Dai Jixiang, Li Yi, Ruan Hongbo, Ye Zhuang, Chai Nianyao, Wang Xuewen, Qiu Shuchang, Bai Wei, Yang Minghong
National Engineering Laboratory for Fiber Optic Sensing Technology, Wuhan University of Technology, Wuhan 430070, China.
Foshan Xianhu Laboratory of the Advanced Energy Science and Technology, Guangdong Laboratory, Foshan 528216, China.
Nanomaterials (Basel). 2021 Jan 8;11(1):128. doi: 10.3390/nano11010128.
In this paper, WO-PdPt-Pt nanocomposite films were deposited on a single mode fiber as the hydrogen sensing material, which changes its reflectivity under different hydrogen concentration. The reflectivity variation was probed and converted to an electric signal by a pair of balanced InGaAs photoelectric detectors. In addition, the performance of the WO-PdPt-Pt composite film was investigated under different optical powers, and the irrigating power was optimized at 5 mW. With the irrigation of this optical power, the hydrogen sensitive film exhibits quick response toward 100 ppm hydrogen in air atmosphere at a room temperature of 25 °C. The experimental results demonstrate a high resolution at 5 parts per million (ppm) within a wide range from 100 to 5000 ppm in air. This simple and compact sensing system can detect hydrogen concentrations far below the explosion limit and provide early alert for hydrogen leakage, showing great potential in hydrogen-related applications.
在本文中，WO-PdPt-Pt纳米复合薄膜被沉积在单模光纤上作为氢传感材料，该材料在不同氢浓度下会改变其反射率。反射率变化由一对平衡的铟镓砷光电探测器进行探测并转换为电信号。此外，研究了WO-PdPt-Pt复合薄膜在不同光功率下的性能，并将注入功率优化为5 mW。在该光功率注入下，氢敏薄膜在25℃室温的空气气氛中对100 ppm氢气表现出快速响应。实验结果表明，在空气中100至5000 ppm的宽范围内，分辨率高达百万分之五（ppm）。这种简单紧凑的传感系统能够检测远低于爆炸极限的氢浓度，并为氢气泄漏提供早期警报，在与氢相关的应用中显示出巨大潜力。
