| 초록 |
In this study, large quantities of UiO-66 were sucessfully prepared by continuous –flow processing under microwave irradation. The precursor solutions were continously transfered by a pump system into the microwave oven, which had set up at a desired temperature (80⁓120 oC) and irradation frequency (500 W). The results show that UiO-66 crystals with nanosacale particles (⁓20 nm) were obtained within a very short residence time of 5⁓10min, which were much less than that of conventionally sovothermal syntheses (⁓12h) at the same reaction temperature. The yield, porosity and cristalinity of product were affacted by HCl concentration, residence time and temperature. The prepared UiO-66 had the highest BET surface area and yield of 1320 m2.g-1 and 91%, respectively, which are comparable to conventionally sovothermal synthesis. Multi-gram high quality product was obtained within few minutes of reaction time, suggesting that continous-flow microwave can be a potential approach for a large scale synthesis of UiO-66. |
