas sensors. Significantly, the hierarchical composites exhibit excellent sensing performance toward ethanol, which is superior to the single component (SHS), mainly because of the synergistic effect and heterojunction.
State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University , Changchun 130012, People's Republic of China.
Peng
P
Sun
State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University , Changchun 130012, People's Republic of China.
Chen
C
Wang
State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University , Changchun 130012, People's Republic of China.
Jiangyang
J
Liu
State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University , Changchun 130012, People's Republic of China.
Xin
X
Zhou
State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University , Changchun 130012, People's Republic of China.
Xiaowei
X
Li
State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University , Changchun 130012, People's Republic of China.
Xiaolong
X
Hu
State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University , Changchun 130012, People's Republic of China.
Geyu
G
Lu
gas sensor; hollow nanostructure; microwave hydrothermal method; semiconductor; α-Fe2O3/SnO2 composites