Capturing and storing carbon dioxide (CO2) is now of concern. This work presents a task-specific ionic liquid (TSIL), triethylbutylammonium acetate ([N2224][CH3COO]), for the purpose of trapping CO2 instead of the commonly used organic amine solutions. Since [N2224][CH3COO] has a hydrophilic nature, the CO2 dissolution behavior into [N2224][CH3COO]−nH2O complexes has been investigated in detail, including the absorption rate, absorption capacity, and the ability of repeating absorption. The solubilities of CO2 into [N2224][CH3COO]−1H2O at 0 °C, 25 °C, 40 °C, and 60 °C from (0.007 up to 30) bar are presented. The results show strong evidence that [N2224][CH3COO]−1H2O is an excellent reversible absorbent for CO2, and the recovered [N2224][CH3COO]−1H2O maintains the same absorption capacity and absorption rate. The CO2 absorption into [N2224][CH3COO]−nH2O mixtures at 25 °C and pressures up to 30 bar is also studied. It is elucidated that the absorption capacity decreases with the content of water and the rise of operational temperature. The equilibrium constant, Henry’s law constant, overall rate constant, and activation energy are also calculated from the experimental data. All evidence indicates that [N2224][CH3COO]−nH2O with low viscosity may have potential to be used as good absorbents for CO2 capture.

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We investigate the molecular orientation transition and resulting morphology of copper phthalocyanine (CuPc) thin films induced by solvent-vapour annealing (SVA) in detail. Seven solvents are utilized to tune the morphology of CuPc thin films. The morphology, crystalline structure and optical properties of the CuPc active layer were investigated through field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD) and ultraviolet-visible (UV-Vis) absorption spectrum, respectively. The result demonstrates that morphology and structure are depended on the type of solvents. The high crystallinity of the CuPc films with a larger grain size and less grain boundaries can be observed. As a result, the resistance of the conducting channel is decreased, leading to an improved performance of the organic field-effect transistor (OFET).

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