Synthesis, structural characterization and adsorption capacity of H-δ-MnO2
Abstract
The H-δ-MnO2 material was synthesized through proton exchange for K-containing δ-MnO2 (K-δ-MnO2) nanoparticles prepared by solid-state reaction. The obtained materials were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS),transmission electron microscopy (TEM), and nitrogen adsorption−desorption measurements (BET). The effects of contact time, initial pH, adsorbent dosage and initial concentration of dye were investigated. The adsorption of methylene blue (MB) as a model organic pollutant on the obtained material, is also followed by Langmuir and Freundlich adsorption isotherm. The high adsorption capacity of H-δ-MnO2 for MB (qmax = 185.5 mg/g) shows this material can be used as an effective adsorbent for dye wastewater treatment.
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