摘要
随着全球塑料产品的生产和增加,微塑料污染问题日益受到关注,因此,对于微塑料的监测,就显得尤为重要。本文提出的以石墨烯为纳米间隔的银纳米树突/石墨烯/铜箔SERS基底,具有三维多孔的结构,有利于大分子纳米颗粒进入纳米间隙;同时,在激光激发下,这些纳米间隙间产生强大的“热点”,增加了被检测纳米颗粒的拉曼信号。因此,该SERS基底可以很好的应用于饮用水中100 nm级别聚苯乙烯微塑料的检测。我们通过控制反应时的电流的大小不变,改变反应时间来得到不同的银纳米结构,然后再对基底的灵敏度以及均匀性展开研究,不断优化制备条件,当电沉积时间为15 s时,得到了一种可以用于饮用水中聚苯乙烯微塑料检测的SERS基底,最低检测浓度可达到100μg/mL。因此,制备得到的该SERS基底可以广泛应用于食品安全等领域的SERS检测。
With the production and increase of plastic products worldwide,the problem of microplastic pollution is getting increasing attention,Thus,the monitoring of microplastics is particularly important.The silver nanodendrites/graphene/copper foil SERS substrate with graphene as the nanometer interval has a three-dimensional porous structure,which is conducive to the entry of macromolecular nanoparticles into the nanopap;Meanwhile,these nanoggaps generate strong“hot spots”under laser excitation,increasing the Raman signal of the detected nanoparticles.So,this SERS substrate can be well applied for the detection of 100-nm-grade polystyrene microplastics in drinking water.In this paper,we obtain different silver nanostructures by controlling the magnitude of the current and changing the reaction time,then,the sensitivity and uniformity of the substrate were studied,and the preparation conditions are continuously optimized,when the electrodeposition time is 15 s,obtained a SERS substrate that can be used for the detection of polystyrene microplastics in drinking water,its lowest test concentration can reach 100μg/mL.Therefore,the prepared SERS substrate can be widely used for SERS detection in fields such as food safety.
作者
申海娅
孙文喜
李新娟
邹积芳
崔清华
李玉静
郝明晶
褚肖迪
刘汉平
林晓卉
李崇辉
SHEN Haiya;SUN Wenxi;LI Xinjuan;ZOU Jifang;CUI Qinghua;LI Yujing;HAO Mingjing;CHU Xiaodi;LIU Hanping;LIN Xiaohui;LI Chonghui(Shandong Key Laboratory of Biophysics,Institute of Biophysics,Dezhou University,Dezhou Shandong 253023,China)
出处
《德州学院学报》
2024年第2期37-42,共6页
Journal of Dezhou University
基金
国家自然科学基金青年项目(12104085,52202163)
山东省自然科学基金项目(ZR2021QA008,ZR2022QE125)
山东省高等学校青年创新团队(2022KJ093,2023KJ272)
德州学院科研基金项目(2021xjrc101,2021xjrc301)
山东省大学生创新创业训练计划国家级项目(202310448039,202310448034)。
关键词
增强拉曼
三维多孔
银纳米树突
等离激元结构
微塑料检测
SERS
three dimensional porous
silver nanodendrites
plasmonic structure
microplastic detection
作者简介
申海娅(2002-),女,山东省聊城市人,本科生,主要研究方向为表面增强拉曼检测。;通信作者:李崇辉(1992-),男,副教授,凝聚态物理博士,主要研究方向为表面增强拉曼光谱。
