Comparative study of synthesis methods and pH-dependent adsorption of methylene blue dye on UiO-66 and NH-UiO-66.

Chemosphere

Center for Molecular Medicine and Innovative Therapeutics, Murdoch University, Perth, WA, 6150, Australia; School of Chemistry, Damghan University, 36716-45667, Damghan, Iran. Electronic address:

Published: April 2024

Metal-organic frameworks (MOFs) are highly promising adsorbents with notable properties such as elevated adsorption capacities and versatile surface design capabilities. This study introduces two distinct synthesis methods, one lasting 1 h and the other 24 h, for UiO-66 and NH-UiO-66. While both methods yield structures with comparable crystallinity and morphology, the adsorption performance of the cationic methylene blue dye varies at different pH levels. Despite the 24 h synthesis time being optimal for maximum adsorption in both MOFs, the relative difference in NH-UiO-66 adsorption percentage at different times suggests reduced dependency on synthesis time for this property. Notably, NH-UiO-66 exhibits consistent and effective performance across three pH levels, warranting further investigation into its adsorption kinetics and isotherm. The achievement of high adsorption efficiency coupled with a significantly reduced synthesis time underscores the importance of developing simplified synthetic methods, essential for enhancing the practical applicability of MOFs in diverse applications.

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http://dx.doi.org/10.1016/j.chemosphere.2024.141543DOI Listing

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