1. School of Materials Science and Engineering, Anhui Polytechnic University, Wuhu 241000, China 2. Key Laboratory of Functional Molecular Solids (Ministry of Education), College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, China 3. Modern Technology Center, Anhui Polytechnic University, Wuhu 241000, China
A sea-urchin-like CuO/ZnO porous nanostructure is obtained via a simple solution method followed by a calcination process. There are abundant pores among the resulting nanowires due to the thermal decomposition of copper–zinc hydroxide carbonate. The specific surface area of the as-prepared CuO/ZnO sample is determined as 31.3 m2·g−1. The gas-sensing performance of the sea-urchin-like CuO/ZnO sensor is studied by exposure to volatile organic compound (VOC) vapors. With contrast to a pure porous sea-urchin-like ZnO sensor, the sea-urchin-like CuO/ZnO sensor shows superior gas-sensing behavior for acetone, formaldehyde, methanol, toluene, isopropanol and ethanol. It exhibits a high response of 52.6–100 ppm acetone vapor, with short response/recovery time. This superior sensing behavior is mainly ascribed to the porous nanowire-assembled structure with abundant p–n heterojunctions.
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Y C Liang, Y C Chang. The effect of Ni content on gas-sensing behaviors of ZnO–NiO p–n composite thin films grown through radio-frequency cosputtering of ceramic ZnO and NiO targets. CrystEngComm, 2020, 22(13): 2315–2326 https://doi.org/10.1039/D0CE00052C
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S Kulkarni, R Ghosh. A simple approach for sensing and accurate prediction of multiple organic vapors by sensors based on CuO nanowires. Sensors and Actuators B: Chemical, 2021, 335: 129701 https://doi.org/10.1016/j.snb.2021.129701
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A Nanda, V Singh, R K Jha, et al.. Growth-temperature dependent unpassivated oxygen bonds determine the gas sensing abilities of chemical vapor deposition-grown CuO thin films. ACS Applied Materials & Interfaces, 2021, 13(18): 21936–21943 https://doi.org/10.1021/acsami.1c01085
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J E Lee, C K Lim, H J Park, et al.. ZnO–CuO core–hollow cube nanostructures for highly sensitive acetone gas sensors at the ppb level. ACS Applied Materials & Interfaces, 2020, 12(31): 35688–35697 https://doi.org/10.1021/acsami.0c08593
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K C Xian, B Nie, Z G Li, et al.. TiO2 decorated porous carbonaceous network structures offer confinement, catalysis and thermal conductivity for effective hydrogen storage of LiBH4. Chemical Engineering Journal, 2021, 407: 127156 https://doi.org/10.1016/j.cej.2020.127156
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S Samadi, M Nouroozshad, S A Zakaria. ZnO@SiO2/rGO core/shell nanocomposite: a superior sensitive, selective and reproducible performance for 1-propanol gas sensor at room temperature. Materials Chemistry and Physics, 2021, 271: 124884 https://doi.org/10.1016/j.matchemphys.2021.124884
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C H Han, X W Li, C L Shao, et al.. Composition-controllable p-CuO/n-ZnO hollow nanofibers for high performance H2S detection. Sensors and Actuators B: Chemical, 2019, 285: 495–503 https://doi.org/10.1016/j.snb.2019.01.077
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Y H Navale, S T Navale, F J Stadler, et al.. Enhanced NO2 sensing aptness of ZnO nanowire/CuO nanoparticle heterostructure-based gas sensors. Ceramics International, 2019, 45(2): 1513–1522 https://doi.org/10.1016/j.ceramint.2018.10.022
