Bai Yuting, Zhang Shuo, Feng Sisi, Zhu Miaoli, Ma Shengqian
Institute of Molecular Science, Key Laboratory of Chemical Biology and Molecular Engineering of the Education Ministry, Shanxi University, Taiyuan, Shanxi 030006, P. R. China.
Key Laboratory of Materials for Energy Conversion and Storage of Shanxi Province; Shanxi University, Taiyuan, Shanxi 030006, P. R. China.
Dalton Trans. 2020 Aug 11;49(31):10745-10754. doi: 10.1039/d0dt01648a.
Herein, a ternary nanocomposite photocatalyst (MOF-1/GO/Fe3O4) based on a novel Nd-MOF, graphene oxide (GO), and Fe3O4 was successfully prepared. It was verified that the MOF nanoparticles and GO sheets were integrated by means of intimate interfacial contacts and a large number of Fe3O4 microspheres were uniformly loaded on the surface of GO. The ternary nanocomposite was a stable, environmentally friendly, and efficient visible-light photocatalyst, which displayed excellent photocatalytic performance in the degradation of methylene blue (MB) (∼95%) dye within 80 min under sunlight irradiation in the aqueous solution. Compared to MOF-1, the photocatalytic efficiency of the composite was improved by 90% and the excitation wavelength was moved from the ultraviolet to visible region. The enhancement of photocatalytic performance can be ascribed to the introduction of GO, which efficiently accelerated electron migration, minimized the recombination of photogenerated electron-hole pairs, and improved the optical absorption properties, leading to a synergistic facilitation of the photocatalysis process. The ternary composite demonstrated excellent stability and reusability and can be easily recovered by a magnetic field. The study would provide novel avenues for the preparation of highly efficient and environmentally stable photocatalysts for organic wastewater treatment.
在此，基于新型钕基金属有机框架（Nd-MOF）、氧化石墨烯（GO）和四氧化三铁（Fe₃O₄）成功制备了一种三元纳米复合光催化剂（MOF-1/GO/Fe₃O₄）。经证实，MOF纳米颗粒与GO片层通过紧密的界面接触结合在一起，并且大量的Fe₃O₄微球均匀地负载在GO表面。该三元纳米复合材料是一种稳定、环保且高效的可见光光催化剂，在水溶液中阳光照射下80分钟内对亚甲基蓝（MB）染料的降解显示出优异的光催化性能（约95%）。与MOF-1相比，该复合材料的光催化效率提高了90%，激发波长从紫外区域移至可见区域。光催化性能的增强可归因于GO的引入，它有效地加速了电子迁移，使光生电子-空穴对的复合最小化，并改善了光吸收性能，从而协同促进了光催化过程。该三元复合材料表现出优异的稳定性和可重复使用性，并且可以通过磁场轻松回收。该研究将为制备用于有机废水处理的高效且环境稳定的光催化剂提供新途径。
