Abstract Developing high-efficient supporter is important for enhancing pollutants removal efficiency of a catalyst. Materials Institute Lavoisier-101(Cr) (MIL-101(Cr)) is one of metal-organic frameworks (MOFs). In this study, a novel visible-light-driven absorptive photocatalyst, TiO2-loaded magnetic MOFs composite (TiO2/mag-MIL-101(Cr)), was synthesized to improve the reusability, the adsorption and photocatalytic efficiency under visible-light. The as-synthesized TiO2/mag-MIL-101(Cr) was systematically characterized and used for adsorbing and photodegrading refractory organics, bisphenol-F (BPF) and acid red 1 (AR1), from water. Mag-MIL-101(Cr) remarkably enhances the light-absorption of TiO2, and the band-gap value of TiO2/mag-MIL-101(Cr) is 1.61 eV. TiO2/mag-MIL-101(Cr) exhibited outstanding removal efficiency to bisphenol-F and AR1, which was attribute to the large adsorption capacity of mag-MIL-101(Cr) and the enhanced separation properties of photogenerated electrons and holes. In the photocatalytic process, h+ is proved to be a predominant active species, while ·OH and ·O2− play an auxiliary role. The proposed strategy is an attempt to design new semiconductor-MOF photocatalytic materials for degrading organic contaminants in water under visible light.

中文翻译：

---

可见光下去除水中有机污染物的二氧化钛/磁性金属-有机骨架制备

摘要 开发高效的载体对于提高催化剂的污染物去除效率具有重要意义。材料研究所 Lavoisier-101(Cr) (MIL-101(Cr)) 是一种金属有机框架 (MOF)。在这项研究中，合成了一种新型可见光驱动的吸收光催化剂，负载 TiO2 的磁性 MOFs 复合材料（TiO2/mag-MIL-101(Cr)），以提高可见光下的可重复使用性、吸附和光催化效率。合成的 TiO2/mag-MIL-101(Cr) 被系统地表征并用于从水中吸附和光降解难熔有机物，双酚-F (BPF) 和酸性红 1 (AR1)。Mag-MIL-101(Cr)显着增强了TiO2的光吸收，TiO2/mag-MIL-101(Cr)的带隙值为1.61 eV。TiO2/mag-MIL-101(Cr) 对双酚 F 和 AR1 表现出出色的去除效率，这归因于 mag-MIL-101(Cr) 的大吸附容量和增强的光生电子和空穴的分离性能。在光催化过程中，h+被证明是主要的活性物种，而·OH和·O2-起到辅助作用。所提出的策略是尝试设计新的半导体-MOF 光催化材料，用于在可见光下降解水中的有机污染物。