Preparation and gas-sensing performances of Cr2O3-decorated ZnO nanostructures grown in a boundary layer of non-uniform thickness for low-working temperature H2S detection

[Display omitted] New insights into controlling boundary layer thickness are investigated in growth of hierarchical metal oxides on a tilted substrate. Cr2O3-decorated ZnO nanostructures with different densities and lengths were successfully synthesized by a combination of chemical and physical tech...

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Bibliographic Details
Published in:Chemical physics letters 2019-10, Vol.732, p.136648, Article 136648
Main Authors: Kamalianfar, Ahmad, Naseri, Mammoud Goodarz, Jahromi, Siamak Pilban
Format: Article
Language:English
Subjects:
Boundary layer
Cr2O3-ZnO
Hierarchical structure
Hydrogen sulfide
Sensor
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Summary:[Display omitted] New insights into controlling boundary layer thickness are investigated in growth of hierarchical metal oxides on a tilted substrate. Cr2O3-decorated ZnO nanostructures with different densities and lengths were successfully synthesized by a combination of chemical and physical techniques and investigated as a H2S sensor. By tilting the substrate relative to the incoming gas flow, a boundary layer of non-uniform thickness was created over the substrate. The sensing results of Cr2O3-ZnO hierarchical structures indicated that decoration of the Cr2O3 nano-particles on ZnO nanostructures significantly enhanced the response to H2S, Liquefied petroleum gas and ethanol at low temperature.
ISSN:0009-2614
1873-4448
DOI:10.1016/j.cplett.2019.136648