Affordable sequestration of basic fuchsin using ferrocene impregnated iron-based metal-organic frameworks

作者：Nidhi Rai, Aazad Verma, Santosh Kumar, Aparna Kesharwani, Jyoti Mittal, Charu Arora · 发表于：Particulate Science And Technology · 年份：2025 · DOI：10.1080/02726351.2025.2567434 · 被引用次数：4 · 研究领域：Metal-Organic Frameworks: Synthesis and Applications、Covalent Organic Framework Applications、Mesoporous Materials and Catalysis

Ferrocene (Fc) exhibits remarkable stability due to the delocalized π-electron system of the cyclopentadienyl rings, which symmetrically bond to the iron center via η5 coordination. However, employing Fc molecules directly in aqueous solutions can result in aggregation and challenging recovery. For the first time, a metal-organic framework (MOF) containing iron has been chosen in this investigation as a support for chemically immobilizing Fc. This study incorporated Fc in iron aminoterephthalic MOF in two different ratios, resulting in FcFe-4 and FcFe-1. The FcFe-4 and FcFe-1 were characterized using IR spectroscopy, PXRD, FESEM, TGA, and N2 adsorption-desorption isotherm. Basic fuchsin dye was eliminated by adsorption on both FcFe-4 and FcFe-1. FcFe-4 outperformed FcFe-1 in terms of removal efficiency and time involved. For both MOFs, the maximum dye adsorption occurred at basic pH, i.e., pH 10, and at higher temperatures. The fuchsin basic (FB) adsorption process follows pseudo-second-order kinetics, FcFe-4 follows adsorption isotherm, while FeFc-1 follows Langmuir isotherm. The process is spontaneous at all temperatures. FcFe-4 was used to study the column technique. The produced MOF is reusable, and ethanol readily desorbs the color. Thus, we may conclude that both MOFs are suitable as dependable and economical FB dye adsorbents.