TY - JOUR
T1 - High sensitivity and low detection limit of acetone sensor based on NiO/Zn2SnO4 p-n heterojunction octahedrons
AU - Zhou, Chaoge
AU - Meng, Fanqi
AU - Chen, Ke
AU - Yang, Xueli
AU - Wang, Tianshuang
AU - Sun, Peng
AU - Liu, Fangmeng
AU - Yan, Xu
AU - Shimanoe, Kengo
AU - Lu, Geyu
N1 - Funding Information:
This work is supported by the National Nature Science Foundation of China (Nos. 61833006 and 61831011). Science and Technology Development Program of Jilin Province (No. 20200301010RQ). Program for JLU Science and Technology Innovative Research Team JLUSTIRT (2017TD-07). Fundamental Research Funds for the Central Universities.
Publisher Copyright:
© 2021
PY - 2021/7/15
Y1 - 2021/7/15
N2 - In this work, we successfully prepare the octahedral NiO/Zn2SnO4 p-n heterostructure by a simple hydrothermal synthesis and subsequent wet impregnation process. The microscopic morphology characterization results show that the as-prepared composites are uniformly dispersed and have an octahedral structure with a size of 3−5 μm. The gas devices are fabricated and their sensing performances are investigated systematically. The response and selectivity of NiO/Zn2SnO4 composites to acetone have been significantly improved than that of pure Zn2SnO4. Moreover, the response of the sensor to 100 ppb acetone is 1.4 at 300 °C, indicating that the detection limit is less than 100 ppb. The enhancement in sensing properties of composites is largely due to the p-n heterojunction formed by NiO and Zn2SnO4, which causes the transfer of carriers and the catalytic effect of NiO.
AB - In this work, we successfully prepare the octahedral NiO/Zn2SnO4 p-n heterostructure by a simple hydrothermal synthesis and subsequent wet impregnation process. The microscopic morphology characterization results show that the as-prepared composites are uniformly dispersed and have an octahedral structure with a size of 3−5 μm. The gas devices are fabricated and their sensing performances are investigated systematically. The response and selectivity of NiO/Zn2SnO4 composites to acetone have been significantly improved than that of pure Zn2SnO4. Moreover, the response of the sensor to 100 ppb acetone is 1.4 at 300 °C, indicating that the detection limit is less than 100 ppb. The enhancement in sensing properties of composites is largely due to the p-n heterojunction formed by NiO and Zn2SnO4, which causes the transfer of carriers and the catalytic effect of NiO.
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U2 - 10.1016/j.snb.2021.129912
DO - 10.1016/j.snb.2021.129912
M3 - Article
AN - SCOPUS:85103768753
SN - 0925-4005
VL - 339
JO - Sensors and Actuators B: Chemical
JF - Sensors and Actuators B: Chemical
M1 - 129912
ER -