Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 287, Issue -, Pages 346-355Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2019.02.008
Keywords
CuO/MoS2 composite; H2S gas sensor; Room temperature; Layer-by-layer self-assembly
Funding
- National Natural Science Foundation of China [51777215]
- Key Research & Development Plan Project of Shandong Province [2018GSF117002]
- Fundamental Research Funds for the Central Universities of China [18CX07010A]
- National Engineering Laboratory for Mobile Source Emission Control Technology [NELMS2017B03]
- Key Laboratory of Marine Spill Oil Identification and Damage Assessment Technology, State Oceanic Administration of China [201801]
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A high-performance hydrogen sulfide (H2S) gas sensor based on copper oxide (CuO)/molybdenum disulfide (MoS2) nanohybrid was demonstrated in this paper. A facile one-step hydrohermal method was used to synthesize CuO nanorods and MoS2 nanosheets. The CuO/MoS2 film sensor was developed on a substrate through layer-by-layer (LbL) self-assembly technique. The morphology, microstructure, and elementary composition of the as-prepared samples were inspected by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and transmission electron microscope (TEM). The gas-sensing performance of the CuO/MoS2 sensor was fully measured at room temperature of 25 degrees C. As the experimental results shown, the CuO/MoS2 sensor achieved high response, short response/recovery time, outstanding repeatability, excellent selectivity, and steady long-term stability for H2S detection. The enhanced H2S sensing performance of the CuO/MoS2 sensor was given the credit to the synergistic effect of binary nanostructure and modulation of charge transfer by the heterojunction.
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