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Rare Metals
Published in: Rare Metals 6/2021

14-11-2020 | Original Article

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

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

Published in: Rare Metals | Issue 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.

Graphic abstract

previous article Sulfur dioxide sensing properties of MOF-derived ZnFe2O4 functionalized with reduced graphene oxide at room temperature
next article Synthesis of hollow spherical nickel oxide and its gas-sensing properties

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Metadata
Title
Ultrathin CeO2 nanosheets as bifunctional sensing materials for humidity and formaldehyde detection
Authors
Peng Zhang
Le-Xi Zhang
Heng Xu
Yue Xing
Jing-Jing Chen
Li-Jian Bie
Publication date
14-11-2020
Publisher
Nonferrous Metals Society of China
Published in
Rare Metals / Issue 6/2021
Print ISSN: 1001-0521
Electronic ISSN: 1867-7185
DOI
https://doi.org/10.1007/s12598-020-01619-7

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