TY - JOUR
T1 - Room-temperature solid state synthesis of ZnO/α-Fe 2O 3 hierarchical nanostructures and their enhanced gas-sensing properties
AU - Huang, Limei
AU - Fan, Huiqing
PY - 2012/8
Y1 - 2012/8
N2 - A facile solid state reaction route was employed to synthesize the ZnO/α-Fe 2O 3 hierarchical nanostructures by grinding zinc acetate, α-Fe 2O 3 and sodium hydroxide with proper molar ratios together at room temperatures without any surfactant and template. Their morphological feature was characterized as self-assembled by nanosheets on which α-Fe 2O 3 nanoparticles were well sprinkled, and it was observed that the amount of α-Fe 2O 3 added significantly affected the overall morphology. Furthermore, gas-sensing properties of the obtained products were studied. The results demonstrated that the sensors based on ZnO/α-Fe 2O 3 hierarchical nanostructures exhibited a much higher sensitivity to ethanol vapor than the sensors based on pure ZnO nanostructures and the 2% α-Fe 2O 3-added ZnO/α-Fe 2O 3 nanostructures sensors showed the highest sensitivity. Additionally, the mechanism of gas sensing was also studied.
AB - A facile solid state reaction route was employed to synthesize the ZnO/α-Fe 2O 3 hierarchical nanostructures by grinding zinc acetate, α-Fe 2O 3 and sodium hydroxide with proper molar ratios together at room temperatures without any surfactant and template. Their morphological feature was characterized as self-assembled by nanosheets on which α-Fe 2O 3 nanoparticles were well sprinkled, and it was observed that the amount of α-Fe 2O 3 added significantly affected the overall morphology. Furthermore, gas-sensing properties of the obtained products were studied. The results demonstrated that the sensors based on ZnO/α-Fe 2O 3 hierarchical nanostructures exhibited a much higher sensitivity to ethanol vapor than the sensors based on pure ZnO nanostructures and the 2% α-Fe 2O 3-added ZnO/α-Fe 2O 3 nanostructures sensors showed the highest sensitivity. Additionally, the mechanism of gas sensing was also studied.
KW - Gas sensors
KW - Hierarchical nanostructures
KW - Solid state synthesis
KW - ZnO/α-Fe O
UR - http://www.scopus.com/inward/record.url?scp=84864288628&partnerID=8YFLogxK
U2 - 10.1016/j.snb.2012.06.068
DO - 10.1016/j.snb.2012.06.068
M3 - 文章
AN - SCOPUS:84864288628
SN - 0925-4005
VL - 171-172
SP - 1257
EP - 1263
JO - Sensors and Actuators, B: Chemical
JF - Sensors and Actuators, B: Chemical
ER -