Enhanced adsorption removal of methyl orange from aqueous solution by nanostructured proton-containing δ-MnO2

摘要: Two nanostructured proton-containing δ-MnO2 (H-δ-MnO2) materials were synthesized through proton exchange for K-containing (K-δ-MnO2) nanosheets and nanoparticles prepared by the hydrothermal homogeneous precipitation method solid-state reaction. Energy-dispersive spectroscopy (EDS) measurements showed that K+ cations successfully leached away replaced with H+ ions. The role of in adsorption process was first explored replacing ions capacities organic pollutants investigated using methyl orange (MO) as a model. Experimental results indicated H-δ-MnO2 similar morphology crystal structure excellent 375 427 mg g−1 MO, because both have much larger Brunauer–Emmett–Teller (BET) surface areas than K-δ-MnO2. remarkable dye onto indicate layered an unfavorable influence on process. Moreover, physical mechanisms including electrostatic interaction play dominant mechanism between MO adsorbents. This finding suggests proton-exchange may be useful to improve affinity contaminants samples are good candidates efficient removal from wastewater.