Covalent organic frameworks (COFs) have recently been demonstrated to have great application potentials in water treatment. Their photocatalytic performance towards bacterial disinfection and organic pollutant degradation yet has seldom been investigated. In this study, AgI modified COFs (using 2,5-diaminopyridine and 1,3,5-triformylphloroglucinol as precursors) (COF-PD/AgI) were fabricated and their applications to photocatalytically disinfect bacteria and degrade organic pollutants were investigated. COF-PD/AgI exhibited effective photocatalytic performance towards Escherichia coli disinfection and organic pollutant (Rhodamine B and acetaminophen) degradation. SEM images were employed to investigate cell disinfection process, while theoretical density functional theory (DFT) calculation and intermediates determination were used to elucidate organic pollutant degradation processes. Scavenger experiments, ESR spectra and chemical probes experiments confirmed O₂⁻, h⁺ and OH played important roles in the photocatalytic process. The formation of dual-band Z-scheme heterojunction improved photocatalytic performance. COF-PD/AgI remained high photocatalytic activity in the four consecutive cycles and could serve as a promising photocatalyst for water purification.

最近已证明，共价有机骨架（COF）在水处理中具有巨大的应用潜力。很少研究它们对细菌消毒和有机污染物降解的光催化性能。在这项研究中，制备了AgI改性的COF（使用2,5-二氨基吡啶和1,3,5-三甲酰基间苯三酚作为前体）（COF-PD / AgI），并研究了它们在光催化消毒细菌和降解有机污染物中的应用。COF-PD / AgI对大肠杆菌表现出有效的光催化性能消毒和有机污染物（若丹明B和对乙酰氨基酚）降解。SEM图像用于研究细胞消毒过程，而理论密度泛函理论（DFT）计算和中间体确定用于阐明有机污染物的降解过程。清除剂的实验中，ESR光谱和化学探针实验证实ö ₂ ^- ，H ^ ⁺和OH在光催化过程中发挥重要的作用。双带Z方案异质结的形成改善了光催化性能。COF-PD / AgI在四个连续的循环中仍然保持较高的光催化活性，并且可以用作有希望的水净化光催化剂。