Systematic Study on MIL-100(Fe) Synthesis Conditions to Enhance Its Properties as a Green Material for CO<sub>2</sub> Capture
Soňa Lisníková, Petr Novák
Abstract
High Resolution Image Download MS PowerPoint Slide This study investigates the optimization of MIL-100(Fe) metal–organic framework (MOF) synthesis for enhanced CO 2 adsorption, focusing on the effects of the reaction time, initial pressure, and precursor concentration on the BET surface area, crystallinity, and pore size distribution. Through hydrothermal synthesis, three MIL-100(Fe) series were developed to examine the relationship between structural parameters and CO 2 uptake, characterized by powder X-ray diffraction (XRD), adsorption analysis, and Mössbauer spectroscopy. The results show that higher precursor concentrations lead to increased crystallinity and surface area, with BET values reaching a peak at 1775 m 2 /g. The sample with the optimal precursor concentration demonstrated the highest CO 2 uptake at 1.91 mmol/g, likely due to the presence of fine hematite nanoparticles within the structure. Additionally, the samples exhibited excellent stability and reusability in the cyclic CO 2 sorption experiments. These findings provide valuable insights into the synthesis-structure–property relationships in MIL-100(Fe), enhancing its potential for CO 2 capture and environmental remediation.