Green route of flexible Al-MOF synthesis with superior properties at low energy consumption assisted by ultrasound waves

In this literature, it was successfully prepared metal-organic framework MIL-53(Al) for the first time at convenient conditions using sonication irradiation. Comparison of Sonochemical-assisted hydrothermal synthesis with conventional hydrothermal method had been investigated. Suitable morphology and unique porosity properties were obtained through Sonochemical-assisted approach, which has presented excellent features and good thermal stability for crystals samples with nano-sized particles versus the conventional hydrothermal method. Low reaction temperature of 150 degrees C and short time of synthesis 6 h investigated pure crystallinity of MIL-53(Al) via Sonochemical-assisted synthesis due to its ability to supply controlled amounts of energy to the solution that leads to increase nucleation rate and crystal growth. The characterization of samples was specified using X-ray diffraction (XRD), Scanning Electron Microscope (SEM), Fourier Transform Infrared Spectroscopy (FTIR), Nitrogen Adsorption Technique (BET) and Thermal Gravimetric Analysis (TGA). Highest surface area is nearly to 1363.5 m2/g, best thermal stability up to 600 degrees C, more uniform and narrower size distribution in the range of 0.7-0.93 mu m at short sonication time 24 h and low temperature at 150 degrees C were observed.

Automated summary

Metal-organic framework MIL-53(Al) was successfully prepared using sonication irradiation for the first time, and the sonochemical-assisted method showed superior characteristics and thermal stability compared to the conventional hydrothermal method. The short sonication time and low temperature synthesis conditions resulted in samples with higher surface area and narrower size distribution.