Hydrogen sensor based on polymer-filled hollow core fiber with Pt-loaded WO3/SiO2 coating

被引：33
作者：
Xu, Ben [1 ]
Li, Ping [1 ]
Wang, D. N. [1 ]
Zhao, Chun-Liu [1 ]
Dai, Jixiang [2 ]
Yang, Minghong [2 ]
机构：
[1] China Jiliang Univ, Coll Opt & Elect Technol, Hangzhou 310018, Zhejiang, Peoples R China
[2] Wuhan Univ Technol, Natl Engn Lab Fiber Opt Sensing Technol, Wuhan 430070, Peoples R China
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 2017年 / 245卷
基金：
中国国家自然科学基金;
关键词：
Optical fiber sensor; Pt-loaded WO3/SiO2 coating; Hydrogen sensor; Fabry-Perot interferometer; Temperature; SENSING CHARACTERISTICS; WO3; FILM; INTERFEROMETER;
D O I：
10.1016/j.snb.2017.01.206
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A simple, compact and highly sensitive hydrogen sensing device based on a polymer-filled hollow core fiber coated with Pt-loaded WO3/SiO2 is demonstrated. The device is composed of a tiny segment of hollow core fiber (HCF) spliced to a standard single mode fiber (SMF) incorporated with a fiber Bragg grating (FBG). The HCF is filled with polymer and the inner air-gap near the interface between SMF and polymer forms a micro-cavity Fabry-Perot interferometer (FPI). With Pt-loaded WO3/SiO2 coating acting as the catalytic layer, hydrogen undergoes an exothermic reaction with oxygen in air and releases heat when the device is exposed to hydrogen, which induces local temperature change of FPI and hence leads to reflection spectrum shift of the proposed device. Here, the FBG is used to compensate the surrounding temperature effect and eliminate the temperature cross-sensitivity of the device. A wavelength shift of over 35 nm is obtained with a 242-mu m-long polymer-filled HCF for 4% (vol%) H-2 concentration, and the maximum sensitivity of 17.48 nm/% (vol%) H-2 is achieved within the range of 0-4.0% (Vol%) H-2 in air. The sensor device also exhibits fast response time to hydrogen. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：516 / 523
页数：8
相关论文
共 42 条
[41]   Fiber optic sensor for H2 gas detection in the presence of methane based on Pd/WO3 low-coherence interferometric structure [J].
Maciak, Erwin .
12TH CONFERENCE ON INTEGRATED OPTICS: SENSORS, SENSING STRUCTURES, AND METHODS, 2017, 10455
[42]   Ultra high-sensitive, prompt response and recovering Pt/(Pt plus SiO2) cermet layer/GaN-based hydrogen sensor for life-saving applications [J].
Bellamkonda, V. S. Santhosh N. Varma. ;
Mohan Arora, Brij ;
Pudi, Seshasainadh ;
Bhunia, Swagata ;
Laha, Apurba .
NANOTECHNOLOGY, 2020, 31 (46)
12345