摘要
首先采用热分解法制备了Fe3O4纳米材料,再将其作为磁性核,分别采用种子沉积法和种子介导生长法制备了Fe3O4-Au核-卫星纳米复合材料和Fe3O4@Au核-壳纳米复合材料,并对其形貌和性能进行了表征分析.结果表明,所制备的Fe3O4-Au核-卫星和Fe3O4@Au核-壳纳米复合材料粒径均匀,Au纳米颗粒均匀沉积/包覆在Fe3O4纳米材料表面,且样品均具有良好的磁响应性.使用4-氨基苯硫酚(4-ATP)作为拉曼探针分子,对比了这两种纳米复合材料作为SERS基底时的拉曼信号增强效果.结果显示,Fe3O4@Au核-壳纳米复合材料是更优秀的SERS基底,且该SERS基底具有良好的信号再现性.最后,使用Fe3O4@Au核-壳纳米复合材料作为SERS基底,成功地在苹果皮上检测出残留福美双的SERS信号.
Fe3O4 nanomaterial was prepared by thermal decomposition method,and then Fe3O4-Au coresatellite nanocomposites and Fe3O4@Au core-shell nanocomposites were prepared by seed deposition method and seed-mediated growth method,respectively.The morphology of the Fe3O4-Au core-satellite nanocomposites and Fe3O4@Au core-shell nanocomposites were uniform and the Au nanoparticles were uniformly deposited/coated on the surface of Fe3O4nanomaterials.The samples had good magnetic responsiveness.Using 4-aminothiophenol(4-ATP)as Raman probe molecule,the Raman signal enhancement effect of the two nanocomposites as SERS substrates was compared.The results showed that the Fe3O4@Au core-shell nanocomposite was a better SERS substrate,and had good signal reproducibility.Finally,using Fe3O4@Au core-shell nanocomposite as SERS substrate,the SERS signal of the residual thiram was detected on the apple peel successfully.
作者
韩东来
李博珣
杨硕
闫永胜
杨丽丽
刘洋
李春香
HAN Donglai;LI Boxun;YANG Shuo;YAN Yongsheng;YANG Lili;LIU Yang;LI Chunxiang(School of Chemistry & Chemical Engineering,Jiangsu University,Zhenjiang 212013,China;School of Materials Science and Engineering,Changchun University of Science and Technology,Changchun 130022,China;Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China;Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education,Jilin Normal University,Siping 136000,China)
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2019年第10期2067-2074,共8页
Chemical Journal of Chinese Universities
基金
国家自然科学基金(批准号:21676115,61705020)
中国博士后科学基金(批准号:2017M621645)
江苏省博士后基金(批准号:1701103B,1701106B)
江苏省自然科学基金(批准号:BK20180880)资助~~
