Synthesis of actinomorphic flower-like SnO2 nanorods decorated with CuO nanoparticles and their improved isopropanol sensing properties

[Display omitted] •Actinomorphic flower-like CuO/SnO2 nanorods were prepared by two-step method.•The CuO/SnO2 based sensor exhibit excellent isopropanol sensing performance.•The enhancement of sensing properties are relate to p-CuO/n-SnO2 heterojunction. Actinomorphic flower-like SnO2 nanorods (NRs)...

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Bibliographic Details
Published in:Applied surface science 2018-10, Vol.456, p.586-593
Main Authors: Zhang, Bowen, Fu, Wuyou, Meng, Xianwei, A, Ruan, Su, Pengyu, Yang, Haibin
Format: Article
Language:English
Subjects:
Actinomorphic flower-like structure
CuO/SnO2
Gas sensor
Isopropanol
Nanocomposites
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Summary:[Display omitted] •Actinomorphic flower-like CuO/SnO2 nanorods were prepared by two-step method.•The CuO/SnO2 based sensor exhibit excellent isopropanol sensing performance.•The enhancement of sensing properties are relate to p-CuO/n-SnO2 heterojunction. Actinomorphic flower-like SnO2 nanorods (NRs) were synthesized and then decorated by CuO nanoparticles (NPs) with diameter of 25 nm through a modified two-step process. The length and diameter of SnO2 NRs are about 0.4–1.8 μm and 60–200 nm, respectively. The gas-sensing testing results indicate that such unique CuO/SnO2 nanostructures exhibit an observably improved isopropanol sensing properties compared to the pure SnO2 NRs. The sensitivity of CuO/SnO2 sensor to 100 ppm isopropanol is 50.4, which is two time higher than that of the pure SnO2 sensor (22.1). The gas sensing mechanism may be related to p-CuO/n-SnO2 heterojunction formed at the interface of two oxides materials.
ISSN:0169-4332
1873-5584
DOI:10.1016/j.apsusc.2018.06.150