蒽醌基共价有机框架／氧化石墨烯复合材料的制备及其电容去离子脱盐性能-《福建理工大学学报》

文章信息/Info

Title:: Preparation of Anthraquinone Covalent Organic fr＜x＞amework/Oxide Graphene Composite and Study on Its Capacitive Deionization and Desalination Performance

摘要:: 针对传统电容去离子(CDI)电极储盐容量有限、导电性不足的问题，本文通过原位合成策略制备了蒽醌基共价有机框架/氧化石墨烯复合材料(TPDQ-COF@GO)，并将其用作混合CDI阴极。研究表明，TPDQ-COF均匀生长于GO表面，形成了抑制自团聚、促进电子传输的多孔复合结构，提升了比电容并降低了电荷转移电阻。在500 mg/L NaCl溶液中，该体系表现出较好的脱盐性能：盐吸附容量达42.8 mg/g，最大吸附速率为4.39 mg/(g·min)，50次循环后容量保持率达82.4%。上述结果表明，氧化石墨烯导电网络与蒽醌基COF氧化还原活性位点之间具有良好的协同作用，可有效提升电极材料的储盐容量和脱盐动力学性能，为高性能COF基CDI脱盐电极材料的设计提供了参考。

Abstract:: To address the limitations of traditional capacitor-type deionization (CDI) electrodes—limited salt storage capacity and insufficient conductivity—the present study fabricated an anthraquinone-ba＜x＞sed covalent organic fr＜x＞amework/ graphene oxide composite (TPDQ-COF@GO) via an in situ synthesis strategy, employing it as a hybrid CDI cathode. Research demonstrates that TPDQ-COF grows uniformly on the GO surface, forming a porous composite structure that inhibits self-aggregation and enhances electron transport, thereby improving specific capacitance and reducing charge transfer resistance. In a 500 mg/L NaCl solution, the system exhibited excellent desalination performance: a salt adsorption capacity of 42.8 mg/g, a maximum adsorption rate of 4.39 mg/(g·min), and a capacity retention rate of 82.4% after 50 cycles. These results indicate a strong synergistic effect between the graphene oxide conductive network and the anthraquinone-ba＜x＞sed COF redox active sites, effectively enhancing both the electrode’’’’’’’’s salt storage capacity and desalination kinetics, providing a reference for designing high-performance COF-ba＜x＞sed CDI desalination electrode materials.