Adsorption of Nitrogen on Mn(II) Metal-Organic Framework Nanoparticles

Abstract

Adsorption of N2 on mixed-ligand benzoic acid and 1, 10-phenanthroline ligand of Mn(II)metal-organic framework (MOF)–nanoparticles were demonstrated. The synthesized nanostructures arecharacterized by techniques such as scanning electron microscopy (SEM), fourier-transform infraredspectroscopy (FT-IR), and UV-visible spectrophotometry (UV-Vis). The pore size distribution andadsorption capacity of the synthesized MOF were investigated experimentally by measuring the N2adsorption isotherm at 77.3 K, and the resulting data were fitted to Brunauer-Emmett-Teller (BET), deBoer, Dubinin-Radushkevich (DR), Banet-Joyner-Halenda (BJH), Horvath-Kawazoe (HK), and alsoapplied to Density Functional Theory (DFT) models. Excitation of the Mn-MOF nanostructure resulted inan emission at 400 nm. The DSC study reveals that this molecule has a good chemical stability. The FTIR measurement shows a variety of functional groups that are highly coordinated. Moreover, theadsorption properties evaluated by several adsorption models compared with current adsorbentmaterials show Mn-MOF has superior thermal stability, a high surface area, and pore openings. Becauseof these findings, Mn-MOF appears to be a viable material for storing gases and energy, whether at lowor high pressures.