Hydrothermal Synthesis of CuO Nanoplates For Gas Sensor
Main Article Content
Abstract
Metal oxide nanomaterials have been widely utilized in gas sensors due to their excellent performance. Comparing to n-type metal oxides, p-type ones have been less studied for gas sensing applications. In this work, CuO nanoplates were synthesized at different temperatures by a facile hydrothermal route at different temperatures without using any surfactant to study the effect on the gas sensing properties. The morphologies and crystal structures of the synthesized materials were characterized by field-emission scanning electron microscopy (FE-SEM) and X-ray diffraction (XRD). Gas sensing characteristics were measured at various concentrations of H₂ in the range of 50-1000 ppm at working temperatures from 250 to 400°C. The results demonstrated that the synthesized CuO nanoplates exhibited p-type semiconducting behavior when the sensor resistance increased upon exposure to H₂. The sensing mechanism for the gas sensing behavior of CuO nanoplates was also mentioned.
Keywords
CuO nanoplates, hydrothermal, H₂ sensing
Article Details
References
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[4] Ling Zhu, Wen Zeng, Room-temperature gas sensing of ZnO-based gas sensor: A review, Sensors and Actuators A: Physical, 267 (2017), 242–261. doi:10.1016/j.sna.2017.10.021.
[5] Yunshi Liu, Xing Gao, Feng Li, Geyu Lu, Tong Zhang, Nicolae Barsan, Pt-In₂O₃ mesoporous nanofibers with enhanced gas sensing performance towards ppb-level NO₂ at room temperature, Sensors and Actuators B: Chemical, 260 (2018) 927–936.
[6] Ananya Dey, Semiconductor metal oxide gas sensors: A review, Materials Science and Engineering: B, 229 (2018), 206–217.
[7] D. T. T. Le, Matteo T., N. V. Hieu, Hydrothermal growth and hydrogen selective sensing of nickel oxide nanowires, Journal of Nanomaterials, Volume 2015, Article ID 785856, 8 pages.
[8] O. Lupan, V. Postica, N. Ababii, M. Hoppe, V. Cretu, I. Tiginyanu, V. Sontea, Th. Pauporté, B. Viana, R. Adelung, Influence of CuO nanostructures morphology on hydrogen gas sensing performances, Microelectronic Engineering, 164 (2016) 63–70.
[9] Hao Liu, Xiweng Du, Xianran Xing, Guoxiu Wang, Shi Zhang Qiao, Highly ordered mesoporous Cr₂O₃ materials with enhanced performance for gas sensors and lithium ion batteries, Chem. Commun., 2012, 48, 865–867. doi:10.1016/j.snb.2017.01.205.
[10] P. L. Quang, N. D. Cuong, T. T. Hoa, H. T. Long, C. M. Hung, D. T. T. Le, N. V. Hieu, Simple post-synthesis of mesoporous p-type Co₃O₄ nanochains for enhanced H₂S gas sensing performance, Sensors and Actuators B: Chemical, 270 (2018) 158–166.
[11] H. J. Kim, J. H. Lee, Highly sensitive and selective gas sensors using p-type oxide semiconductors: Overview, Sensors and Actuators B: Chemical, 192 (2014) 607–627.
[12] J. Yang, S. Wang, L. Zhang, T. Dong, Z. Zhu, X. Gao, Zn₂SnO₄-doped SnO₂ hollow spheres for phenylamine gas sensor application, Sensors and Actuators B: Chemical, 239 (2017) 857–864. doi:10.1016/j.snb.2016.08.074.
[13] Lin Hou, Chunmei Zhang, Lei Li, Cheng Du, Xiaokun Li, Xiao-Feng Kang, Wei Chen, CO gas sensors based on p-type CuO nanotubes and CuO nanocubes: Morphology and surface structure effects on the sensing performance, Talanta, 188 (2018) 41–49.