SYNTHESIS OF METAL - ORGANIC FRAMEWORKS (MOFS) MIL - 53 (AL) TYPE USING IONIC LIQUID BY ELECTROSYNTHESIS METHOD

• Main Author: AZKA SABIL NIM:10514068, MUHAMMAD
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/29156
• Institution: Institut Teknologi Bandung

MIL-53 (Al) type MOF is known to have high thermal stability, used as alkylation reaction catalyst and Friedel-Crafts acylation, material for absorbent and separation CO2 gas, and 6-mercaptopurine fluorescence sensors. The conventional method in MIL-53 (Al) synthesis is a solvotermal method. The solvotermal method usually needs high temperature and pressure, and long reaction time. Recently, electrosynthesis method is developed due to relatively easy to apply, no need high temperature and pressure (~25 °C, 1 atm), and could be run in short time. In this study, MIL-53 (Al) is synthesized by electrosynthesis method with various voltage and the influence of temperature. In addition, MIL-53 (Al) product of electrosynthesis method was compared to MIL-53 (Al) products of solvotermal method and stirring method. MIL-53 (Al) was characterized with FTIR, PXRD, SEM, and TG analysis techniques. All MIL-53 (Al) products show a redshift from 1680 cm-1 to 1600 cm-1 which correlated to coordination of BDC (benzene dicarboxylate) ligand on aluminum metal. The typical peak MIL-53 (Al)BP at 2θ (9,30°; 12,58°; 17,76°; 25,10°; 27,16°) was observed on diffractogram of product of solvotermal method and stirring method. Both products have a crystallinity of 54,94% and 27,77% respectively. However, different typical peaks of MIL-53 (Al) at 2θ (9,30° and 17,76°) were observed on the diffractogram of product of electrosynthesis method. This difractogram peak is corresponding with MIL-53 (Al)SP and has an amorphous phase. SEM images show that MIL-53 (Al)BP has particle sizes between 2,5-5 μm and 50-400 nm for MIL-53 (Al)SP. A trapezoid-like shape is seen for MIL-53 (Al) synthesized by solvotermal method, while the granular form are seen for MIL-53 (Al) synthesized by stirring and electrosynthesis method. TG analysis show MIL-53 (Al) solvotermal results have higher thermal stability with decomposition temperature up to 650 °C.