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Article

Cerium Oxide Nanoparticles and Their Efficient Antibacterial Application In Vitro against Gram-Positive and Gram-Negative Pathogens

1
Department of Food Science, University of Agricultural Science and Veterinary Medicine, 3-5 Calea Mănăştur Street, 400372 Cluj-Napoca, Romania
2
Physics and Chemistry Department, C4S Centre, Technical University of Cluj-Napoca, 28 Memorandumului Street, 400114 Cluj-Napoca, Romania
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Department of Pathology, University of Agricultural Science and Veterinary Medicine, 3-5 Calea Mănăştur Street, 400372 Cluj-Napoca, Romania
4
National Institute for Research and Development of Isotopic and Molecular Technologies, 65-103 Donath Street, 400293 Cluj-Napoca, Romania
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Faculty of Physics, Babeş-Bolyai University, 1st Kogălniceanu Street, 400084 Cluj-Napoca, Romania
*
Author to whom correspondence should be addressed.
Nanomaterials 2020, 10(8), 1614; https://doi.org/10.3390/nano10081614
Received: 25 June 2020 / Revised: 31 July 2020 / Accepted: 1 August 2020 / Published: 18 August 2020
(This article belongs to the Special Issue Antibacterial Activity of Nanoparticles)
In this study, the antibacterial activity of cerium oxide nanoparticles on two Gram-negative and three Gram-positive foodborne pathogens was investigated. CeO2 nanoparticles (CeO2 nps) were synthesized by a Wet Chemical Synthesis route, using the precipitation method and the Simultaneous Addition of reactants (WCS–SimAdd). The as-obtained precursor powders were investigated by thermal analysis (TG–DTA), to study their decomposition process and to understand the CeO2 nps formation. The composition, structure, and morphology of the thermally treated sample were investigated by FTIR, Raman spectroscopy, X-ray diffraction, TEM, and DLS. The cubic structure and average particle size ranging between 5 and 15 nm were evidenced. Optical absorption measurements (UV–Vis) reveal that the band gap of CeO2 is 2.61 eV, which is smaller than the band gap of bulk ceria. The antioxidant effect of CeO2 nps was determined, and the antibacterial test was carried out both in liquid and on solid growth media against five pathogenic microorganisms, namely Escherichia coli, Salmonella typhimurium, Listeria monocytogenes, Staphylococcus aureus, and Bacillus cereus. Cerium oxide nanoparticles showed growth inhibition toward all five pathogens tested with notable results. This paper highlights the perspectives for the synthesis of CeO2 nps with controlled structural and morphological characteristics and enhanced antibacterial properties, using a versatile and low-cost chemical solution method. View Full-Text
Keywords: antibacterial activity; antioxidant activity; cerium oxide nanoparticles; foodborne pathogens antibacterial activity; antioxidant activity; cerium oxide nanoparticles; foodborne pathogens
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MDPI and ACS Style

Pop, O.L.; Mesaros, A.; Vodnar, D.C.; Suharoschi, R.; Tăbăran, F.; Magerușan, L.; Tódor, I.S.; Diaconeasa, Z.; Balint, A.; Ciontea, L.; Socaciu, C. Cerium Oxide Nanoparticles and Their Efficient Antibacterial Application In Vitro against Gram-Positive and Gram-Negative Pathogens. Nanomaterials 2020, 10, 1614. https://doi.org/10.3390/nano10081614

AMA Style

Pop OL, Mesaros A, Vodnar DC, Suharoschi R, Tăbăran F, Magerușan L, Tódor IS, Diaconeasa Z, Balint A, Ciontea L, Socaciu C. Cerium Oxide Nanoparticles and Their Efficient Antibacterial Application In Vitro against Gram-Positive and Gram-Negative Pathogens. Nanomaterials. 2020; 10(8):1614. https://doi.org/10.3390/nano10081614

Chicago/Turabian Style

Pop, Oana L., Amalia Mesaros, Dan C. Vodnar, Ramona Suharoschi, Flaviu Tăbăran, Lidia Magerușan, István S. Tódor, Zoriţa Diaconeasa, Adriana Balint, Lelia Ciontea, and Carmen Socaciu. 2020. "Cerium Oxide Nanoparticles and Their Efficient Antibacterial Application In Vitro against Gram-Positive and Gram-Negative Pathogens" Nanomaterials 10, no. 8: 1614. https://doi.org/10.3390/nano10081614

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