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High-sensitivity optical fiber hydrogen sensing with MoO3/PANI/Pd nanocomposite


Citation

Alkhabet, Mohammed M. and Girei, Saad H. and Farhan, Ammar H. and Hashim, Fatimah F. and Jaafar, Jaafar A. and Salih, Husam K. and Abbood, Manar F. and Yaacob, Mohd H. (2025) High-sensitivity optical fiber hydrogen sensing with MoO3/PANI/Pd nanocomposite. Materials Science in Semiconductor Processing, 200. art. no. 110021. pp. 1-15. ISSN 1369-8001

Abstract

Hydrogen gas (H2) is increasingly used in clean energy and industrial sectors, but its high flammability necessitates sensitive and reliable detection systems. This study presents a tapered optical fiber hydrogen sensor coated with a MoO3/PANI/Pd nanocomposite, aiming to improve sensitivity, selectivity, and stability under room temperature. The nanocomposite was synthesized and characterized using FESEM, EDX, XRD, and AFM, confirming high surface roughness and uniform nanoparticle dispersion beneficial for gas adsorption. The sensor demonstrated high sensitivity (16.81/vol%), rapid response (90 s), and stable operation over one month with minimal drift, outperforming traditional sensors and MoO3 or MoO3/PANI-based configurations. Selectivity tests showed a significantly higher response to hydrogen compared to NH3 and CH4, confirming strong interference immunity. These results indicate the MoO3/PANI/Pd-coated tapered fiber sensor is a promising, scalable, and energy-efficient candidate for real-time hydrogen leak detection in industrial safety applications.


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Additional Metadata

Item Type: Article
Subject: Materials Science (all)
Subject: Condensed Matter Physics
Divisions: Faculty of Engineering
DOI Number: https://doi.org/10.1016/j.mssp.2025.110021
Publisher: Elsevier
Keywords: Gas sensing; Hydrogen (H2); MoO3/PANI/Pd and evanescent wave; Nanocomposite; Tapered fiber
Depositing User: Ms. Zaimah Saiful Yazan
Date Deposited: 02 Mar 2026 07:38
Last Modified: 02 Mar 2026 07:38
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1016/j.mssp.2025.110021
URI: http://psasir.upm.edu.my/id/eprint/122456
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