Abstract
Cu-BTC (BTC=1,3,5-benzenetricarboxylate) metal organic framework (MOF) was synthesized using different solvent conditions with ultrasonic treatment. Solvent mixtures of water/N,N-dimethylformamide (DMF), water/ethanol were used for the reactions with or without a variety of bases under 20kHz ultrasonically treated conditions. Prepared crystals were purified through 30min of sonication to remove unreacted chemicals. Treatment time and ultrasonic power effects were compared to get optimum synthetic condition. The characterization of MOF powders was performed by scanning electron microscopy, X-ray powder diffraction, infrared-spectroscopy, thermo-gravimetric analysis and specific surface determination using the BET method. Isolated crystal yields varied with different solvent and applied ultrasonic power conditions. A high isolated crystal yield of 86% was obtained from water/ethanol/DMF solvent system after 120min of ultrasonic treatment at 40% power of 750W. Different solvent conditions led to the formation of Cu-BTC with different surface area, and an extremely high surface area of 1430m2/g was obtained from the crystals taken with the solvent condition of water:DMF=70:30.
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