Comparative study of synthesis methods and pH-dependent adsorption of methylene blue dye on UiO-66 and NH 2 -UiO-66

• Published in: Chemosphere (Oxford) 2024-04, Vol.353, p.141543
• Main Authors: Daneshgar, Hossein, Sojdeh, Soheil, Salehi, Ghazal, Edrisi, Mohammad, Bagherzadeh, Mojtaba, Rabiee, Navid
• Format: Article
• Language: English
• Subjects: Adsorption; Hydrogen-Ion Concentration; Metal-Organic Frameworks; Methylene Blue; Phthalic Acids; Water Pollutants, Chemical - chemistry
• ISSN: 1879-1298
• DOI: 10.1016/j.chemosphere.2024.141543

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.