Redox‐Active Metal–Organic Composites for Highly Selective Oxygen Separation Applications

Abstract

A redox-active metal-organic composite material shows improved and selective O2 adsorption over N2 with respect to individual components (MIL-101 and ferrocene). The O2 sensitivity of the composite material arises due to the formation of maghemite nanoparticles with the pore of the metal-organic framework material.

Effect of ring rotation upon gas adsorption in SIFSIX-3-M (M = Fe, Ni) pillared square grid networks

“…9–14 Understanding these relationships could enable us to engineer such dynamic properties into MOFs and exploit them for applications such as gas storage, chemical sensing, drug delivery, and luminescence. 15–22 The dynamics of the organic linker can play a significant role in the properties of the MOF, including the adsorption and diffusion behavior, capacity, and selectivity.…”

Hierarchically Porous Co-MOF-74 Hollow Nanorods for Enhanced Dynamic CO2 Separation

“…MOFs are a class of microporous crystalline materials built with metal nodes and organic ligands that are held together via coordination bonding. In comparison to other porous materials, MOFs hold a great promise for a wide range of applications, such as gas storage and separation, because of their high accessible surface area and tunable functionality. − Indeed, some MOFs possessing functional groups and/or open metal sites that can interact with CO 2 have shown an outstanding CO 2 uptake capacity along with a good selectivity under equilibrium condition which is ideally controlled. For example, isoreticular M-MOF-74 materials (M = Mn, Co, Mg, Ni, also known as M-CPO-27) with high density of open metal sites (ca.…”

Metal-organic Framework-based Materials: Synthesis, Stability and Applications in Food Safety and Preservation

“…[227] Zhang et al presented an interesting strategy to improve the selective adsorption of oxygen at room temperature using a synthetic ferrocene in MIL-101 composites. [228] The ferrocene was loaded in heated MIL-101 by a vapordeposition method at 120 °C, reaching a maximum theoretical loading value of 1.2 g of ferrocene per gram of MIL-101 (i.e., 4.5 ferrocene per formula unit) within ~72 h. This synthetic ferrocene in MIL-101 composite showed a remarkable absorption capacity of oxygen compared to MIL-101 only after activated at temperatures of 200 to 350 °C, which suggested a significant oxygen separation and removal capacity against nitrogen, carbon dioxide, and argon, and provided a potential to prevent the autoxidation of food components in storage.…”