A novel nanohybrid based on metal-organic framework MIL101-Cr/PANI/Ag for the adsorption of cationic methylene blue dye from aqueous solution

In this study, a novel MIL101-Cr/PANI/Ag nanohybrid was synthesized based on a Chromium-based metal-organic framework (MOF) prepared by a hydrothermal method and structurally characterized using various techniques such as FE-SEM, XRD, FT-IR, EDAX, BET, and TEM analyzes. The nanohybrid exhibited active performance due to changes in the UV-Vis absorbencies of the aqueous solutions at lambda max = 662 nm. MB adsorption over MOF-based composites follows pseudo-second-order kinetics. The influence of various operational parameters such as MIL101-Cr/PANI/Ag mass (20, 30 and 40) 10(-4) g, initial dye concentration (15, 25, 35 and 50 mg L-1), pH (2-12) and temperature (25-55 degrees C ) were investigated. The findings showed that size of the MIL101-Cr/PANI/Ag nanohybrid was 153 nm. The total pore volume, BET surface area, and Langmuir surface area were found to be 2861 m(2)/g, and 1.608 m(3) g(-1), respectively. Zeta potential of MIL101-Cr/PANI and MIL101-Cr/PANI/Ag was equal to -3.8 V and -39.5 V. efficiency was observed for MB adsorption, at the pH = 12, Methylene blue was 25 mg L-1, MIL101-Cr/PANI/Ag was 0.03 g and the temperature of 25 degrees C which led to 96% methylene blue adsorption. (C) 2021 Elsevier B.V. All rights reserved.