Abstract
Nowadays, materials with great potential for environmental protection are being sought. Metal–organic frameworks, in particular those with cobalt species as active sites, have drawn considerable interest due to their excellent properties. This review focuses on describing cobalt-based MOFs in the context of light-triggered processes, including dye degradation, water oxidation and splitting, carbon dioxide reduction, in addition to the oxidation of organic compounds. With the use of Co-based MOFs (e.g., ZIF-67, Co-MOF-74) as photocatalysts in these reactions, even over 90% degradation efficiencies of various dyes (e.g., methylene blue) can be achieved. Co-based MOFs also show high TOF/TON values in water splitting processes and CO2-to-CO conversion. Additionally, the majority of alcohols may be converted to aldehydes with efficiencies exceeding 90% and high selectivity. Since Co-based MOFs are effective photocatalysts, they can be applied in the elimination of toxic contaminants that endanger the environment.
Highlights
When thinking of an inexhaustible source of energy, the sun comes first
11 of ver, the light absorption is higher for the composite than for the Metal–organic frameworks (MOFs) alone, ind that the combination of these materials increases their effectiveness in oxygen evolution reaction (OER) [101]
This review shows the enormous application potential of cobalt-based MOFs and their composites in photocatalytic processes including dye degradation, water and organic compound oxidation, and CO2 reduction
Summary
When thinking of an inexhaustible source of energy, the sun comes first. Sunlight offers a huge package of energy, and the only limitation is the ability to harvest it properly. The scaffold of MOFs stabilizes the Co-nodes, immobilizes the linkers, and confines the catalytically active guests This ensures an accessible interface and high dispersion of Co active sites. MOFs can be recovered after the catalytic reaction due to their solid structure Noble metals such as Pt and Rh, metal oxides e.g., TiO2 are great promoters in light-triggered catalysis, but they are expensive and can catalyse the reaction backwards, Catalysts 2022, 11, x FOR PEER REVIEW. Noble metals such as Pt and Rh, metal oxides e.g., TiO2 are great promoters in lighttriggered catalysis, but they are expensive and can catalyse the reaction backwards, the search for new and the usethe of use other must be considered [49]. Lution, water splitting for H2 generation, CO2 reduction to CO, and oxidation of organic compounds
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