Application of Factorial Experimental Design for Optimization of Methyl Orange Photo‐Degradation Using a Microporous Metal Organic Framework

ABSTRACT This study aimed to evaluate the effectiveness of the Metal‐Organic Framework 5 (MOF‐5) in efficiently removing Methyl Orange (MO) from wastewater by photocatalysis. MOF‐5 was synthesized by a faster and environmentally friendly route. The crystal structure of MOF‐5 was confirmed by SEM analysis, whose size ranges from 5 to 45 nm. Diffuse reflectance UV/Vis spectroscopy exhibits an optical gap (E g ) of 3.55 eV, indirectly allowed. The photo‐degradation kinetics show significant removal at low concentrations and decrease at high concentrations (> 50 mg L −1 ). Finally, the optimization of photo‐degradation by combining six parameters. A Plackett‐Burman Design (PBD) was used to identify the important factors influencing the MO adsorption on MOF‐5, three factors have a significant effect on the adsorption process, namely MO concentration, catalyst dosage Solide/Liquid (S/L) ratio and S 2 O 8 2− (PS) optimized by using the Box‐Behnken Design (BBD) and Response Surface Method (RSM). The maximum photo‐degradation rate for MO removal on MOFS‐5 reached 97.8% and was optimized for a catalyst dose (S/L = 0.465 g/L), MO concentration of 56.67 g/L and S 2 O 8 2− amount of 4.93 mM.