| 刘明尧,骆志杰,宋涵.一种基于离心沉积金钯核壳纳米颗粒膜的光纤H2传感器[J].光电子激光,2018,29(5):485~491 |
| 一种基于离心沉积金钯核壳纳米颗粒膜的光纤H2传感器 |
| Optical fiber hydrogen sensor based on centrifugal deposited Au-Pd core-shel l nanoparticles films |
| 投稿时间：2017-10-10 |
| DOI： |
| 中文关键词: 光纤传感器 H2传感器 Au-Pd核壳纳米颗粒 纳米粒膜 |
| 英文关键词:optical fiber sensor H2sensor Au-Pd core-shell nanoparticles nanoparticl e film |
| 基金项目:国家自然科学基金青年基金(61701358)、湖北省技术创新专项任务(对外科技合作类,2016AHB019)、中央高校基本科研业务费专项资金(2018IVB012)资助项目(武汉理工大学 机电工程学院,湖北 武汉 430070) |
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| 中文摘要: |
| 鉴于低维纳米材料的大比表面积可以极大的提高材料与气体分子的接触面积,增强 氢敏材料的灵敏度,本文提出了一种基于离心沉积金钯(Au-Pd)核壳纳米粒膜的反射式光 纤氢气传感器。实验中采用种子 溶液生长法合成尺寸约40nm的立方金核,后在金核溶液中加入Pd的 生长液,进而得到粒径约62nm的Au-Pd 核壳纳米颗粒。在4000rpm,8min条件下,将4mL纳米颗粒溶液水平 离心沉积在10 mm×10mm的石英玻璃 基片上得到氢敏纳米膜。表征分析结果显示,该方法制备的Au-Pd核壳纳米粒子粒径均 一、结晶良好,离 心沉积薄膜厚度均匀为200nm。在不同浓度氢气环境下,通过搭建的 带有双光路补偿的反射式光纤束传感 器对纳米粒薄膜的氢敏特性进行了测试。结果表明,该传感器对浓度在0.1%～4%的氢气具有较高的响应速 度,在多次通/放氢循环中表现出良好的稳定性和可重复性；随着氢气浓度的降低,传感 器的灵敏度呈非线性增大,有利于对低浓度氢气的检测。 |
| 英文摘要: |
| Low-dimensional nanomaterials are able to improve the contact area b etween the materials and the gas molecules because of the large specific surface area,which is promising to enhance the sensitivity of hydrogen sensors.In this study,a reflective optical fibe r sensor based on centrifugal deposited Au-Pd core-shell nanoparticles has been designed and fabricated.Through a seed solution growth method,the cube gold core with 40nm size was syn thesized in aqueous solution.Then,200μL Pd growth solution was added in Au core solution and reduced as 10nm thick Pd shell to obtain Au-Pd core-shell nanoparticles with the size of about 62nm.After a centrifugal deposition process at 4000rpm for 8min,4mL nanopart icle solution was deposited on a 10mm×10mm quartz glass substrate to prepare hydrogen sensitive nanoparticle f ilms with a thickness of 200nm.A reflective optical fiber bundle sensor with double-light-route c ompensation has been built to characterize the sensitivity of the film for various hydrogen concent rations.The experimental results show that the sensor has a high sensitivity to hydrogen in the concentration range of 0.1%～4%.After a curing process in the first few cycles,the sensor exhibits a good stability and repeatability in the multiple pass/vent cycles.With the decrea se of hydrogen concentration,the sensitivity of the sensor increases nonlinearly,which has a great advantage in the low concentration hydrogen detection. |
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