Utilization of tea resources with the production of superparamagnetic biogenic iron oxide nanoparticles and an assessment of their antioxidant activities. (1st January 2021)

• Record Type: Journal Article
• Authors: Periakaruppan, Rajiv; Chen, Xuan; Thangaraj, Kuberan; Jeyaraj, Anburaj; Nguyen, Hoang Ha; Yu, Ying; Hu, Shunkai; Lu, Li; Li, Xinghui
• Is Part Of: Journal of cleaner production. Volume 278(2021)
• Publication Date: 2021-01-01
• Subjects: Biogenic iron oxide nanoparticles -- Superparamagnetic -- Antioxidant -- Waste of tea pruning -- HRTEM -- FESEM; Factory and trade waste -- Management -- Periodicals; Manufactures -- Environmental aspects -- Periodicals; Déchets industriels -- Gestion -- Périodiques; Usines -- Aspect de l'environnement -- Périodiques; 628.5
• DOI: 10.1016/j.jclepro.2020.123962
• Languages: English
• ISSNs: 0959-6526

Abstract

Abstract: An eco-friendly, low toxic and facile synthetic approach was employed to produce superparamagnetic biogenic iron oxide nanoparticles (SPBIONs) using an aqueous extract of tea-pruning waste as a reducing agent under alkaline conditions. As-biosynthesized SPBIONs were extensively characterized by various analytical tools. For instance, XRD pattern showed crystallinity and FTIR spectra revealed the presence of bioactive molecules required for the reduction of iron oxide ions. AFM and FESEM-EDX images showed agglomerated spherical shape with strong signals of iron metallic ions. The average crystallite sizes of SPBIONs were found to be 20–35 nm by HRTEM analysis. Zeta potential analysis confirmed that the surface charge of the green synthesized SPBIONs was highly negative (−25.2 mV) and stable. TGA curve reported a weight loss of 14%, which occurred in SPBIONs over temperatures ranging from 50 °C to 950 °C due to the removal of water molecules and volatile compounds. VSM analysis revealed that SPBIONs exhibited superparamagnetic properties with a high-saturation magnetization value of 11 emu/g. In addition, the antioxidant property of SPBIONs was investigated with 1, 1-Diphenyl-2-picrylhydrazyl (DPPH), a free radical assay, and it was seen that 70 μg/mL (IC50 ) of SPBIONs was able to neutralize the generation of free radicals and oxidative stress. The present study successfully demonstrated that utilization of tea resources for the production of SPBIONs with superparamagnetic and antioxidant properties might be used to design antioxidant agents and other biomedical applications. Graphical abstract: Image 1 Highlights: Aqueous-soluble phytochemicals act as capping, reducing and stabilizing agents. Iron oxide nanoparticles are characterized by modern spectroscopy techniques. Iron oxide nanoparticles are highly stable, spherical & crystalline in nature size. The efficacy of iron oxide nanoparticle as antioxidant agent was proved.