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Eco-Friendly and Systematic Study for Synthesis of La3+/α-Al2O3 Nanoparticles: Antibacterial Activity Against Pathogenic Microbial Strains

Authors Moshafi MH, Ranjbar M, Ilbeigi G

Received 11 May 2019

Accepted for publication 18 September 2019

Published 30 December 2019 Volume 2019:14 Pages 10137—10146


Checked for plagiarism Yes

Review by Single anonymous peer review

Peer reviewer comments 4

Editor who approved publication: Prof. Dr. Anderson Oliveira Lobo

Mohammad Hasan Moshafi,1 Mehdi Ranjbar,2,3 Ghazaleh Ilbeigi4

1Neuroscience Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran; 2Food Drug and Cosmetics Safety Research Center Kerman University of Medical Sciences, Kerman, Iran; 3Pharmaceutics Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran; 4Student Research Committee, Kerman University of Medical Sciences, Kerman, Iran

Correspondence: Mehdi Ranjbar
Pharmaceutics Research Center, Kerman University of Medical Sciences, P.O. Box: 76175-493, Kerman 76169-11319, Iran
Tel +98-34-31325241
Fax +98-34-31325003

Purpose: In this study, for the first time, new nanoparticles of La3+/α-Al2O3 were synthesized with the ultrasonic-assisted hydrothermal method in the presence of honey as an eco-friendly and natural reagent.
Methods: The as-synthesized La3+/α-Al2O3 nanoparticles were characterized using scanning electron microscopy (SEM), transition electron microscopy (TEM), X-ray diffraction spectroscopy (XRD), energy dispersive X-ray (EDX), UV–visible spectroscopy, and Fourier transform infrared spectroscopy (FTIR) techniques. In this work, we report optimum conditions to synthesize La3+/α-Al2O3 nanoparticles as novel material and as a candidate for antibacterial activity in antibacterial drugs.
Results and Conclusion: The XRD and SEM micrograph results demonstrate the formation of pure La3+/α-Al2O3 nanoparticles with a particle size in the range of 30–80 nm. The synthesis parameters were systematically examined using analysis of variance (ANOVA) through 2k−1 factorial design, and the factors were an assay for product optimization. Various factors such as hydrothermal time, temperature, ultrasound irradiation and interaction between these factors were investigated on the product size of the products. To investigate antibacterial activity of the La3+/α-Al2O3 nanoparticles with the minimum inhibitory concentration (MIC) method, different dilutions of nanoparticles as 64, 32, 16, 8, 4, 2, 1 and 0.5 μg/mL were dissolved in dimethyl sulfoxide and diluted using distilled water and added to the Mueller-Hinton agar medium containing Escherichia coli, Klebsiella pneumonia, Pseudomonas aeruginosa and Serratia marcescens as gram-negative bacteria and Bacillus subtilis, Staphylococcus aureus, S. epidermidis and Micrococcus luteus as gram-positive bacteria.

Keywords: ultrasound-assisted hydrothermal method, antibacterial activity, La3+/α-Al2O3 NPs, nanocomposites

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