PRELIMINARY STUDY OF HYDROGEN STORAGE MATERIALS BASED Nb-BENZENE-1,4-DICARBOXYLIC COMPLEX

• Main Author: Suhiwa, Kokon
• Format: Theses
• Language: Indonesia
• Subjects: Kimia
• Online Access: https://digilib.itb.ac.id/gdl/view/34634
• Institution: Institut Teknologi Bandung

Hydrogen is an environmental friendly fuel because it produces water as combustion product. However, hydrogen consumptions typically on vehicles is relatively small. This is caused by the hydrogen storage technology as a light, inexpensive and safe fuel is very limited. In this research, it has been synthesized a metal organic frameworks (MOFs) of complex compounds based carboxylate which can be used as hydrogen storage. The MOFs was made of niobium (V) oxide (Nb2O5) and benzene-1,4-dicarboxylic acid (BDC) in dimethyl formamide (DMF) solvent. The Nb2O5 solution reacted with BDC solution in a solvothermal apparatus at 180oC for 20 hours. The mixture was filtered and the filtrate was evaporated slowly yield the yellowish powder. The product was characterized by X-ray diffraction (XRD) method, infra red spectrophotometry, and scanning electron microscopy (SEM). The X-ray diffraction results the sharp peaks diffractogram. This shows that the compound has a crystallinity. Refinement by Le Bail method of X-ray diffraction data indicates that the complex has similar crystal system with PCN-12 (PCN = porous coordination network) compound that possesses tetragonal shape with space group of P4/mmm, a = b = 32.868, c = 22.627, ? = ? = ? = 90o. The presence of carbonyl group and benzene ring has been proved by IR spectrum in which the stretching of C=O, C-H aromatic, and C=C aromatic at 1602.2 cm-1 and 1714.1 cm-1; 3105.1 cm-1; and 1402.7 cm-1 respectively. Analysis using SEM showed that the product has irregular cubic crystal, with a length of 40 ?m and 15 ?m wide.