Abstract：
The synthesis of cobalt nanocrystal-graphene quantum dot-Ti3C2TX monolithic film electrode (Co-GQD-Ti3C2TX) is reported via self-assembly of Ti3C2TX nanosheets induced by protonated arginine-functionalized graphene quantum dot and subsequent reduction of cobalt (III). The resulting Co-GQD-Ti3C2TX shows good monolithic architecture, mechanical property, dispersibility and conductivity. The structure achieves excellent supercapacitor and sensing behavior. The self-charging supercapacitor produced by printing viscous Co-GQD-Ti3C2TX hydrogel on the back of flexible solar cell surface provides high specific capacitance (296 F g-1 at 1 A g-1), high-rate capacity (153 F g-1 at 20 A g-1), capacity retention (98.1% over 10,000-cycle) and energy density (29.6 W h kg-1 at 299.9 W kg-1). The electrochemical chip produced by printing Co-GQD-Ti3C2TX hydrogel on paper exhibits sensitive electrochemical response towards uric acid. The increase of uric acid between 0.01 and 800 μM causes a linear increase in differential pulse voltammetry signal with a detection limit of 0.0032 μM. The self-powered sensing platform integrating self-charging supercapacitor, electrochemical chip and micro electrochemical workstation was contentedly applied to monitoring uric acid in sweats and shows one broad application prospect in wearable electronic health monitoring device.
摘要：
报道了通过质子化的精氨酸功能化的石墨烯量子点诱导的Ti3C2TX纳米片的自组装以及随后的钴（III）还原，合成了钴纳米晶体-石墨烯量子点-Ti3C2TX单片膜电极（Co-GQD-Ti3C2TX）。所得的Co-GQD-Ti3C2TX显示出良好的单片结构，机械性能，分散性和导电性。该结构实现了优异的超级电容器和感测行为。通过在柔性太阳能电池表面的背面印刷粘性Co-GQD-Ti3C2TX水凝胶而产生的自充电超级电容器提供了高比电容（在1Ag-1时为296Fg-1），高速率容量(153Fg-1，20Ag-1)，容量保持率（在10,000次循环中为98.1%）和能量密度（299.9Wkg-1时为29.6Whkg-1）。通过在纸上印刷Co-GQD-Ti3C2TX水凝胶生产的电化学芯片对尿酸表现出灵敏的电化学响应。尿酸在0.01至800μM之间的增加导致差分脉冲伏安信号的线性增加，检测限为0.0032μM。集成自充电超级电容器的自供电传感平台，电化学芯片和微型电化学工作站满足于汗液中尿酸的监测，在可穿戴式电子健康监测设备中显示出广阔的应用前景。
