4.7 Article

Comparative Study on Gas-Sensing Properties of 2D (MoS2, WS2)/PANI Nanocomposites-Based Sensor

Journal

NANOMATERIALS
Volume 12, Issue 24, Pages -

Publisher

MDPI
DOI: 10.3390/nano12244423

Keywords

transition-metal dichalcogenides; polyaniline; conducting polymer; gas sensor; nanocomposites

Funding

  1. Qatar National Research Fund [UREP 25-057-2-023]

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In this study, a new NH3 gas sensor composed of two-dimensional materials and PANI was proposed. The sensor showed high sensitivity and fast response, making it suitable for NH3 gas detection applications.
NH3 is a highly harmful gas; when inhaled at levels that are too high for comfort, it is very dangerous to human health. One of the challenging tasks in research is developing ammonia sensors that operate at room temperature. In this study, we proposed a new design of an NH3 gas sensor that was comprised of two-dimensional (TMDs, mainly WS2 and MoS2) and PANI. The 2D-TMDs metal was successfully incorporated into the PANI lattice based on the results of XRD and SEM. The elemental EDX analysis results indicated that C, N, O, W, S and Mo were found in the composite samples. The bandgap of the materials decreased due to the addition of MoS2 and WS2. We also analyzed its structural, optical and morphological properties. When compared to MoS2 and PANI, the proposed NH3 sensor with the WS2 composite was found to have high sensitivity. The composite films also exhibited response and recovery times of 10/16 and 14/16 s. Therefore, the composite PANI/2D-TMDs is a suitable material for NH3 gas detection applications.

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