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Prof. Mostafa Yassin Mohamed Yassin Nassar :: Publications:

Sphere-like Mn2O3 nanoparticles: Facile hydrothermal synthesis and adsorption properties
Authors: Mostafa Y. Nassar, Alaa S. Amin , Ibrahim S. Ahmed , Samar Abdallah
Year: 2016
Keywords: Hydrothermal synthesis; Ammonium carbonate; Manganese carbonate; Mn2O3 nanostructures; Reactive Black 5 dye; Adsorption properties.
Journal: Journal of the Taiwan Institute of Chemical Engineers
Volume: Not Available
Issue: Not Available
Pages: doi:10.1016/j.jtice.2016.03.041
Publisher: Elsevier
Local/International: International
Paper Link:
Full paper Mostafa Yassin Mohamed Yassin Nassar_Mn2O3 J of the Taiwan Institute of chemical engineers.pdf
Supplementary materials Not Available

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.

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