ORIGINAL RESEARCH article
Front. Nanotechnol.
Sec. Nanomaterials
Volume 7 - 2025 | doi: 10.3389/fnano.2025.1623625
Highly Sensitive and Fast-Responsive Room Temperature LPG Sensor Based on Hydrothermally Synthesized MoTe₂
Provisionally accepted
- 1Department of Physics, Veer Bahadur Singh Purvanchal University, Jaunpur, India
- 2Department of Mechanical Engineering, Veer Bahadur Singh Purvanchal University, Jaunpur, India
- 3Babasaheb Bhimrao Ambedkar University, Lucknow, India
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In the current study, highly efficient and affordable sensor for LPG gas that operates at ambient temperature was fabricated utilizing a thin film by an easy and low-cost approach. For achieving this objective, MoTe2 was synthesized using hydrothermal method. The synthesized material was characterised by powder X-ray diffraction (PXRD), Raman spectroscopy, Fourier transform infrared (FTIR) spectroscopy, Field-emission scanning electron microscopy (FE-SEM), and Energy-dispersive X-ray spectroscopy (EDS). According to the results of PXRD and Raman spectroscopy, a pure phase of layered MoTe2 with hexagonal structure without any notable impurities was formed. The average crystallite size of synthesized material is ~ 37 nm.Raman and FTIR analysis revealed the presence of Mo-Te vibrational modes. The surface morphology reveals thin, wrinkled sheets with a crumpled topology having flake-like structures. The coexistence of Mo and Te elements was confirmed by the EDS study. The optimized sample was used to prepare the thin film utilizing a spin coating process. The sensing properties of MoTe₂ based thin film was investigated as a room-ambient sensor for various LPG concentrations below the lower explosive limit of 0.5 to 2.0 vol.%. The best sensor response were recorded at 2.0 vol.% LPG, with values of 137, and 26 for 0.5 vol.% LPG. Moreover, the rapid response time of 8 seconds and recovery times of 22 seconds were observed at 0.5 vol.% of LPG.
Keywords: LPG sensor, Thin-films, Hydrothermal method, Transition metal dichalcogenides, Sensor performance
Received: 06 May 2025; Accepted: 17 Jul 2025.
Copyright: © 2025 Singh, Kumar, Chaurasiya, Rani, Gupta, Yadav and Singh. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Manish Pratap Singh, Department of Physics, Veer Bahadur Singh Purvanchal University, Jaunpur, India
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