The rapidly growing CO 2 in the atmosphere demands a highly porous material for efficient CO 2 capture. Herein, the solvothermal method is employed to synthesize the HKUST‐1 MOF, using single‐solvent systems and mixed‐solvent systems (DMF, ethanol, water, and acetonitrile) in order to understand their impact on the framework properties. The results demonstrated that modifications in the solvent system exceptionally altered the crystallite size (ranging from ∼31 to 79 nm), morphology, and textural properties while maintaining the core framework. Fascinatingly, PD has the largest surface area, measuring 1145.5 m 2 /g, with a total pore volume of 0.46 cm 3 /g. Yet, the CO 2 adsorption performance test carried out at 298 K and up to a pressure of 1 bar followed the trend: DE > EW > PD > DW > AE > PE > AW. The performance of DE has been attributed to its significant open Cu 2+ binding sites, crystallite size, and engineered pore structure that leads to the CO 2 adsorption of 3.58 mmol g −1 . Lastly, a regeneration test on the best‐performing material (DE) indicates that it can maintain up to 75% of its initial capacity, suggesting that it can be reused for at least three cycles. Ultimately, these findings suggest that solvent‐mediated synthesis impacts the overall characteristic features of the material, leading to variation in the adsorption capacity.
Kumari et al. (Sun,) studied this question.