Composites of HKUST‐1@Nanocellulose for Gas‐Separation and Dye‐Sorption Applications

Abstract

In this study, composites of HKUST‐1 MOF with nanocellulose, HKUST‐1@NCs, have been prepared and explored for CO2/N2 gas‐separation and dye‐sorption based applications. Our biopolymer‐MOF composites are prepared via a copper ion pre‐seeding method, in which, the HKUST‐1 crystallites are grown in situ on the Cu‐seeded and carboxylate anchored NC fibers for a better interfacial integration between the MOF and the polymer matrices. Static gas sorption studies show the capability of one of our HKUST‐1@NC composites to reach ∼300 % enhancement in the CO2/N2 sorption selectivity compared to the corresponding MOF alone ‐ blank reference sample prepared at similar conditions. The same composite, C100, in the bulk powder form, shows a remarkable IAST sorption selectivity of 298 (CO2/N2) at 298 K and 1 bar for the CO2/N2 (15/85, v/v) gas mixture. The relative position of the C100, in the bound plot visualizations of the CO2/N2 separation trade‐off factors indicate a significant potential. The HKUST‐1@NC composites have also been processed along with a polymeric cellulose acetate (CA) matrix as HKUST‐1@NC@CA films to study them as free‐standing mixed‐matrix membranes. The CO2/N2 sorption selectivity, at 298 K and 1 bar is 600 for one such membrane, C‐120@CA, as bulk sample studied by the static gas sorption. The composite, C120, exhibits a good uptake with an enhancement of 11 % for alizarin and 70 % for Congo red in comparison to the uptakes of the corresponding blank reference HKUST‐1 sample, B120.

Copper(ii)-MOFs for bio-applications

“…Each of the reported copper-based MOFs has many unique advantages that make them attractive for use in a wide variety of applications, from catalysis to medicine. 29–31 For example, HKUST-1 (also known as MOF-199, Cu-BTC and Basolite C300), is one of the copper-based MOFs developed for the detection of biological signals, being the most reported and used for the detection of glucose, proteins and other biological molecules, 32 but it has also proven useful for the detection of environmental contaminants, separation and purification of chemical compounds, as well as the detection and removal of harmful gases, as well as drug delivery. 33–37…”

Computational Simulation of CO2/CH4 Separation on a Three-Dimensional Cd-Based Metal–Organic Framework

“…MOFs are porous inorganic materials that have received much attention recently owing to their outstanding characteristics, such as significant surface area and porosity, thermal/chemical stability, and tunability. − MOFs are considered promising materials for a variety of potential applications across various fields, including gas storage and separation, chemical sensing, biomedical applications, adsorption, and heterogeneous catalysis. − They are considered as one of the most promising physical adsorbent materials in the process of separating CO 2 /CH 4 . The engineering design of MOFs for gas separation applications is currently a rapidly growing area of research. − Numerous experimental and simulation-based studies have been documented involving the separation of CO 2 from CH 4 through the use of MOFs. − Considering the quadrupole moment and polarizability of CO 2 , current research efforts to enhance CO 2 uptake and selectivity primarily involves strategies aimed at improving the interaction between CO 2 and the frameworks. These include, but are not limited to, the utilization of various open metal sites, the insertion of functional groups, , the development of smart adsorbents, and ligand shortening in MOFs. , An investigation showed that MOF-801­(Ce) displayed improved separation performance for CO 2 /N 2 and CO 2 /CH 4 compared to MOF-801­(Zr/Hf) .…”