Highly sensitive fiber grating hydrogen sensor based on hydrogen-doped Pt/WO3

被引：18

作者：

Wang, Chaoqin ^{[1
]}

Han, Zewen ^{[1
]}

Wang, Chenxiang ^{[1
]}

Peng, Gang-Ding ^{[2
]}

Rao, Yun-Jiang ^{[1
]}

Gong, Yuan ^{[1
]}

机构：

[1] Univ Elect Sci & Technol China, Key Lab Opt Fiber Sensing & Commun, Minist Educ China, Chengdu 611731, Peoples R China

[2] Univ New South Wales, Sch Elect Engn & Telecommun, Photon & Opt Commun, Sydney, NSW 2052, Australia

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2024年 / 404卷

基金：

中国国家自然科学基金;

关键词：

Optical fiber sensors; Hydrogen sensor; Gas sensor; Fiber Bragg grating; TUNGSTEN-OXIDE; OPTICAL-PROPERTIES; O-2; EVOLUTION; WO3; TEMPERATURE; PERFORMANCE; FBG;

D O I：

10.1016/j.snb.2023.135250

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Hydrogen sensors are key to the emerging clean hydrogen economies and fiber-optic hydrogen sensors play a unique role owing to their inherent safety and high sensitivity. Currently Pt/WO3 has been employed as the mainstream hydrogen-sensitive material in high performance hydrogen sensors. Here we develop an ultrasensitive fiber-optic hydrogen sensor with fast response by coating pretreated Pt/WO3 nanomaterial on fiber Bragg grating. We observe a great enhancement in sensitivity by the hydrogen-doping of the Pt/WO3 nanomaterials. The generation of HxWO3 composite material is confirmed by XRD, FTIR and Raman analysis. Compared with pure Pt/WO3, a 184-fold improvement in sensitivity is achieved by hydrogen doping, with a fast response of 25 s. An impressive limit of detection (LOD) of 30 ppm is demonstrated by employing both the narrowband weak FBGs and the hydrogen-doped Pt/WO3. The immunity to ambient temperature fluctuation is demonstrated by selfcalibration through detecting the wavelength difference between a pair of FBGs. Good specificity is also demonstrated. This technology shows great potential in high spatial-resolution quasi-distributed hydrogen sensing.

引用

页数：8

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