A Bismuth-Based Metal-Organic Framework with Potential Application in Organic Pollutant Removal

Metal-organic frameworks (MOFs) with structure diversity and functionality versatility have shown great potency in many fields. In this work, we proposed utilizing the good biocompatibility and photoactivity of bismuth to construct new MOFs with special potential in high-performance photocatalysis. A new bismuth-based MOF, Bi-MOF720-1, was successfully synthesized using bismuth nitrate pentahydrate as the metal source and 9,10-anthracenedicarboxylic acid (H2ADC) as the organic ligand. Single-crystal structure analysis revealed that Bi-MOF720-1 is a two-dimensional network and crystallizes in the space group of R, featuring Bi3+ ions in a distorted nine-coordinate geometry and exhibiting a hexagonal grid topology with the net symbol hcb and a point symbol of {6³}. Furthermore, the material exhibits high phase purity and can effectively remove Rhodamine B from aqueous solutions. Leveraging the synergistic effect of adsorption and photocatalysis, it achieves a degradation efficiency as high as 96.48% within 60 minutes, while also demonstrating strong adsorption capacity for various dyes. These results highlight its excellent dye removal performance and promising potential for application in organic pollutant treatment.