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Ni-doped (MoO3/MoS2) heterostructure chemiresistive sensor for dual selective detection of NH3 and NOx at room temperature.

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Title: Ni-doped (MoO3/MoS2) heterostructure chemiresistive sensor for dual selective detection of NH3 and NOx at room temperature.
Authors: Muthumalai, K.1,2 (AUTHOR), Manoharan, Mathankumar1 (AUTHOR), Govindharaj, Kamaraj1 (AUTHOR), Saravanan, Poovarasan1 (AUTHOR), Haldorai, Yuvaraj3,4 (AUTHOR), Sofer, Zdeněk2 (AUTHOR), Rajendra Kumar, Ramasamy Thangavelu1 (AUTHOR) rtrkumar@buc.edu.in
Source: Ceramics International. Jan2025, Vol. 51 Issue 1, p1017-1024. 8p.
Subjects: Field emission electron microscopy, X-ray photoelectron spectroscopy, Gas detectors, Transmission electron microscopy, Transition metals
Abstract: The transition metal dichalcogenide heterostructures are emerging as promising candidates for room-temperature gas sensors. This work presents a Ni-doped (MoO 3 /MoS 2) heterostructure, synthesized via hydrothermal methods with varying Ni concentrations, for the dual selective detection of NH 3 and NO x gases. The electronic sensitization of Ni improves the sensitivity of heterostructure. The heterostructure was characterized by using X-ray diffractometer, field emission scanning electron microscopy (FESEM), and transmission electron microscopy (TEM), with Ni incorporation confirmed by X-ray photoelectron spectroscopy (XPS). The 10 % Ni-doped MoO 3 /MoS 2 heterostructure showed high sensitivity, achieving responses of 15 % and 18.3 % towards 10 ppm NH 3 and NO x , respectively, with detection limits of 0.13 ppm and 0.11 ppm. Furthermore, the sensor demonstrated outstanding cyclic stability, device-to-device reproducibility, and long-term stability, with a retained response of 98.1 % and 98.5 % towards NH 3 and NO x , respectively. These findings highlight the potential of Ni-doped (MoO 3 /MoS 2) heterostructures for dual gas sensing applications at room temperature. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:The transition metal dichalcogenide heterostructures are emerging as promising candidates for room-temperature gas sensors. This work presents a Ni-doped (MoO 3 /MoS 2) heterostructure, synthesized via hydrothermal methods with varying Ni concentrations, for the dual selective detection of NH 3 and NO x gases. The electronic sensitization of Ni improves the sensitivity of heterostructure. The heterostructure was characterized by using X-ray diffractometer, field emission scanning electron microscopy (FESEM), and transmission electron microscopy (TEM), with Ni incorporation confirmed by X-ray photoelectron spectroscopy (XPS). The 10 % Ni-doped MoO 3 /MoS 2 heterostructure showed high sensitivity, achieving responses of 15 % and 18.3 % towards 10 ppm NH 3 and NO x , respectively, with detection limits of 0.13 ppm and 0.11 ppm. Furthermore, the sensor demonstrated outstanding cyclic stability, device-to-device reproducibility, and long-term stability, with a retained response of 98.1 % and 98.5 % towards NH 3 and NO x , respectively. These findings highlight the potential of Ni-doped (MoO 3 /MoS 2) heterostructures for dual gas sensing applications at room temperature. [ABSTRACT FROM AUTHOR]
ISSN:02728842
DOI:10.1016/j.ceramint.2024.11.084