TY - JOUR
T1 - In2O3/SnO2 heterojunction microstructures
T2 - Facile room temperature solid-state synthesis and enhanced Cl2 sensing performance
AU - Li, Pei
AU - Fan, Huiqing
AU - Cai, Yu
PY - 2013
Y1 - 2013
N2 - A facile room temperature solid-state reaction route was employed to synthesize the In2O3/SnO2 heterojunction microstructures by grinding indium nitrate hydrate, tin dioxide and sodium hydroxide with proper molar ratios together without any surfactant and template. Their morphological feature is characterized as self-assembled by irregular-shaped nanospheres, and it was observed that a large quantity of nanocrystals with the size of 20-50 nm were present on In2O 3 sphere surfaces. The introduction of a small quantity of SnO 2 in the reaction system was played an important role in the size- and shape-control. Furthermore, gas sensing properties of them were characterized in detail. The sensor based on In2O3/ SnO2 heterojunction microstructures exhibited a much higher response to Cl2 than the sensor based on pure In2O3 nanostructures, and the In/Sn = 12:1 (molar ratio) sample showed the highest response with quick response-recovery behavior as well as good selectivity and stability. The largest surface area of the In2O3/SnO 2 heterojunction microstructures was also clarified by the analysis of nitrogen adsorption-desorption test, which contributes the great enhancement of the Cl2 gas sensing properties.
AB - A facile room temperature solid-state reaction route was employed to synthesize the In2O3/SnO2 heterojunction microstructures by grinding indium nitrate hydrate, tin dioxide and sodium hydroxide with proper molar ratios together without any surfactant and template. Their morphological feature is characterized as self-assembled by irregular-shaped nanospheres, and it was observed that a large quantity of nanocrystals with the size of 20-50 nm were present on In2O 3 sphere surfaces. The introduction of a small quantity of SnO 2 in the reaction system was played an important role in the size- and shape-control. Furthermore, gas sensing properties of them were characterized in detail. The sensor based on In2O3/ SnO2 heterojunction microstructures exhibited a much higher response to Cl2 than the sensor based on pure In2O3 nanostructures, and the In/Sn = 12:1 (molar ratio) sample showed the highest response with quick response-recovery behavior as well as good selectivity and stability. The largest surface area of the In2O3/SnO 2 heterojunction microstructures was also clarified by the analysis of nitrogen adsorption-desorption test, which contributes the great enhancement of the Cl2 gas sensing properties.
KW - Gas sensor
KW - Heterojunction microstructures
KW - InO/SnO
KW - Room temperature solid-state synthesis
UR - http://www.scopus.com/inward/record.url?scp=84878634537&partnerID=8YFLogxK
U2 - 10.1016/j.snb.2013.05.010
DO - 10.1016/j.snb.2013.05.010
M3 - 文章
AN - SCOPUS:84878634537
SN - 0925-4005
VL - 185
SP - 110
EP - 116
JO - Sensors and Actuators, B: Chemical
JF - Sensors and Actuators, B: Chemical
ER -