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Article

Synthesis, Electrochemical Studies, and Antimicrobial Properties of Fe3O4 Nanoparticles from Callistemon viminalis Plant Extracts

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Department of Chemistry, Faculty of Natural and Agricultural Sciences, North-West University (Mafikeng Campus), Private Bag X2046, Mmabatho 2735, South Africa
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Material Science Innovation and Modelling (MaSIM) Research Focus Area, Faculty of Natural and Agricultural Sciences, North-West University (Mafikeng Campus), Private Bag X2046, Mmabatho 2735, South Africa
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Center of Excellence for Research in Engineering Materials (CEREM), King Saud University, P.O. Box 800, Al-Riyadh 11421, Saudi Arabia
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Department of Physical Chemistry, Electrochemistry and Corrosion Laboratory, National Research Centre, El-Buhouth St., Dokki, Cairo 12622, Egypt
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Mechanical Engineering Department, College of Engineering, King Saud University, P.O. Box 800, Al-Riyadh 11421, Saudi Arabia
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Author to whom correspondence should be addressed.
Materials 2020, 13(21), 4894; https://doi.org/10.3390/ma13214894
Received: 6 July 2020 / Revised: 21 September 2020 / Accepted: 30 September 2020 / Published: 31 October 2020
Less toxic, environmentally safe green-mediated iron (III) oxide nanoparticles (Fe3O4-NP) synthesized using Callistemon viminalis (C. viminalis) leaf (Fe3O4-NPL) and flower (Fe3O4-NPF) extracts is reported in this work for the first time. Total flavonoids and phenols present in the plant extracts were determined. Characterization of the nanoparticles was carried out using Fourier transform infrared (FTIR) spectroscopy, ultraviolet–visible spectroscopy (UV–VIS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and Malvern zeta sizer. Other properties of the nanoparticles were investigated using the thermogravimetric analyser and cyclic voltammetry. The average particle sizes obtained for Fe3O4-NPL and Fe3O4-NPF were 17.91 nm and 27.93 nm, respectively. Fe3O4-NPL exhibited an excellent electrochemical activity when compared with Fe3O4-NPF based on a stability study using cyclic voltammetry and regression value. Additionally, Fe3O4-NPF displayed excellent antimicrobial activity against Bacillus cereus, Salmonella enteritidis, and Vibrio cholerae with zones of inhibition of 13, 15, and 25 mm, respectively. Simple, cheap, and less toxic green-mediated iron (III) oxide nanoparticles synthesized from C. viminalis leaf (Fe3O4-NPL) and flower (Fe3O4-NPF) extracts hold the potential of being used to control the activity of pathogenic bacteria of health importance and as an electrochemical sensor for both biological and environmental analytes. View Full-Text
Keywords: green-mediated; Fe3O4-NP; Callistemon viminalis; characterization; cyclic voltammetry; antimicrobial activity green-mediated; Fe3O4-NP; Callistemon viminalis; characterization; cyclic voltammetry; antimicrobial activity
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MDPI and ACS Style

Uwaya, G.E.; Fayemi, O.E.; Sherif, E.-S.M.; Junaedi, H.; Ebenso, E.E. Synthesis, Electrochemical Studies, and Antimicrobial Properties of Fe3O4 Nanoparticles from Callistemon viminalis Plant Extracts. Materials 2020, 13, 4894. https://doi.org/10.3390/ma13214894

AMA Style

Uwaya GE, Fayemi OE, Sherif E-SM, Junaedi H, Ebenso EE. Synthesis, Electrochemical Studies, and Antimicrobial Properties of Fe3O4 Nanoparticles from Callistemon viminalis Plant Extracts. Materials. 2020; 13(21):4894. https://doi.org/10.3390/ma13214894

Chicago/Turabian Style

Uwaya, Gloria E., Omolola E. Fayemi, El-Sayed M. Sherif, Harri Junaedi, and Eno E. Ebenso 2020. "Synthesis, Electrochemical Studies, and Antimicrobial Properties of Fe3O4 Nanoparticles from Callistemon viminalis Plant Extracts" Materials 13, no. 21: 4894. https://doi.org/10.3390/ma13214894

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