Green synthesis of mesoporous 2D Mn2O3/rGO nanocomposite for effective removal of methyl orange

Abstract

Green synthesis of di-manganese trioxide mesoporous structure (super nano porous) sheets (Mn2O3-rGO-NS), Graphene oxide nano sheets (GO) and Mn2O3-rGO-NS nano sheets composite (Mn2O3-rGO-NS) were prepared via Thermal decomposition, seconds timescale water electrolytic oxidation and sonication method respectively. The prepared samples were characterized via X-ray diffraction, FESEM, TEM , and FTIR. Average crystallite size was found about 38 and 26 nm for Mn2O3-NS and Mn2O3-rGO-NS, respectively. Mn2O3-rGO–NPs morphology reveal nano porous sheets within average 35 nm and 26 nm in pores diameter and thickness respectively. Mn2O3-NS act distributed on and between graphene sheets creating macro and nano pores. The obtained results showed that the characteristics of the α-Mn2O3-rGO-NS sheets were improved by the addition of rGO sheets. Methyl orange (MO) dye adsorption onto Mn2O3-rGO-NS composite was investigated at various adsorption parameters, including pH, adsorbent quantity, and time. It was discovered that the adsorption behavior complies with the intra-particle diffusion model and the Friedendlich isotherm. Methyl orange in aqueous media may be eliminated 99.3% by Mn2O3-rGO-NS composite. HIGHLIGHTS Mesoporous graphene-based composite synthesis for dye removal from aqueous media with high efficiency and capacity. According to thermodynamics and kinetics adsorption is favorable, which opens up the possibility for further trials on various types of pollutant removal studies for the industry.;

Keywords

• α-mn2o3
• 2d nanostructure
• manganese oxide
• meso-porous
• methyl orange dye removal
• reduced graphene oxide composite