Sensitivity-enhanced optical fiber hydrogen sensor based on multilayer Au-Pd core-shell nanoparticle film

Qing-qing MU; Xiao-bo LIU; Wei LIU

doi:10.3788/OPE.20192708.1681

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Sensitivity-enhanced optical fiber hydrogen sensor based on multilayer Au-Pd core-shell nanoparticle film

Modern Applied Optics | 更新时间：2020-08-13

- Sensitivity-enhanced optical fiber hydrogen sensor based on multilayer Au-Pd core-shell nanoparticle film
- Optics and Precision Engineering Vol. 27, Issue 8, Pages: 1681-1687(2019)
- 作者机构：
  
  1.国网电力科学研究院武汉南瑞有限责任公司，湖北武汉 430074
  2.国网安徽省电力有限公司电力科学研究院六氟化硫气体特性分析与净化处理技术国网公司重点实验室，安徽合肥 230022
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20192708.1681
  CLC： TN253;TP212.14
- Received：11 December 2018，
  
  Accepted：05 February 2019，
  
  Published：15 August 2019
- 稿件说明：
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Qing-qing MU, Xiao-bo LIU, Wei LIU. Sensitivity-enhanced optical fiber hydrogen sensor based on multilayer Au-Pd core-shell nanoparticle film[J]. Optics and precision engineering, 2019, 27(8): 1681-1687.
DOI：

Qing-qing MU, Xiao-bo LIU, Wei LIU. Sensitivity-enhanced optical fiber hydrogen sensor based on multilayer Au-Pd core-shell nanoparticle film[J]. Optics and precision engineering, 2019, 27(8): 1681-1687. DOI： 10.3788/OPE.20192708.1681.

摘要

高灵敏度、快速响应的光纤氢气传感技术是未来氢气传感技术的发展方向，对保障氢能系统安全具有重要意义。针对纳米尺度的钯基氢敏材料难以与光器件耦合的问题，本文采用水相合成及离心沉积方法制备具有快速氢气响应特性的Au-Pd核壳纳米颗粒膜，搭建了含有Au-Pd核壳纳米颗粒氢敏膜阵列的透射式传感系统，实现了光信号与多层纳米颗粒膜阵列的耦合，通过提高敏感材料对光信号的调制能力增强了传感器的灵敏度。实验研究表明，本文制备的Au-Pd核壳纳米颗粒膜粒径为48 nm，Pd层厚度约为4 nm。该敏感薄膜对4%浓度氢气的响应时间小于3 s，且在循环测试中显示了良好的重复性和稳定性。通过3片薄膜阵列传感，在不影响传感器响应速度的同时将传感器灵敏度提升至最高，为单片膜的2.7倍。该研究为开发高性能光纤氢气传感器提供了重要指导。

Abstract

Optical fiber hydrogen sensing with high sensitivity and fast response is the future developmental direction in hydrogen sensing technology that will be of great importance in ensuring the safety of hydrogen energy systems. To solve the difficulty in coupling palladium-based hydrogen sensitive materials at the nanoscale to optical devices

Au-Pd core-shell nanoparticle films with rapid hydrogen response characteristics were prepared by aqueous phase synthesis and centrifugal deposition. With an array of Au-Pd core-shell nanoparticle films

a transmission sensing system was established in which optical signals could be coupled with the multilayer nanoparticle membrane array. Consequently

the sensitivity of the sensing system was enhanced by improving the modulation capacity of sensing materials to the optical signal. The experimental results show that the Au-Pd core-shell nanoparticle membrane prepared in this study has a particle size of 48 nm and a Pd layer thickness of 4 nm. The response time of the sensitive film to 4% hydrogen concentration is less than 3 s and exhibited good repeatability and stability in the cyclic test. The sensor's sensitivity is increased to a factor of 2.7 higher than that of the single film without affecting its response speed. This research can provide important guidance for the development of high-performance optical fiber hydrogen sensors.

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references

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