Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 258, Issue -, Pages 895-905Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2017.11.168
Keywords
Polyaniline; Carbon nanotube; Molybdenum disulfide; Ammonia gas; Sensing properties
Funding
- National Natural Science Foundation of China [51777215, 51407200, 51405257]
- Fundamental Research Funds for the Central Universities of China [15CX05041A]
- Science and Technology Development Plan Project of Qingdao [16-6-2-53-nsh]
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This paper reports a high-performance room-temperature ammonia gas sensor based on polyaniline/multi-walled carbon nanotubes/molybdenum disulfide (PANI/MWCNTs/MoS2) ternary nanocomposite prepared via in-situ chemical oxidative polymerization method. The component, morphology, crystallinity, and chemical state of PANI/MWCNTs/MoS2 sample was fully inspected by X-ray diffraction (XRD), fourier transform infrared spectrometer (FT-IR), scanning electron microscope (SEM), energy dispersive spectrometer (EDS), X-ray photoelectron spectroscopy (XPS) and transmission electron microscope (TEM), confirming its successful fabrication and reasonability. The ammonia sensing properties of PANI/MWCNTs/MoS2 nanocomposite were investigated at room temperature. The experimental results exhibited excellent properties in terms of high response, fast response/recovery time as well as outstanding repeatability, which were greatly superior to the pure PANI, PANI/MWCNTs and PANI/MoS2 film counterparts. Finally, the potential ammonia-sensing mechanism of the PANI/MWCNTs/MoS2 nanocomposite was systematically discussed, which is attributed to the synergistic effect of the ternary nanomaterials and special interactions at p-n heterojunction. (C) 2017 Elsevier B.V. All rights reserved.
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