A bismuth-based metal-organic framework with potential application in organic pollutant removal

Area of Science:

• Materials Science
• Environmental Chemistry
• Nanotechnology

Background:

• Metal-organic frameworks (MOFs) offer tunable structures and functionalities for diverse applications.
• Bismuth (Bi) compounds are recognized for their biocompatibility and photoactivity, making them attractive for catalysis.
• Developing novel MOFs with enhanced performance for environmental remediation is an ongoing research focus.

Purpose of the Study:

• To synthesize and characterize a new bismuth-based MOF, Bi-MOF720-1.
• To investigate the potential of Bi-MOF720-1 in high-performance photocatalysis for organic pollutant degradation.
• To evaluate the synergistic adsorption and photocatalytic capabilities of the novel MOF.

Main Methods:

• Synthesis of Bi-MOF720-1 using bismuth nitrate pentahydrate and 9,10-anthracenedicarboxylic acid (H2ADC).
• Single-crystal X-ray diffraction for structural determination (2D network, R3̄ space group, hcb topology).
• Photocatalytic degradation experiments using rhodamine B as a model pollutant.

Main Results:

• Successful synthesis of a phase-pure bismuth-based MOF, Bi-MOF720-1.
• Bi-MOF720-1 exhibits a 2D hexagonal grid topology with Bi3+ ions in a distorted nine-coordinate geometry.
• Achieved 96.48% degradation of rhodamine B in 60 minutes, showcasing high photocatalytic efficiency and adsorption capacity.

Conclusions:

• Bi-MOF720-1 is a promising material for efficient organic pollutant treatment due to its synergistic adsorption and photocatalytic properties.
• The structural characteristics of Bi-MOF720-1 contribute to its excellent dye removal performance.
• This study highlights the potential of bismuth-based MOFs in environmental remediation applications.