Investigation on photocatalytic activity of bio-treated α-Fe2O3 nanoparticles using Phyllanthus niruri and Moringa stenopetala leaf extract against methylene blue and phenol molecules: Kinetics, mechanism and stability. Issue 1 (February 2021)

• Record Type: Journal Article
• Authors: Haseena, S.; Shanavas, S.; Ahamad, T.; Alshehri, S.M.; Baskaran, P.; Duraimurugan, J.; Acevedo, R.; Khan, M.A. Majeed; Anbarasan, P.M.; Jayamani, N.
• Is Part Of: Journal of environmental chemical engineering. Volume 9:Issue 1(2021)
• Publication Date: 2021-02
• Subjects: α-Fe2O3 -- Phyllanthus niruri -- Moringa stenopetala -- Photocatalytic activity -- Methylene blue -- Phenol; Chemical engineering -- Environmental aspects -- Periodicals; Environmental engineering -- Periodicals; Chemical engineering -- Environmental aspects; Environmental engineering; Periodicals; 660.0286
• DOI: 10.1016/j.jece.2020.104996
• Languages: English
• ISSNs: 2213-2929

Abstract

Abstract: In this article, Bio-treatment of α-Fe2 O3 nanostructure using Phyllanthus niruri and Moringa stenopetala leaf extract as an effective reducing agent is carried out. The preparation of the rhombohedral α-Fe2 O3 nanostructure is confirmed using X-ray diffraction analysis. The adsorption of biomolecules on the surface of the α-Fe2 O3 nanostructure is confirmed using FT-IR. The chemical state analysis of green treated α-Fe2 O3 nanoparticles was carried out using XPS techniques and it confirms the existence of Fe-2p and O-1s elements. The surface area of Moringa stenopetala leaf extract treated α-Fe2 O3 nanoparticles were identified using BET analysis and it is found to be 58 m 2 /g. The formation of spherical shaped α-Fe2 O3 nanoparticles was identified using HR-TEM analysis and EDX reveals the absence of any other impurities. The reactive species trapping experiment confirms the rapid production of O2 - and OH radicals during photocatalytic process. The degradation efficiency of PNFO and MSFO against MB after 180 min was estimated to be 92% and 96%, respectively. The degradation efficiency of PNFO and MSFO against phenol after 240 min was estimated to be 90% and 92%, respectively. Graphical Abstract: ga1 Highlights: The successful synthesis of α-Fe2 O3 nanoparticles using Phyllanthus niruri and Moringa stenopetala leaf extract. The formation of nanoparticles is confirmed using XRD, Raman and BET analysis. The photocatalytic degradation ability of nanostructures were examined using MB and Phenol molecules. The reactive species trapping experiment confirms production of O2 - and OH radicals. The photocatalytic mechanism of nanostructures were studied using band edge position calculation.