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Rare Metals

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14.11.2020 | Original Article

Ultrathin CeO₂ nanosheets as bifunctional sensing materials for humidity and formaldehyde detection

verfasst von: Peng Zhang, Le-Xi Zhang, Heng Xu, Yue Xing, Jing-Jing Chen, Li-Jian Bie

Erschienen in: Rare Metals | Ausgabe 6/2021

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Abstract

Issues like morphology control and further multifunctional applications are of significant importance for rare earth nano-oxides, e.g., cerium dioxide (CeO₂) nanostructures, however, relevant results in this respect are rather limited up to now. In the present work, ultrathin CeO₂ nanosheets were synthesized through a facile low-temperature hydrothermal method. The structure, morphology and specific surface area of these CeO₂ nanosheets were characterized by X-ray diffraction (XRD), field emission scanning electron microscope (FESEM) and N₂ adsorption–desorption. Significantly, CeO₂ nanosheets have the potential as bifunctional sensing materials to detect both humidity and formaldehyde vapor. The CeO₂ nanosheet humidity sensor exhibited excellent sensing characteristics in the relative humidity range of 11%–97% with the response value as high as 3.1 × 10⁴. Meanwhile, the CeO₂ nanosheet gas sensor showed superior sensitivity and repeatability with fast response/recovery speed toward formaldehyde vapor at 300 °C. Finally, the humidity and formaldehyde sensing mechanism were discussed as well.

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Vorheriger Artikel Sulfur dioxide sensing properties of MOF-derived ZnFe2O4 functionalized with reduced graphene oxide at room temperature

Nächster Artikel Synthesis of hollow spherical nickel oxide and its gas-sensing properties

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Titel: Ultrathin CeO2 nanosheets as bifunctional sensing materials for humidity and formaldehyde detection
verfasst von: Peng Zhang
Le-Xi Zhang
Heng Xu
Yue Xing
Jing-Jing Chen
Li-Jian Bie
Publikationsdatum: 14.11.2020
Verlag: Nonferrous Metals Society of China
Erschienen in: Rare Metals / Ausgabe 6/2021
Print ISSN: 1001-0521
Elektronische ISSN: 1867-7185
DOI: https://doi.org/10.1007/s12598-020-01619-7

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Abstract

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