共价键
催化作用
材料科学
化学工程
高分子科学
化学
有机化学
工程类
作者
Yamei Liu,Quan Zhou,Hongde Yu,Qiqi Yang,Mingchao Wang,Chuanhui Huang,Xiang Liang,Chen Li,Thomas Heine,Guoqing Hu,Shengyao Wang,Xinliang Feng,Yiyong Mai
标识
DOI:10.1002/anie.202400985
摘要
Introducing continuous mesochannels into covalent organic frameworks (COFs) to increase the accessibility of their inner active sites has remained a major challenge. Here, we report the synthesis of COFs with an ordered bicontinuous mesostructure, via a block copolymer self‐assembly‐guided nanocasting strategy. Three different mesostructured COFs are synthesized, including two covalent triazine frameworks and one vinylene‐linked COF. The new materials are endowed with a hierarchical meso/microporous architecture, in which the mesochannels exhibit an ordered shifted double diamond (SDD) topology. The hierarchically porous structure can enable efficient hole‐electron separation and smooth mass transport to the deep internal of the COFs and consequently high accessibility of their active catalytic sites. Benefiting from this hierarchical structure, these COFs exhibit excellent performance in visible‐light‐driven catalytic NO removal with a high conversion percentage of up to 51.4%, placing them one of the top reported NO‐elimination photocatalysts. This study represents the first case of introducing a bicontinuous structure into COFs, which opens a new avenue for the synthesis of hierarchically porous COFs and for increasing the utilization degree of their internal active sites.
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