无支撑柔性夹心型石墨烯复合纸电极的构筑及其电化学传感研究

项目名称： 无支撑柔性夹心型石墨烯复合纸电极的构筑及其电化学传感研究

项目编号： No.21305048

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： 肖菲

作者单位： 华中科技大学

项目金额： 25万元

中文摘要： 新型电化学传感器的快速发展推动各种新式修饰电极不断涌现。本课题提出以石墨烯复合纸作为无支撑柔性电极，以生物标志物过氧化氢为分析目标，构建电化学传感平台的全新思路：拟开发分子水平上石墨烯纳米片层表面修饰方法，通过离子液体对石墨烯修饰提高石墨烯材料的可溶液操作性和成膜性；以修饰化石墨烯纳米片层为结构单元组装无支撑石墨烯纸宏观结构；发展纳米尺度下石墨烯纸与其它功能材料复合的绿色可控制备技术，采用超声电沉积法和界面自组装法将纳米电催化材料负载到石墨烯薄膜上，构筑高级有序夹心型纳米电催化剂/离子液体/石墨烯复合纸。设计"功能导向-结构调控-性能优化"研究体系，阐明复合材料各层次组分的形成机制、相互作用和构效关系，通过各组分间的协同效应提高石墨烯复合纸电极对过氧化氢的无酶催化和电化学传感性能，制备具有普适意义的高性能纸质电极，为构建轻质柔性电化学传感器提供创新的方法，为研发新型柔性器件奠定坚实的基础。

中文关键词： 无支撑纸电极；柔性；夹心型；石墨烯纳米复合物；电化学传感

英文摘要： The development of new types of modified electrodes has triggered significant research efforts due to the rising progress of modern electrochemical sensor. We propose the design of a novel free-standing flexible electrode based on graphene nanohybrid paper and explore its use for electrochemical sensing of biomarker hydrogen peroxide: The ordered sandwich-structured nano- electrocatalysts/ionic liquid/graphene hybrid paper will be fabricated by functionalizing graphene nanosheets with ionic liquids to form macroscopic paper-like structure, which will enhance the solution processability and film-forming ability of graphene materials; And then modifying the graphene paper with nano-electrocatalysts via ultrasonic-electrodeposition and interfacial self-assembly methods to improve its nonenzymatic catalytic activity and electrochemical sensing performance toward hydrogen peroxide. The modular nature of this approach for designing flexible working electrode of electrochemical sensor in the framework of "function orientation-structure tuning-performance optimization" opens new possibilities to systematically study the formation mechanism, interaction and structure-properties relationship of different component in the graphene nanocomposite. We envision that this proposal will provide new insights on the fabrication of

英文关键词： Free-standing paper electrode；Flexible；Sandwich structural；Graphene nanocomposite；Electrochemical sensing