Open AccessAlkali-cation-incorporated and functionalized iron oxide nanoparticles for methyl blue removal/decomposition
Author(s) -
N. Joseph Singh,
Boris Wareppam,
Subrata Ghosh,
Basudeb Sahu,
P.K. Ajikumar,
Haridwar Singh,
Soumee Chakraborty,
S. S. Pati,
Aylson Costa Oliveira,
Suelen Barg,
V. K. Garg,
L. Herojit Singh
Publication year - 2020
Publication title -
nanotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.926
H-Index - 203
eISSN - 1361-6528
pISSN - 0957-4484
DOI - 10.1088/1361-6528/ab9af1
Subject(s) - adsorption , alkali metal , materials science , decomposition , hydroxide , nanoparticle , inorganic chemistry , kinetics , oxide , chemical engineering , iron oxide nanoparticles , iron oxide , chloride , nanotechnology , organic chemistry , chemistry , physics , quantum mechanics , engineering , metallurgy
Enhancing the rate of decomposition or removal of organic dye by designing novel nanostructures is a subject of intensive research aimed at improving waste-water treatment in the textile and pharmaceutical industries. Despite radical progress in this challenging area using iron-based nanostructures, enhancing stability and dye adsorption performance is highly desirable. In the present manuscript alkali cations are incorporated into iron oxide nanoparticles (IONPs) to tailor their structural and magnetic properties and to magnify methyl blue (MB) removal/decomposition capability. The process automatically functionalizes the IONPs without any additional steps. The plausible mechanisms proposed for IONPs incubated in alkali chloride and hydroxide solutions are based on structural investigation and correlated with the removal/adsorption capabilities. The MB adsorption kinetics of the incubated IONPs is elucidated by the pseudo second-order reaction model. Not only are the functional groups of –OH and –Cl attached to the surface of the NPs, the present investigation also reveals that the presence of alkali cations significantly influences the MB adsorption kinetics and correlates with the cation content and atomic polarizability.