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      Nickel-Doped Cerium Oxide Nanoparticles: Green Synthesis Using Stevia and Protective Effect against Harmful Ultraviolet Rays

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          Abstract

          Nanoparticles of cerium oxide CeO 2 are important nanomaterials with remarkable properties for use in both industrial and non-industrial fields. In a general way, doping of oxide nanometric with transition metals improves the properties of nanoparticles. In this study, nickel- doped cerium oxide nanoparticles were synthesized from Stevia rebaudiana extract. Both doped and non-doped nanoparticles were characterized by X-ray diffraction, Field Emission Scanning Electron Microscopy, Energy Dispersive X-ray, Raman spectroscopy, and Vibrating-Sample Magnetometry analysis. According to X-ray diffraction, Raman and Energy Dispersive X-ray crystalline and single phase of CeO 2 and Ni doped CeO 2 nanoparticles exhibiting fluorite structure with F2g mode were synthesized. Field Emission Scanning Electron Microscopy shows that CeO 2 and Ni doped nanoparticles have spherical shape and sizes ranging of 8 to 10 nm. Ni doping of CeO 2 results in an increasing of magnetic properties. The enhancement of ultraviolet protector character via Ni doping of CeO 2 is also discussed.

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          Magnetism in hafnium dioxide

          L. S. Dorneles, C. Fitzgerald, J. Coey … (2005)
          Article 0 comments Cited 70 times – based on 0 reviews     Review now
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            Ferromagnetism as a universal feature of nanoparticles of the otherwise nonmagnetic oxides

            A Sundaresan, R. Bhargavi, N. Rangarajan … (2006)
            Article 0 comments Cited 65 times – based on 0 reviews     Review now
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              The effects of bacteria-nanoparticles interface on the antibacterial activity of green synthesized silver nanoparticles.

              Aftab Ahmad, Yun Wei, Fatima Syed … (2017)
              Neutralization of bacterial cell surface potential using nanoscale materials is an effective strategy to alter membrane permeability, cytoplasmic leakage, and ultimate cell death. In the present study, an attempt was made to prepare biogenic silver nanoparticles using biomolecules from the aqueous rhizome extract of Coptis Chinensis. The biosynthesized silver nanoparticles were surface modified with chitosan biopolymer. The prepared silver nanoparticles and chitosan modified silver nanoparticles were cubic crystalline structures (XRD) with an average particle size of 15 and 20 nm respectively (TEM, DLS). The biosynthesized silver nanoparticles were surface stabilized by polyphenolic compounds (FTIR). Coptis Chinensis mediated silver nanoparticles displayed significant activity against E. coli and Bacillus subtilus with a zone of inhibition 12 ± 1.2 (MIC = 25 μg/mL) and 18 ± 1.6 mm (MIC = 12.50 μg/mL) respectively. The bactericidal efficacy of these nanoparticles was considerably increased upon surface modification with chitosan biopolymer. The chitosan modified biogenic silver nanoparticles exhibited promising activity against E. coli (MIC = 6.25 μg/mL) and Bacillus subtilus (MIC = 12.50 μg/mL). Our results indicated that the chitosan modified silver nanoparticles were promising agents in damaging bacterial membrane potential and induction of high level of intracellular reactive oxygen species (ROS). In addition, these nanoparticles were observed to induce the release of the high level of cytoplasmic materials especially protein and nucleic acids into the media. All these findings suggest that the chitosan functionalized silver nanoparticles are efficient agents in disrupting bacterial membrane and induction of ROS leading to cytoplasmic leakage and cell death. These findings further conclude that the bacterial-nanoparticles surface potential modulation is an effective strategy in enhancing the antibacterial potency of silver nanoparticles.
              Article 0 comments Cited 61 times – based on 0 reviews     Review now
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                Author and article information

                Contributors
                Francesco Baino: Role: Academic Editor
                Saeid Kargozar: Role: Academic Editor
                Journal
                Journal ID (nlm-ta): Molecules
                Journal ID (iso-abbrev): Molecules
                Journal ID (publisher-id): molecules
                Title: Molecules
                Publisher: MDPI
                ISSN (Electronic): 1420-3049
                Publication date (Electronic): 04 December 2019
                Publication date Collection: December 2019
                Volume: 24
                Issue: 24
                Electronic Location Identifier: 4424
                Affiliations
                [1 ]NanoBioEletrochemistry Research Center, Bam University of Medical Sciences, Bam 76617-71967, Iran; mehrdad7khatami@ 123456gmail.com (M.K.); minasarani64@ 123456gmail.com (M.S.); mmrr1366@ 123456yahoo.com (M.R.)
                [2 ]Cell Therapy and Regenerative Medicine Comprehensive Center, Kerman University of Medical Sciences, Kerman 7618747653, Iran
                [3 ]Students Research Committee, School of Public Health, Bam University of Medical Sciences, Bam 76617-71967, Iran; f.mousazadeh7@ 123456gmail.com
                [4 ]Department of Medical Parasitology and Mycology, School of Public Health, Tehran University of Medical Sciences, Tehran 14167-53955, Iran; alirezaizadi81@ 123456yahoo.com
                [5 ]Cellular and Molecular Biology Research Center, Larestan University of Medical Sciences, Larestan 74319-75566, Iran; abdollahpour1983@ 123456yahoo.com
                [6 ]School of Technology and Sciences, São Paulo State University (Unesp), Presidente Prudente-SP 19060-900, Brazil; marcos.nobre@ 123456unesp.br
                [7 ]Medical Ethics and Law Research Center, Shahid Beheshti University of Medical Sciences, Tehran 19857-17443, Iran
                Author notes
                [* ]Correspondence: faribaborhani@ 123456msn.com ; Tel.: +98-344-421-9074
                Author information
                https://orcid.org/0000-0002-7519-6998
                https://orcid.org/0000-0002-5260-2527
                Article
                Publisher ID: molecules-24-04424
                DOI: 10.3390/molecules24244424
                PMC ID: 6943421
                PubMed ID: 31817060
                SO-VID: 903f54f6-547d-4905-ac50-33e8c40b62ae
                Copyright © © 2019 by the authors.
                License:

                Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( http://creativecommons.org/licenses/by/4.0/).

                History
                Date received : 05 October 2019
                Date accepted : 18 November 2019
                Categories
                Subject: Article

                Keywords: ni-doped ceo2 nanoparticles,stevia rebaudiana,uv protection,vsm
                Data availability:
                Keywords: ni-doped ceo2 nanoparticles, stevia rebaudiana, uv protection, vsm

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