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Sphere-like Mn2O3 nanoparticles: Facile hydrothermal synthesis and adsorption properties
Journal of the Taiwan Institute of Chemical Engineers • 2016
Publication Information
Authors
Mostafa Y. Nassar, Alaa S. Amin , Ibrahim S. Ahmed , Samar Abdallah
Keywords
Hydrothermal synthesis; Ammonium carbonate; Manganese carbonate; Mn2O3 nanostructures; Reactive Black 5 dye; Adsorption properties.
Journal
Journal of the Taiwan Institute of Chemical Engineers
Publisher
Elsevier
Volume
Not Available
Issue
Not Available
Pages
doi:10.1016/j.jtice.2016.03.041
publication.type
International
Paper Link
Open Link
Supplementary Materials
Not Available
Abstract
Thermal decomposition of the hydrothermally prepared MnCO3 produced pure Mn2O3 nanoparticles with 23 nm crystallite size. The products were characterized and the adsorption properties of Mn2O3 adsorbent were investigated using Reactive Black 5 dye. Thence, some factors affecting the adsorption process were
studied and the results exhibited good adsorption capacity ( qm = 14.6 mg/g) of the adsorbent and the percent dye removal reached 92% in 40 min. Additionally, the kinetics, thermodynamics, and isotherms of the adsorption were investigated. The Langmuir model fitted the adsorption data. The adsorption process followed pseudo-second-order kinetic model. The adsorption of the dye on Mn2O3 adsorbent is an
endothermic ( H º= 44.52 kJ/mol) and spontaneous ( G º= –21.63 kJ/mol) process.
studied and the results exhibited good adsorption capacity ( qm = 14.6 mg/g) of the adsorbent and the percent dye removal reached 92% in 40 min. Additionally, the kinetics, thermodynamics, and isotherms of the adsorption were investigated. The Langmuir model fitted the adsorption data. The adsorption process followed pseudo-second-order kinetic model. The adsorption of the dye on Mn2O3 adsorbent is an
endothermic ( H º= 44.52 kJ/mol) and spontaneous ( G º= –21.63 kJ/mol) process.