Abstract
Herein, we have reported the CuO micro-polyhedrons with special exposed crystal facet, showing enhanced gas sensing performance based on improved catalytic activation of oxygen. The as-prepared CuO showed the uniform shapes of polyhedrons with the size of several micrometers and can be facilely controlled by simply adjusting the precipitants and heating steps. Then, the gas sensitive performance of CuO polyhedrons was evaluated toward typical alcohols at a working temperature of 235 °C. It showed a good sensitivity of n-butanol among several typical alcohols. Moreover, the response value of CuO-m3 (2.43) is significantly higher than that of CuO-m1 (1.92) and CuO-m2 (1.83), which is directly proportional to the exposure degree of (110) crystal facet of CuO. Analysis of mechanism showed that this crystal facet may have the best adsorption capacity of oxygen, thus more reactive oxygen can be generated via a catalytic oxidation process. Our work offered a kind of cheap oxide with exposed facet toward typical alcohols, which is very potential for the development of related industrial sensors.
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The authors sincerely acknowledge financially support by the National Natural Science Foundation of China as general projects (Grant Nos. 21872102 and 21906001).
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The authors sincerely acknowledge financially support by the National Natural Science Foundation of China as general projects (grant Nos. 21872102 and 21906001).
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The research conception and design were completed by [ZS]. Material preparation, data collection and analysis were performed by [MZ], [FG] and [FD]. The first draft of the manuscript was written by [FG] and all authors commented on previous versions of the manuscript. Author [MZ] and author [FG] have equal contributions. All authors read and approved the final manuscript.
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Zhou, M., Guo, F., Duanmu, F. et al. Enhanced sensing performance toward alcohols using copper oxide based on exposed crystal facet driven catalytic oxidation. J Mater Sci: Mater Electron 32, 26676–26687 (2021). https://doi.org/10.1007/s10854-021-07045-4
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DOI: https://doi.org/10.1007/s10854-021-07045-4