Greener synthesis of MNPs using Achyranthesaspera leaf extract: compared photocatalytic activity, reduction, and adsorption investigations for the environmental remediation
- Department of chemistry, Rani channamma University, Belagavi, Karnataka, 591156, India
Received: 2025-04-30
Revised: 2025-06-17
Accepted: 2025-07-10
Published in Issue 2025-12-31
Published Online: 2025-11-05
Copyright (c) 2025 Raju Shekhanavar, Kantharaju Kamanna (Author)

This work is licensed under a Creative Commons Attribution 4.0 International License.
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Abstract
A greener method described using water extract leaves of Achyranthesaspera plant (Uttarani plant) employed for iron oxide nanoparticles (MNPs) preparation, and demonstrated application of the prepared NPs for dye removal from the contaminated water by photo chemically. The Achyranthes aspera leaves were used for the first time for the iron oxide NPs preparation as a biogenic method. The phytochemical present in the extracted solution served as a reducing agent, facilitating NPs formation. The prepared MNPs homogeneity was examined by FT-IR, UV-Vis, XRD, HR-SEM, and VSM analyses. Further, these MNPs were utilized for the decolourization of the industrial effluent (IE) and methylene blue (MB), and the catalytic reduction properties of 4-NA to 4-AA were evaluated. The decolourization of the MB and IE was monitored by UV-Vis, and followed by kinetic comparisons and HR-MS analysis, which revealed that adsorption takes place on the surface.
Highlights
· Novel greener method synthesis of magnetic nanoparticle described.
· Prepared MNPs could decolorize MB and Industrial effluent dyes in the presence of sunlight.
· Experimentally proved, the processes of adsorption of the dye take place on MNPs.
· Also studied prepared MNPs can be used for the reduction of 4-nitroaniline to 4-amino aniline.
· The prepared MNPs system revealed potential for the removal of MB and textile dye effluent.
Keywords
- Iron oxide,
- Magnetic nanoparticles,
- Achyranthesaspera,
- Leaf extract,
- Industrial effluent,
- Methylene blue
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10.57647/j.ijc.2025.1504.40
