油中溶解丙酮的银纳米线-金纳米星SERS检测  

Silver Nanowire-Gold Plasmonic Nanostars SERS Detection of Dissolved Acetone in Oil

作　　者：罗文萱 万福 LUO Wen-xuan;WAN Fu(North China Electric Power University(Baoding),Baoding 071003,China;State Key Laboratory of Power Transmission Equipment Technology,School of Electrical Engineering,Chongqing University,Chongqing 400044,China)

机构地区：[1]华北电力大学(保定),河北保定071003 [2]输变电装备技术全国重点实验室(重庆大学电气工程学院),重庆400044

出　　处：《光谱学与光谱分析》2024年第12期3473-3479,共7页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(51977017);重庆市自然科学基金项目(cstc2021jcyj msxmX0617)资助。

摘　　要：油纸绝缘设备是电力系统中的关键设备之一,准确掌握电气设备油纸绝缘老化状态,是保证电网安全生产的重要因素之一。丙酮是绝缘纸老化的重要指标,快速、灵敏、准确地测定绝缘油中溶解丙酮含量,对评估油-纸绝缘系统的老化具有重要意义。通过离子溅射法成功在硅-金(Si-Au)膜表面制备了银纳米线(AgNWs)-金纳米星(AuNSts)表面增强拉曼散射(SERS)基底,并将其用于快速评估绝缘油中丙酮的含量。根据扫描电子显微镜显示的基底进行形貌表征表明:在比表面积较大的AgNWs表面溅射小尺寸的金纳米颗粒,形成的双金属星环绕结构既可以有效提高表面等离激元共振,又可以为AgNWs提供了一层保护屏障,使得基底整体的抗氧化性能显著增加。SERS检测结果表明:相较于Si-Au,Si-Au-AgNWs,Si-AgNWs-AuNSts基底,Si-Au-AgNWs-AuNSts的SERS性能更优异,采用水(H2O)萃取后,绝缘油中溶解丙酮的最低检测限为40 mg·L^(-1)。且基底具有较高的一致性和稳定性,RSD值为4.87%,30 d后目标峰信号仅仅衰减了6.14%。该方法为实现油中溶解丙酮高可靠现场检测提供了一种有效途径。Oil-paper insulation equipment is one of the key components in power systems,and accurately assessing the aging status of electrical equipment's oil-paper insulation is crucial for ensuring the safety of power grids.Acetone is an important indicator of the aging process of insulation paper,and the rapid,sensitive,and accurate determination of acetone content dissolved in insulation oil is of significant importance in evaluating the aging of oil-paper insulation systems.In this study,a surface-enhanced Raman scattering(SERS)substrate based on silver nanowires(AgNWs)decorated with gold nanostars(AuNSts)was successfully prepared on a silicon-gold(Si-Au)film surface using the ion sputtering method.This substrate was utilized for rapid assessment of acetone content in insulation oil.Morphological characterization of the substrate by scanning electron microscopy revealed that the dual-metal satellite-surrounded structure formed by smaller gold nanoparticles sputtered onto the larger surface area of AgNWs not only effectively enhanced surface plasmon resonance but also provided a protective barrier layer for AgNWs,significantly improving the overall antioxidant performance of the substrate.SERS detection results showed that compared to Si-Au,Si-Au-AgNWs,and Si-AgNWs-AgNts substrates,the Si-Au-AgNWs-AuNSts substrate exhibited superior SERS performance,with the lowest detection limit of 40 mg·L^(-1) for acetone dissolved in insulation oil after water(H2O)extraction.Moreover,the substrate demonstrated high consistency and stability,with an RSD value of 4.87%,and after 30 days,the target peak signal only decreased by 6.14%.This method provides an effective approach for achieving reliable on-site detection of acetone dissolved in oil.

关 键 词：银纳米线 金纳米星 丙酮 绝缘油 SERS 

分 类 号：TM07[电气工程—电工理论与新技术]