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Abstract：
The problem of high operating temperature and high power consumption in practical detection has been existing in semiconducting CuO based gas sensors. With sensitization of noble metals, Au nanoparticles loaded CuO nanorods with different concentrations were prepared with an easy two-step method. The crystal structure, morphology, nanosize, and chemical composition of the samples were examined by XRD, FESEM, TEM, and XPS respectively. The CuO nanorod was loaded with a single gold nanoparticle with the Au-loading concentration of 2 mol%. This 2 mol% Au loaded CuO nanorod sample exhibited enhanced NO2 sensing performance, which can obtain the same peak response 4.3 to 5 ppm NO2 at a lower temperature of 100 ? as compared with that of the pure CuO nanorods at 150 ?. Meanwhile, the response/recovery speed and selectivity were also promoted. More importantly, Au loaded CuO nanorods can realize NO2 detection in room temperature (25 ?). The low-temperature sensitization mechanism with Au-loading was also investigated.
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MATERIALS LETTERS
ISSN： 0167-577X
Year： 2022
Volume： 328
3 . 0
JCR@2022
2 . 7 0 0
JCR@2023
ESI Discipline： MATERIALS SCIENCE;
ESI HC Threshold：91
JCR Journal Grade：2
CAS Journal Grade：3
Cited Count：
WoS CC Cited Count： 7
SCOPUS Cited Count：
ESI Highly Cited Papers on the List： 0 Unfold All
WanFang Cited Count：
Chinese Cited Count：
30 Days PV： 5
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