磁性/量子点纳米复合材料的制备与电致化学发光性能  

Preparation and Electrogenerated Chemiluminescence Properties of Magnetic/Quantum Dot Nanocomposites

作　　者：李培礼 张长川 王伟烽 崔建东[1] 罗闯[1] 朱广军[1] Li Peili;Zhang Changchuan;Wang Weifeng;Cui Jiandong;Luo Chuang;Zhu Guangjun(School of Chemical Engineering,Nanjing University of Science&Technology,Nanjing,Jiangsu 210094,China)

机构地区：[1]南京理工大学化工学院

出　　处：《化学世界》2019年第10期670-675,共6页Chemical World

摘　　要：利用共沉淀法制备了磁性Fe3O4纳米粒子,多巴胺(DA)在其表面自动氧化聚合形成核/壳结构纳米粒子(Fe3O4@PDA);通过红外光谱(IR)和扫描电子显微镜(SEM)对其结构和形貌进行表征;采用水相合成法合成了CdSe量子点,并由L-半胱氨酸修饰其表面;由制备的核/壳结构纳米粒子与CdSe量子点通过静电吸引力结合在一起形成兼具有磁性和电致化学发光(ECL)的纳米复合材料。Fe^3+、Cu^2+、Cd^2+对复合材料ECL强度增强或猝灭的性质,在一定浓度范围内,离子浓度与发光强度呈线性关系,利用此性质检测这些离子的浓度,结果表明效果较好。Magnetic Fe3O4nanoparticles were prepared by the coprecipitation method,and dopamine(DA)automatically oxidized and polymerized on the surface to form nanoparticles with core/shell structure.The structure and morphology of nanoparticles were characterized by infrared spectrum(IR)and scanning eletroon microscope(SEM).CdSe quantum dots were prepared by the water phase synthesis method and modified by L-cysteine.Core/shell structure rice particles(Fe3O4@PDA)and CdSe were bonded together by electrostatic attraction to form nanocomposites with magnetic and electrogenerated chemiluminescence(ECL)performances.The properties of Fe^3+,Cu^2+and Cd2+on the strength enhancement or quenching of composite electrogenerated chemiluminescence(ECL)had a linear relationship with the luminescence intensity in a certain concentration range,and the concentrations of these ions were also detected with good effect.

关 键 词：FE3O4 CDSE量子点 纳米复合材料 电致化学发光 

分 类 号：O69[理学—化学]