Facile synthesis and ammonia gas sensing properties of NiO nanoparticles decorated MoS2 nanosheets heterostructure
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In this paper, a nickel oxide (NiO)/molybdenum disulfide (MoS2) heterostructure was successfully synthesized by an economical hydrothermal method, and was spin-coated on a substrate with interdigitated electrode as a sensing material to construct ammonia (NH3) sensor. The surface morphology and microstructure of the NiO/MoS2 nanocomposite were inspected by various characterization means. The gas-sensing investigations demonstrated that the proposed NiO/MoS2 film sensor has outstanding sensing abilities toward ammonia gas in terms of high response, good reversibility, acceptable selectivity and swift response/recovery properties. The unique morphology and the synergistic effect of the NiO/MoS2 heterojunction contributed a lot to its enhanced gas sensing properties. The NiO/MoS2 heterostructure film sensor has promising applications for NH3 detection at room temperature.
This work was supported by the National Natural Science Foundation of China (Grant No. 51777215), the Key Research & Development Plan Project of Shandong Province (Grant No. 2018GSF117002), the Fundamental Research Funds for the Central Universities of China (Grant No. 18CX07010A), and the Open Funds of National Engineering Laboratory for Mobile Source Emission Control Technology (Grant No. NELMS2017B03), and the Open Fund of Key Laboratory of Marine Spill Oil Identification and Damage Assessment Technology, State Oceanic Administration of China (Grant No. 201801).
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