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Chin. Phys. B, 2021, Vol. 30(2): 020701    DOI: 10.1088/1674-1056/abcf46
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In-situ fabrication of ZnO nanoparticles sensors based on gas-sensing electrode for ppb-level H2S detection at room temperature

Jing-Yue Xuan(宣景悦)1,†, Guo-Dong Zhao(赵国栋)1,†, Xiao-Bo Shi(史小波)2, Wei Geng(耿伟)1, Heng-Zheng Li(李恒征)1, Mei-Ling Sun(孙美玲)1, Fu-Chao Jia(贾福超)1, Shu-Gang Tan(谭树刚)1, Guang-Chao Yin(尹广超)1,‡, and Bo Liu(刘波)1,§
1 Laboratory of Functional Molecular and Materials, School of Physics and Optoelectronic Engineering, Shandong University of Technology, Zibo 255000, China; 2 Institute of Artificial Intelligence, Henan Finance University, Zhengzhou 450046, China
Abstract  The zinc oxide (ZnO) nanoparticles (NPs) sensors were prepared in-situ on the gas-sensing electrodes by a one-step simple sol-gel method for the detection of hydrogen sulfide (H2S) gas. The sphere-like ZnO NPs were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), x-ray diffraction (XRD), energy dispersive x-ray analysis (EDX), and their H2S sensing performance were measured at room temperature. Testing results indicate that the ZnO NPs exhibit excellent response to H2S gas at room temperature. The response value of the optimal sample to 750 ppb H2S is 73.3%, the detection limit reaches to 30 ppb, and the response value is 7.5%. Furthermore, the effects of the calcining time and thickness of the film on the gas-sensing performance were investigated. Both calcining time and film thickness show a negative correlation with the H2S sensing performance. The corresponding reaction mechanism of H2S detection was also discussed.
Keywords:  ZnO      H2S gas sensor      room temperature  
Published:  26 January 2021
PACS:  07.07.Df (Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing)  
  77.55.hf (ZnO)  
  78.67.Bf (Nanocrystals, nanoparticles, and nanoclusters)  
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11904209 and 61904098), the Natural Science Foundation of Shandong Province, China (Grant No. ZR2019QF018), and Higher Education Research and Development Program of Shandong Province, China (Grant No. J18KA242).
Corresponding Authors:  These authors contributed equally to the work. Corresponding author. E-mail: §Corresponding author. E-mail:   

Cite this article: 

Jing-Yue Xuan(宣景悦), Guo-Dong Zhao(赵国栋), Xiao-Bo Shi(史小波), Wei Geng(耿伟), Heng-Zheng Li(李恒征), Mei-Ling Sun(孙美玲), Fu-Chao Jia(贾福超), Shu-Gang Tan(谭树刚), Guang-Chao Yin(尹广超), and Bo Liu(刘波) In-situ fabrication of ZnO nanoparticles sensors based on gas-sensing electrode for ppb-level H2S detection at room temperature 2021 Chin. Phys. B 30 020701

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