Herein, molecular imprinting technology (MIT) was introduced into construction of molecularly imprinted triazine-based porous aromatic frameworks (MI-TBPAFs) via Heck-coupling reaction for palladium extracting from wastewater. According to the decorating Pd-vinylpyridine complex (Pd@Vpy), MI-TBPAFs were given considerable tailor-made binding sites with strong affinities for palladium, which captured palladium from various metal ions precisely. The adsorption experiments showed that the extraction capacity of MI-TBPAF-3 was improved by 59.0% (435.4 mg/g) under simulated sunlight radiation. Mechanism analysis proved that Pd²⁺ was reduced into Pd⁰ by MI-TBPAF-3 via photocatalytic and chemical reduction effects originating from triazine base and pyridine nitrogen atoms in the extended π-conjugated framework respectively, thereby greatly increasing adsorption capacity by the sorption-reduction strategy. Organically combining the advantages of MIT, photocatalytic reduction and chemical reduction, three synergistic mechanisms, not only provides a new strategy for highly efficient palladium extraction, but also inspires new insights for precious metal recovery.

在此，将分子印迹技术（MIT）引入分子印迹三嗪基多孔芳香骨架（MI-TBPAFs），通过 Heck 偶联反应从废水中提取钯。根据装饰性 Pd-乙烯基吡啶配合物（Pd@Vpy），MI-TBPAF 被赋予了大量定制的对钯具有强亲和力的结合位点，可以精确地从各种金属离子中捕获钯。吸附实验表明，在模拟日光辐射下，MI-TBPAF-3的提取能力提高了59.0%（435.4 mg/g）。机理分析证明Pd ²⁺被还原为Pd ⁰MI-TBPAF-3通过光催化和化学还原效应分别来自扩展的π共轭骨架中的三嗪碱和吡啶氮原子，从而通过吸附还原策略大大提高了吸附能力。将MIT、光催化还原和化学还原三种协同机制的优势有机结合，不仅为高效提取钯提供了新策略，也激发了贵金属回收的新见解。