On the adsorption properties and applications of mixed-linker MOFs based on HKUST-1

• Published in: Journal of solid state chemistry Vol. 312; p. 123260
• Main Authors: Puerto-Rodríguez, Macarena, López-Cartes, Carlos, Ayala, Regla
• Format: Journal Article
• Language: English
• Published: Elsevier Inc 01.08.2022
• Subjects: Environmental applications; HKUST-1; Mixed-linker MOF; Mixed-linker MOF; Environmental applications; HKUST-1
• ISSN: 0022-4596; 1095-726X
• DOI: 10.1016/j.jssc.2022.123260

Different mixed-linker MOFs based on HKUST-1 have been successfully synthesized using BtTC (1,2,4,5-benzenetetracarboxylate) and BDC (1,4-benzenedicarboxylate) as modulator ligands. These MOFs maintain the HKUST-1 structure up to 25% and 50% of trimesic acid replacing with BtTC and BDC ligands, respectively. A low percentage of modulator ligand provokes an increasing of the MOF surface area keeping its microporosity whereas a higher content of BtTC induces mesoposority in the samples. The adsorption of moisture ambient or vapour iodine reveals that there is a relation between the surface area and the capacity of adsorption of the samples. However, this relation is not found in the experiments of Congo Red removal from aqueous and ethanol solutions. The pH of the solutions has a significant effect on the adsorption capacity of the samples. [Display omitted] •Mixed-linker MOFs based on HKUST-1 have been successfully synthesized.•HKUST-1 features change by introduction of terephthalate and piromellitate ligands.•Mixed-linker MOFs have great potential as adsorbents in environmental applications.•A low percentage of modulator ligand increases the mixed-linker MOF surface area.