SYNTHESIS AND CHARACTERIZATION OF NANOFIBER COMPOSITE FE-CU-BTC/PVDF COPOLYMERS AND ITS POTENTIAL AS CO2 GAS ADSORBENT

• Main Author: Ida Sugatri, Rana
• Format: Theses
• Language: Indonesia
• Subjects: Kimia
• Online Access: https://digilib.itb.ac.id/gdl/view/69065
• Institution: Institut Teknologi Bandung

MOF (Metal-organic framework) Fe-Cu-BTC (Ferrum-Copper-Benzena-1,3,5- tricarboxylate) was successfully synthesized via post-synthetic modification cation exchange by dispersing Cu-BTC in iron nitrate solution then heated using a microwave with assisted modified microwave oven by condensor reflux system at 950 Watt for 20 seconds. PXRD diffractogram and IR spectrum confirmed the intensities at 2? = 6,7, 9,6, 11,6, 13,4, 19,0, and 25,9o and typical bands at wavenumbers 1645,0, 1448,3, and 729,0 cm-1 of Cu-BTC with distributed Fe element that was detected by EDS mapping. The presence of Fe could maintain octahedral frameworks of Cu-BTC, increase BET-specific surface area to 828 m2 g-1 of Fe-Cu-BTC from 824 m2 g-1 of Cu-BTC, and enhance thermal stability. Electrospinning successfully spun Fe-Cu-BTC into the nanofiber composite of poly (vinylidene fluoride) (PVDF) copolymers. The IR spectrum confirmed CF2 and CH2 of PVDF copolymers and C=O and Cu-O of Fe-Cu-BTC. PXRD diffractogram detected typical 2? of Fe-Cu-BTC at 11,7o and PVDF copolymers at 2? = 18 and 20o. Incorporated MOF in nanofiber composite also showed enhancement in thermal stability. The variation of MOF concentrations 0,1, 1,0, and 5,0 %(w/v) in the nanofiber system produced unique morphology based on beads and entangled MOF particles on fibers. These characteristics affected tensile stress strength, hydrophobicity, and surface area. The adsorption of CO2 gas increased in MOF composited nanofiber, where the gas is adsorbed by MOF structure and the nanofiber system.