Room-Temperature High-Performance H2S Sensor Based on Porous CuO Nanosheets Prepared by Hydrothermal Method

Li, Zhijie, Wang, Ningning, Lin, Zhijie, Wang, Junqiang, Liu, Wei, Sun, Kai, Fu, Yong Qing and Wang, Zhiguo (2016) Room-Temperature High-Performance H2S Sensor Based on Porous CuO Nanosheets Prepared by Hydrothermal Method. ACS Applied Materials & Interfaces, 8 (32). pp. 20962-20968. ISSN 1944-8244

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Room-temperature high performance H2S sensor based on porous CuO nanosheets prepared by hydrothermal method.pdf - Accepted Version

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Official URL: http://dx.doi.org/10.1021/acsami.6b02893

Abstract

Porous CuO nanosheets were prepared on alumina tubes using a facile hydrothermal method, and their morphology, microstructure, and gas-sensing properties were investigated. The monoclinic CuO nanosheets had an average thickness of 62.5 nm and were embedded with numerous holes with diameters ranging from 5 to 17 nm. The porous CuO nanosheets were used to fabricate gas sensors to detect hydrogen sulfide (H2S) operating at room temperature. The sensor showed a good response sensitivity of 1.25 with respond/recovery times of 234 and 76 s, respectively, when tested with the H2S concentrations as low as 10 ppb. It also showed a remarkably high selectivity to the H2S, but only minor responses to other gases such as SO2, NO, NO2, H2, CO, and C2H5OH. The working principle of the porous CuO nanosheet based sensor to detect the H2S was identified to be the phase transition from semiconducting CuO to a metallic conducting CuS.

Item Type: Article
Uncontrolled Keywords: CuO; gas sensor; hydrogen sulfide; hydrothermal method; nanosheet
Subjects: F200 Materials Science
Department: Faculties > Engineering and Environment > Physics and Electrical Engineering
Depositing User: Becky Skoyles
Date Deposited: 01 Sep 2016 09:51
Last Modified: 26 Jul 2017 07:07
URI: http://nrl.northumbria.ac.uk/id/eprint/27638

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