三维石墨烯载金属纳米粒子的可控制备及电化学行为研究

项目名称： 三维石墨烯载金属纳米粒子的可控制备及电化学行为研究

项目编号： No.21305050

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 数理科学和化学

项目作者： 陈晓梅

作者单位： 集美大学

项目金额： 25万元

中文摘要： 以三维石墨烯为主体材料，利用纳米镍增强石墨烯的还原性，借助石墨烯载体和金属前驱体之间氧化还原电位差，通过控制一定的反应条件，实现三维石墨烯上单金属纳米粒子及双金属纳米粒子的自还原可控制备。由于制备过程中未使用稳定剂，所得到的金属纳米粒子具有"清洁"的表面，活性位点完全裸露，大大提高了纳米粒子的利用率。在研究复合材料电化学行为时，直接将三维石墨烯复合物组装成工作电极，从而解决了传统涂膜法中石墨烯易重新堆叠引起比表面降低的难题。这种工作电极最大程度地保持了三维石墨烯的高孔隙率、高比表面积和高导电性的特点，为纳米粒子和电活性物质之间的电化学反应提供了足够的反应空间。利用这种复合材料催化氧化电活性物质，如葡萄糖、双氧水等，并以此构建高灵敏的电化学生物传感器，以期实现对一些重要生命活动过程的实时在线监测。

中文关键词： 石墨烯；金属纳米粒子；电催化；生物传感器；

英文摘要： In this project, we focus on the preparation and applications of single- and bi-metallic nanoparticles on three-dimensional (3D) graphene architectures. To enhance the reduction property of 3D graphene architectures, we will modify nickel nanoparticles on 3D graphene surface. By the large potential difference between metal precursors and graphene composites, metal nanoparticles will grow spontaneous on 3D graphene architectures according to the galvanic cell effect. The as-made metal nanoparticles-3D graphene architectures is readily "clean" due to the surfactant-free formation process, which makes them express high electrocatalytic ability in further applications. In the study of the electrochemical behavior of metal nanoparticles-3D graphene architectures, we will directly fabricate it as a free-standing working electrode. Different from the conditional methods, this method will keep the excellent intrinsic properties of graphene such as high specific surface areas, strong mechanically strengths and fast electron transport kinetics as much as possible. Inspired by the attractive properties of metal nanoparticles-3D graphene architectures, we will apply it in fabrication of high sensitive electrochemical biosensors. This project will open a new way for the application of 3D graphene architectures in nano-materi

英文关键词： graphene；metal nanoparticles；electrocatalysis；biosensor；