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使用非接触式,近红外响应的凝功能化的光纤传感器对Pb²⁺进行高度敏感的检测

Yuanyuan Ren¹, Wenlong Yang¹, Zhengzheng Tan¹

¹Heilongjiang Province Key Laboratory of Laser Spectroscopy Technology and Application, Harbin University of Science and Technology, Harbin 150080, China; School of Measurement and Communication Engineering, Harbin University of Science and Technology, Harbin 150080, China.

Journal of hazardous materials

|October 30, 2024

概括

一种使用近红外光的新型水凝感应膜提供了非破坏性的,绿色的离子 (Pb2+) 检测. 这种自愈传感器避免了酸性损伤,确保了环境安全和高效的分析.

科学领域:

材料科学材料科学材料科学
分析化学分析化学
环境科学环境科学

背景情况:

传统的离子 (Pb2+) 传感器通常使用酸性化剂,从而检测到膜降解和环境问题.
开发非破坏性和环保的重金属检测方法至关重要.

研究的目的:

开发一种近红外响应的水凝感应膜,用于选择性和非破坏性测定离子 (Pb2+).
创建一种绿色和高效的Pb2+检测方法,克服现有技术的局限性.

主要方法:

通过自由基聚合制造制造Poly ((N-isopropylacrylamide) /Polyvinyl Alcohol/Graphene Oxide (PNIPAm/PVA/GO) 的水凝感应膜.
用水凝膜对U形光纤传感器进行修改,用于Pb2+检测.
利用石墨烯氧化物 (GO) 的光热效应和PNIPAm的温度反应进行非破坏性脱落.
卷积神经网络 (CNN) 的应用用于信号分析,以使不同pH水平的检测成为可能.

主要成果:

开发的传感器表现出高灵敏度 (0.2191nm/ppb) 和低检测极限 (0.27ppb) 的Pb2+在0-100ppb范围内.
水凝膜表现出很好的可重现性,稳定性和Pb2+检测的选择性.
这种"自我愈合"的特性使得它能够进行非破坏性脱吸,防止二次污染.
基于CNN的信号分析成功地解决了选择性和脱吸方面的挑战,允许在不同的pH值下测量Pb2+.

结论:

PNIPAm/PVA/GO水凝感应膜为Pb2+检测提供了一种绿色,干净和高效的方法.
光热特性和自我修复能力的结合为非破坏性传感提供了一个新的解决方案.
在复杂的环境条件下,CNN的集成增强了传感器的稳定性和适用性.

关键词:

离子检测检测器离子检测接近红外的响应光纤传感器是一种光纤传感器.光热转换的光热转换方式热敏水凝是一种热敏水凝.

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