材料科学
碳纳米管
共价键
涂层
活性氧
化学工程
吸附
共价有机骨架
光催化
纳米技术
光化学
催化作用
有机化学
复合材料
化学
多孔性
工程类
生物化学
作者
Xiaojun Lin,Meng Zhang,Wenxin Lv,Jing Li,Rong Huang,Yi Wang
标识
DOI:10.1002/adfm.202310845
摘要
Abstract Enhancing the covalent organic framework (COF)’s photocatalytic ability synergistically with gelling formulations remains an urgent challenge for extended bio‐applications. Herein, COF is homogeneously coated on an oxidized carbon nanotube (OCNT) and coordinated by Fe 3+ to obtain tubular nanocomplex OCNT@COF‐Fe (O@CF). The results showed that the photodynamic reactive oxygen species (ROS) generation ability of O@CF is enhanced due to the wrapped OCNT and the coordinated Fe 3+ , which can respectively serve as intermolecular charge transfer channel and electron acceptors/substrates (O 2 and H 2 O) adsorbent to narrow the energy band gaps, increase the light absorption, and decrease the photogenerated carrier recombination. Synergistically, O@CF exhibited pH‐dependent peroxidase and catalase activities, which further enhanced ROS generation and relieved hypoxia, respectively. Meanwhile, O@CF possessed degradation of COF coatings‐dependent photothermal performances. Then, O@CF is evenly incorporated into Schiff base hydrogel via the COF coating‐participated covalent cross‐linking, to obtain an electroconductive hydrogel OCNT@COF‐Fe@Gel (O@CF@G). This O@CF@G can not only improve the mechanical properties of pure gel but also inherit the multifunction of O@CF. Consequently, it can well adhere to diabetic wounds for imbibition, drug‐resistant biofilm elimination, gram‐positive and negative bacteria killing, hypoxia alleviation, and intercellular electrical signal conduction, thus accelerating wound healing.
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