Amine-Functionalized and Hydroxyl-Functionalized Magnesium Ferrite Nanoparticles for Congo Red Adsorption

By Chattharika Aoopngan, J. Nonkumwong, S. Phumying, Wilasinee Promjantuek, S. Maensiri, Parinya Noisa, S. Pinitsoontorn, S. Ananta, L. Srisombat. ACS Applied Nano Materials, 2019

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In this paper, the potential use of either amine-functionalized or hydroxyl-functionalized magnesium ferrite (MgFe2O4) nanoparticles (NPs) as Congo red nanoadsorbents is explored and compared. The amine-functionalized MgFe2O4 NPs (denoted as MgFe2O4–NH2 NPs) were synthesized by a one-pot coprecipitation method using ethanolamine as a surface modifier, while the hydroxyl-functionalized MgFe2O4 NPs (denoted as MgFe2O4–OH NPs) were prepared by a hydrothermal method. In general, both nanoadsorbents can be successfully produced without calcination and were found to possess superparamagnetic properties with high saturation magnetization (Ms). In particular, MgFe2O4–OH NPs exhibit a higher Ms value of ∼53 emu g–1, promoting the rapid separation ability of the NPs from the treated solution using an external permanent magnet. The Congo red removal performance of these nanoadsorbents was investigated as a function of the pH of the aqueous solution and contact time. The removal efficiency of Congo red by MgFe2O4–NH2...

Subfields: Materials Chemistry, Organic Chemistry, Water Science and Technology

View Paper: https://www.semanticscholar.org/paper/a4bb4da7a4cb28282ad6aefc546f077c3192a068