In this study, the SNP-TiO₂@Cu-MOF composite was prepared successfully by loading non-noble metal modified TiO₂ (SNP-TiO₂) on the surface of copper metal organic skeleton (Cu-MOF), and compared the inactivation efficiency of different photocatalysts to Karenia mikimotoi (K. mikimotoi) under visible light. The obtained photocatalyst had the characteristic crystal faces of Cu-MOF and SNP- TiO₂, and contained functional groups such as Cu-O, -COOH, N-O, P-O, etc., which indicated the structural stability of the photocatalyst. The band gap of SNP-TiO₂@Cu-MOF composite was 2.82 eV, and it had great light absorption ability in visible light region. It was proved to be a mesoporous adsorption material, which had a huge specific surface area (245 m²/g). Compared with other photocatalysts, SNP-TiO₂@Cu-MOF composite showed the strongest photocatalytic activity. When the concentration of composite material was set to 100 mg/L and the exposure time was 6 h, the visible light photocatalytic inactivation efficiency of K. mikimotoi was 93.75 %. By measuring various metabolic indexes of K. mikimotoi under the action of different photocatalysts for 1 h, it was confirmed that cell inactivation was due to the increased membrane permeability and degradation of photosynthetic pigments and main life proteins. This research showed that SNP-TiO₂@Cu-MOF composite material was full of great potential and application prospect in controlling the outbreak of eutrophication.

本研究通过在铜金属有机骨架（Cu-MOF）表面负载非贵金属改性的TiO ₂（SNP-TiO _{2 ），成功制备了SNP-TiO 2} @Cu-MOF复合材料，并比较了失活的效果。不同光催化剂在可见光下对干草木( K. mikimotoi )的效率。_{得到的光催化剂具有Cu-MOF和SNP-TiO 2}的特征晶面，并含有Cu-O、-COOH、NO、PO等官能团，表明光催化剂的结构稳定。_{SNP-TiO 2}的带隙@Cu-MOF复合材料为2.82 eV，在可见光区具有很强的吸光能力。它被证明是一种介孔吸附材料，具有巨大的比表面积（245 m ² /g）。与其他光催化剂相比，SNP-TiO ₂ @Cu-MOF复合材料表现出最强的光催化活性。当复合材料的浓度为100 mg/L，暴露时间为6 h时，K. mikimotoi的可见光光催化灭活效率为93.75 %。通过测量K. mikimotoi的各种代谢指标在不同光催化剂作用下1 h，证实细胞失活是由于膜通透性增加，光合色素和主要生命蛋白降解所致。本研究表明，SNP-TiO ₂ @Cu-MOF复合材料在控制富营养化爆发方面具有巨大的潜力和应用前景。