Synthesis, properties and appplication of silver carbonate carbon graphite/graphene oxide nanocomposite for methyl orange degradation

Abstract

This paper examined the absorption of methyl orange dye by three graphite nitrides, graphene oxide, and silver carbonate nanocomposites. The absorption of methyl orange dye solution at 465 nm wavelength was checked by UV-VIS to determine the initial and final dye. The results showed that in different cases with increasing contact time, the amount of methyl orange absorbed per unit weight of the absorbent increased, and the absorption process was completed in different stages at different times. The maximum absorption efficiency was obtained at 15 ppm (equal to 92.5%).

In this study, the effects of initial dye concentration, adsorbent dosage, pH, and contact time on the adsorption process were investigated. The optimal conditions for maximum adsorption capacity were determined to be at pH 3, an adsorbent dosage of 0.02 g/L, an initial methyl orange concentration of 15 ppm, and an equilibrium contact time of 25 minutes. Under these conditions, the experimental data were best fitted by the pseudo-second-order kinetic model. For equilibrium studies, the Langmuir and Freundlich isotherm models were applied. The adsorption data showed a better fit with the Langmuir model, indicating monolayer adsorption of methyl orange on the adsorbent surface. The ternary nanocomposite GO / AC / CN was synthesized through a simple method of chemical precipitation in the environment. The mentioned nanocomposites underwent physical tests by X-ray diffraction (XRD), energy dispersive x-ray spectroscopy (EDX), Fourier transform infrared (FTIR), XRD device, and scanning electron microscope (SEM) to determine the structural properties, surface compositions, properties and morphology following synthesis