School of Chemistry, Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, Beihang University , Beijing 100191, China.
School of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry of Ministry of Education, Nankai University , Tianjin 300071, China.
ACS Appl Mater Interfaces. 2017 Jun 28;9(25):21298-21306. doi: 10.1021/acsami.7b05318. Epub 2017 Jun 16.
Currently, the energy crisis and environmental pollution are two critical challenges confronted by humans. The development of smart strategies to address the above-mentioned issues simultaneously is significant. As the main accomplices for water pollution, several kinds of organic dyes with intrinsic redox functional groups such as phenothiazines derivatives, anthraquinone, and indigoid dyes are potential candidates for the replacement of the conventional pseudocapacitive materials. In this work, three typical organic dyes can be efficiently removed by a facile adsorption procedure using reduced graphene oxide coated cellulose fiber (rGO@CF) paper. Flexible supercapacitors based on dye/rGO@CF electrodes exhibit excellent electrochemical performances that are superior to or comparable with those of conventional pseudocapacitive materials based devices, presenting a new type of promising electrode materials. Moreover, benefiting from the high flexibility and considerable mechanical strength of the graphene composite paper, the operating potential and capacitance of the devices can be easily adjusted by tailoring the hybrid electrodes into different specific shapes followed by rational integrating. The smart design of these dye/rGO@CF paper based electrodes shows that energy storage and environmental remediation can be achieved simultaneously.
目前，能源危机和环境污染是人类面临的两大严峻挑战。开发同时解决上述问题的智能策略意义重大。作为水污染的主要元凶，一些具有内在氧化还原官能团的有机染料，如吩噻嗪衍生物、蒽醌和靛蓝染料，是替代传统赝电容材料的潜在候选材料。在这项工作中，通过使用还原氧化石墨烯包覆纤维素纤维（rGO@CF）纸的简便吸附程序，可以有效地去除三种典型的有机染料。基于染料/rGO@CF 电极的柔性超级电容器表现出优异的电化学性能，优于或可与基于传统赝电容材料的器件相媲美，为一种新型的有前途的电极材料。此外，得益于石墨烯复合纸的高柔韧性和相当大的机械强度，通过将混合电极制成不同的特定形状并进行合理集成，可以轻松调整器件的工作电位和电容。这些基于染料/rGO@CF 纸的电极的智能设计表明，储能和环境修复可以同时实现。
