Eco-friendly and efficient sulfamic acid functionalized MIL-53 (Al) nanocomposite for removal of hazardous pollutants from wastewater and catalytic synthesis of 3,4-dihydropyrimidinone pharmacological moiety

Abstract

This study proposed the facile synthesis of sulfamic acid functionalized MIL-53 (Al) (SA@MIL-53(Al)) nanocomposite for dual-functional pollutant removal and catalytic synthesis. The composite was synthesized through a facile, straightforward, and one-step solvothermal process. Furthermore, different analysis techniques like XRD, SEM, XPS, FT-IR, and TGA were applied to examine the prepared composites' structure properties, confirming the successful preparation of functionalized frameworks. Several factors, including the initial concentration of pollutants, adsorbent dosage, pH, and pHpzc, have been established to optimize the suitable parameters for adsorption. 25 wt.% SA@MIL-53(Al) has the greatest adsorption capacities of 146.5, 97.7, and 35.5 mg g−1 for removing MB, CR dyes, and Pb (II), respectively. The rate-limiting steps were also discussed, and the experimental adsorption measurements obeyed the Langmuir and the pseudo-second-order kinetic models. Moreover, the fabricated composites were used as catalysts to produce 3,4-dihydropyrimidinone (3,4-DHP). 50 wt.% SA@MIL-53(Al) demonstrated the highest efficiency, nearly 92.0 %, with great durability and stability.