Unlocking MOF A520 synthesis: investigating critical parameters

Abstract

Aluminium based metal–organic frameworks (MOFs) have emerged as versatile materials with applications in gas and vapor storage, catalysis, and separation. Among these, aluminium fumarate known as MOF A520 or MIL-53(Al)_Fu exhibits promising humidity scavenging properties due to its unique structure, chemical composition and porosity. However, achieving reproducible, low cost and high-yield synthesis remains a challenge. In this study, we systematically investigate the critical parameters influencing green synthesis of MOF A520. Through a hydrothermal method, we explore the impact of aluminium precursor nature and concentration, water and base concentrations in the starting mixture and reaction time. Our findings reveal optimal conditions for MOF A520 crystallization, leading to enhanced yield, purity and cost reduction. This work bridges the gap between laboratory-scale synthesis and industrial-scale production, providing insights that are not available in existing literature.