Study of Adsorption of Orange G and Malachite Green on the Surface of Znfe2o4-PANI Nanocomposite Prepared by in-Situ Polymerization Method

Abstract

ZnFe2O4 Nanoparticles were synthesized using a Co-precipitation method and impregnating ZnFe2O4 Nanoparticles onto polyaniline (PANI) by in-situ polymerization under ultrasonic fields. Used X-ray diffraction (XRD), Field Emission Scanning Electron Microscope (FE-SEM), Vibrating-Sample Magnetometer (VSM), Surface area analysis (BET, BJH), Fourier Transform Infrared Spectroscopy (FT-IR), Atomic Force Microscope (AFM), and Thermal Gravimetric Analysis (TGA) were used to characterize the magnetic nanocomposite of (PANI-ZnFe2O4). The FTIR Spectroscopy exhibits the emergence and shifts in the main bands and average crystal sizes of nanocomposite materials (26.39 nm) for PANI-ZnFe2O4 are different from ZnFe2O4. Additionally, The ZnFe2O4 Nanoparticles are homogeneously dispersed throughout the PANI matrix, according to the AFM and FE-SEM images. The thermodynamic study concluded that the adsorption of both dyes was spontaneous in nature and exothermic. The adsorption pursued pseudo-second-order kinetics. In addition, the isotherm models Freundlich, Langmuir, and Timken were used to model the experimental adsorption data. To match the experimental isotherm, the Langmuir isotherm was employed.