The photocatalytic conversion of CO₂ into high-value chemicals is an ideal pathway to adjust the energy structure and reduce greenhouse gas emissions. In this work, we reported a facile synthetic strategy of new photocatalyst (ZnFe₂O₄/FeP-CTFs), where ZnFe₂O₄ nanoparticles (NPs) was in situ growth on iron porphyrin covalent triazine-based frameworks (FeP-CTFs) via one-pot ionothermal method. Such strategy can effectively prevent ZnFe₂O₄ from agglomerating and blocking the pore structure of CTFs. Notably, a series of experiments demonstrated that anchoring sites of FeP-CTFs can effectively promote the crystal-plane ratio of high catalytic performance, in the assistance of Ru(bpy)₃²⁺, promoting higher photocatalytic CO₂ reduction activity (178 μmol h^-1 g^-1 for CO) of the as-prepared ZnFe₂O₄/FeP-CTFs under visible light compared with pure ZnFe₂O₄, FeP-CTFs, and their physical mixtures. A combination of experimental measurements and density functional theory calculation reveals that the strong interactions between ZnFe₂O₄ NPs and FeP-CTFs support can facilitate the charge separation of photogenerated carriers and thereby benefit to photocatalytic CO₂ reduction.

CO ₂的光催化转化为高价值化学品是调节能源结构和减少温室气体排放的理想途径。在这项工作中，我们报告了一种新型光催化剂（ZnFe ₂ O ₄ / FeP-CTFs）的简便合成策略，其中ZnFe ₂ O ₄纳米颗粒（NPs）在基于卟啉铁的共价三嗪铁骨架（FeP-CTFs）上原位生长。通过一锅电热法。这种策略可以有效地防止ZnFe ₂ O ₄防止团聚和阻塞CTF的孔结构。值得注意的是，一系列实验表明，在Ru（bpy）₃ ²⁺的辅助下，FeP-CTFs的锚定位点可以有效地促进高催化性能的晶面比，从而促进较高的光催化CO ₂还原活性（178μmol·h）。与纯ZnFe ₂ O ₄，FeP-CTF及其物理混合物相比，可见光下制备的ZnFe ₂ O ₄ / FeP-CTF的^-1 g ^-1 CO）。实验测量和密度泛函理论计算的结合表明，ZnFe ₂ O之间的强相互作用_4个NP和FeP-CTF的支持可以促进光生载流子的电荷分离，从而有利于光催化CO _2的还原。