Document Type : Research Paper
Authors
Faculty of Chemistry, Bu-Ali Sina University, Hamedan, Iran
Abstract
Methylene blue (MB) is an organic dye that is widely used in various industries and have different adverse effects on the environment. Therefore, its removal is of great importance. In this respect, the performance of a recently synthesized schiff base network1 (SNW1) as an adsorbent for the removal of MB was scrutinized by DFT computations. For this purpose, the structures of MB, SNW1 and their complexes were optimized geometrically and the underwent infra-red (IR) calculations. All of the computations were done by density functional theory approach in the B3LYP/6-31G (d) level of theory. The obtained negative adsorption energies showed MB interaction with SNW1 is experimentally possible. The achieved negative values of Gibbs free energy changes and adsorption enthalpy changes revealed the MB adsorption process is exothermic and spontaneous. The positive values of entropy alterations and thermodynamic equilibrium constants demonstrated that the adsorption process of MB is thermodynamically possible and the chaos is increased in their interaction process.
Keywords
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