传感技术学报2025，Vol.38Issue(12)：2142-2147,6.DOI:10.3969/j.issn.1004-1699.2025.12.005
基于WO3-PdPt-Pt纳米复合薄膜光纤氢气传感系统性能研究
Study on the Performance of Optical Fiber Hydrogen Sensing System Based on WO3-PdPt-Pt Nanocomposite Film
摘要
Abstract
As a clean and efficient energy carrier,hydrogen has a flammable and explosive nature,which makes its leakage prone to cau-sing safety accidents.Therefore,it is crucial to reliably detect hydrogen leaks with hydrogen sensors.Commercial electrochemical hydrogen sensors have the problems of high operating temperature requirements and potential electric spark generation,while some fiber optic hydro-gen sensors also face limitations including insufficient sensitivity,slow response rate and high cost.To address these issues,a fiber optic hydrogen sensing system based on a WO3-PdPt-Pt nanocomposite film is proposed.The sensing probe is fabricated by first preparing a 120 nm WO3 thin film on the end face of a single-mode fiber via vacuum evaporation,and then followed by depositing a 30 nm PdPt com-posite film and a 5 nm Pt layer as the catalytic layer through magnetron sputtering.The system employs InGaAs photodetectors as photoe-lectric conversion element,which can avoid utilizing optical spectrometers,resulting in a significant reduction in costs of sensing system.Under irrigating power of 4 mW,this system can display quick response rate of 0.43 s towards 4 000×10-6 hydrogen.Resolution of this sensing system can reach to 1×10-6 when hydrogen concentration is below 100×10-6.In addition,detection limit as low as 5×10-6 in air can be achieved by using this sensing system.Moreover,it exhibits good repeatability during hydrogen exposure process.This sensing sys-tem can provide a safe,economical and efficient technical solution for hydrogen leakage detection in hydrogen energy sites.关键词
光纤传感/WO3-PdPt-Pt纳米复合膜/氢气泄漏检测/低检测下限/快速响应Key words
optical fiber sensing/WO3-PdPt-Pt nanocomposite film/hydrogen leakage detection/low detection limit/rapid response分类
信息技术与安全科学引用本文复制引用
吴宙洋,杨润东,汤桢干,胡文彬,代吉祥,杨明红..基于WO3-PdPt-Pt纳米复合薄膜光纤氢气传感系统性能研究[J].传感技术学报,2025,38(12):2142-2147,6.基金项目
国家自然科学基金区域联合基金项目(U23A20374) （U23A20374）
国家自然科学杰出青年基金项目(62025505) （62025505）
