Alkali-cation-incorporated and functionalized iron oxide nanoparticles for methyl blue removal/decomposition

Abstract

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.

Photocatalytic degradation of methyl blue dye with H2O2 sensing

“…There are few reports available on the nanoparticle-based degradation of MB. [25][26][27][28][29][30][31][32][33][34] Polymer-capped nanoparticles for MB elimination are not available in the literature.…”

Overview of Iron-Coated Dynamic Membrane for Water Treatment

“…This inherent flexibility is not only appealing but also held in high regard, as it imparts adaptability to its application in water treatment, aligning seamlessly with the dynamic nature of waterborne pollutants. For instance, Singh et al (Singh et al, 2020) highlighted the utilization of alkali cations to functionalize iron oxide NPs, enabling the treatment of textile and pharmaceutical wastewater.…”

Probing the structural transformation of ZIF-L to ZnO for sustainable congo red dye removal

“…In this backdrop, various methods like ozonation, photocatalysis, adsorption, chemical precipitation, membrane filtration, thermal treatment, flocculation/coagulation, biodegradation etc have been widely used to remove organic pollutants from wastewater [6][7][8]. Among these techniques, adsorption technique is considered to be the most suitable and workable water treatment method, owing to its easy applicability, environmentfriendliness, cost-effectiveness and good efficiency.…”