title: Room-Temperature High-Performance H2S Sensor Based on Porous CuO Nanosheets Prepared by Hydrothermal Method.
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.
authors.affiliation: School of Physical Electronics, University of Electronic Science and Technology of China , Chengdu 610054, People's Republic of China.
authors.forename: Zhijie
authors.initials: Z
authors.lastname: Li
authors.affiliation: School of Physical Electronics, University of Electronic Science and Technology of China , Chengdu 610054, People's Republic of China.
authors.forename: Ningning
authors.initials: N
authors.lastname: Wang
authors.affiliation: School of Physical Electronics, University of Electronic Science and Technology of China , Chengdu 610054, People's Republic of China.
authors.forename: Zhijie
authors.initials: Z
authors.lastname: Lin
authors.affiliation: School of Physical Electronics, University of Electronic Science and Technology of China , Chengdu 610054, People's Republic of China.
authors.forename: Junqiang
authors.initials: J
authors.lastname: Wang
authors.affiliation: School of Physical Electronics, University of Electronic Science and Technology of China , Chengdu 610054, People's Republic of China.
authors.forename: Wei
authors.initials: W
authors.lastname: Liu
authors.affiliation: Department of Nuclear Engineering and Radiological Sciences, University of Michigan , Ann Arbor, Michigan 48109-2104, United States.
authors.forename: Kai
authors.initials: K
authors.lastname: Sun
authors.affiliation: School of Physical Electronics, University of Electronic Science and Technology of China , Chengdu 610054, People's Republic of China.|Faculty of Engineering and Environment, Northumbria University , Newcastle upon Tyne NE1 8ST, United Kingdom.
authors.forename: Yong Qing
authors.initials: YQ
authors.lastname: Fu
authors.affiliation: School of Physical Electronics, University of Electronic Science and Technology of China , Chengdu 610054, People's Republic of China.
authors.forename: Zhiguo
authors.initials: Z
authors.lastname: Wang
keywords: CuO; gas sensor; hydrogen sulfide; hydrothermal method; nanosheet