Sustainable Approaches for Materials Engineering With Supercritical Carbon Dioxide

PdRu Bimetallic Nanoparticles/Metal–Organic Framework Composite through Supercritical CO2–Assisted Immobilization

“…The morphology of the products could be improved by varying the operating temperature, pressure, contact time, and CO 2 volume rate. , ScCO 2 can surpass the diffusivity and mass transfer limitations of conventional solvents and load sufficient amounts of target materials, such as metal precursors, into the pores and MOF surfaces . Currently, drying with scCO 2 is used to improve the pore stabilities of the MOFs. − Recently, immobilization techniques using catalytically active bimetallic NPs assisted by scCO 2 have been considered for the preparation of porous carbon and silica materials. − …”

Supercritical CO2‐assisted formation of metal–organic framework‐loaded porous polystyrene membranes for dye removal

“…MOFs with a permanent porosity and large surface area are obtained by removing guest solvent molecules from the pores of MOFs after synthesis. These processes for removing solvent molecules and excess linkers are termed “activation.” 31 Drying with scCO 2 is commonly used for the preparation of MOFs 32,33 . ScCO 2 is a highly versatile solvent for material processing, and its application allows the low‐energy production and design of high‐performance functional materials essential for developing environmentally friendly chemical processes 34 …”

“…31 Drying with scCO 2 is commonly used for the preparation of MOFs. 32,33 ScCO 2 is a highly versatile solvent for material processing, and its application allows the low-energy production and design of high-performance functional materials essential for developing environmentally friendly chemical processes. 34 In this study, we synthesized a MOF (Cu 3 (BTC)) and loaded it onto a microporous polystyrene (PS) membrane via phase separation using scCO 2 as a nonsolvent for the polymer solution.…”

Predicting the solubilities of metal acetylacetonates in supercritical CO2: Thermodynamic approach using PC-SAFT

“…Methods for depositing metals and metal oxides onto substrates using supercritical fluids as solvents, particularly supercritical carbon dioxide (scCO2), have attracted increasing attention for preparing supported catalytic metal nanoparticles [1][2][3][4][5][6][7][8][9] and electronic devices [10][11][12][13][14][15][16]. The use of scCO2 has several important advantages over conventional liquid-solvent methods, such as the solvent power for metal precursors, which can be tuned by adjusting the temperature and pressure, high diffusivity into the microstructure of the substrate, low surface tension, and not requiring a drying process [17,18]. Dissolving a solid metal precursor in scCO2 [17,18] is the first step in deposition processes using scCO2, and hence, quantifying the metal precursor solubilities is indispensable for designing these processes.…”

“…The use of scCO2 has several important advantages over conventional liquid-solvent methods, such as the solvent power for metal precursors, which can be tuned by adjusting the temperature and pressure, high diffusivity into the microstructure of the substrate, low surface tension, and not requiring a drying process [17,18]. Dissolving a solid metal precursor in scCO2 [17,18] is the first step in deposition processes using scCO2, and hence, quantifying the metal precursor solubilities is indispensable for designing these processes. Therefore, to date, solubility data for various metal precursors in scCO2 have been experimentally obtained, e.g.…”