Intrinsically Safe Optical Fiber Hydrogen Sensor Using Pt-SiO2 Coated Long-Period Fiber Grating
Hydrogen, a promising clean energy carrier, needs safe detection due to its flammability. Conventional electrical hydrogen sensors have drawbacks like high operating temperatures, poor selectivity and ignition risks. We propose an optical sensor using long-period fiber gratings (LPGs) coated with Pt-SiO<sub>2</sub> nanomaterials. It works via catalytic reaction: H<sub>2</sub> reacts with O<sub>2</sub> on Pt nanoparticles, releasing heat that shifts LPG's resonant wavelength. Structural characterization showed porous SiO<sub>2</sub> with uniform Pt, ensuring efficiency and stability. Experiments proved it sensitively responds to 0.5-2.5% H<sub>2</sub> (max wavelength shift 7.544 nm), with fast response/recovery, good repeatability/reversibility. Logistic fitting (R<sup>2</sup> = 0.999) confirmed strong correlation. This sensor, safe, sensitive and stable, has great potential for real-time H<sub>2</sub> monitoring in critical environments.
Authors
- Xinran Wei (ORCID: https://orcid.org/0000-0001-6216-640X)
- Liang Ping Guo
- Fangzhou Mao
- Xuhui Zhang
- Wei Peng
- Junsheng Wang
Institutions
- Dalian University of Technology (CN)
- Dalian Maritime University (CN)
Publication Details
- Journal
- Nanomaterials
- Published
- 2026-01-12
- DOI
- https://doi.org/10.3390/nano16020095
- Primary Topic
- Advanced Fiber Optic Sensors
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- National Natural Science Foundation of China
- Dalian Maritime University
- Liaoning Revitalization Talents Program
- National Key Research and Development Program of China
- Fundamental Research Funds for the Central Universities