MOF Materials for the Capture of Highly Toxic H₂S and SO₂

Abstract

Metal–organic frameworks (MOFs) are some of the most interesting and promising candidates to sequester toxic H2S and SO2 gases. MOFs show interesting advantages over classic porous materials due to their chemical composition, ligand functionality, cavity dimensions, ease of preparation, and relatively low cost reactivation. The optimization of the physical–chemical interactions between MOFs and H2S and SO2 molecules is the key to further amplification of their capture. Reversibility after the adsorption of H2S and SO2 can be modulated through noncovalent bonding between functionalized ligands (within MOF structures) and H2S and SO2. This review aims to summarize recent advances in the development of MOF-based systems for the capture and removal of H2S and SO2. We anticipate that this review article can offer very useful information on the significant and rapid progress of the enhancement of H2S and SO2 capture by MOFs.