Synthesis and characterization of graphitic magnetic mesoporous nanocomposite and its application in dye adsorption

Abstract

A simple synthesis route has been developed to prepare pitch resin, which has been as carbon precursor to fabricate graphitic mesoporous carbon by a nanocasting process, and directly incorporating iron metal nitrates species as the magnetic particle precursors infiltrated into the mesoporous framework via two different approaches. The results of nitrogen adsorption-desorption showed a decrease in specific surface area and total volume with magnetic treatment. Comparison between the AB1 dye elimination with two magnetic nanocomposites was investigated. Experimental results showed that the adsorption capacities of the graphitic mesoporous carbons under the impregnation treatment (GMC-I) and the thermal treatment (GMC-II) modification nanoparticles for AB 1 dye were calculated to be 361.7 mg g−1 and 304.5 mg g−1, respectively. The results exhibited that the obtained magnetic mesoporous graphitic carbon nanocomposites can be used as efficient and recycled adsorbents for the removal of bulky dyes from any real sample. In additions, the data of kinetic was well fitted by pseudo second-order model, and the equilibrium adsorption isotherm data of dye onto the two magnetic GMC fitted by Langmuir isotherm model. The calculated thermodynamic parameters (ΔG, ΔH and ΔS) showed that the AB 1 dye adsorption onto the two nanocomposites was feasible, spontaneous and endothermic.