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      Antibacterial efficacy of green synthesized α-Fe 2O 3 nanoparticles using Sida cordifolia plant extract

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          Abstract

          The aim of the work is to synthesize iron oxide (α-Fe 2O 3) nanoparticles using Sida cordifolia plant extract along with evaluation of its antibacterial activity. The presence of phytochemicals in Sida cordifolia methanolic plant extract was investigated by HPTLC and LC-MS/TOF. The probable mechanism for formation of α-Fe 2O 3 nanoparticles in mediation with plant extract was demonstrated. The green synthesized iron oxide nanoparticles (α-Fe 2O 3 NPs) were characterized by using X-ray diffraction, scanning, and transmission electronic microscopy, TG-DTA, FTIR, and UV spectroscopy. The crystallite size of prepared α-Fe 2O 3 nanoparticles estimated via Debye-Scherrer formula and Williamson-Hall plot was around 20 nm which is in accordance with particle size in TEM images. The S. cordifolia mediated iron-oxide nanoparticles (α-Fe 2O 3 NPs) hold potent antibacterial activity against various gram positive and gram negative bacteria.

          Abstract

          Biotechnology; Microbiology; Nanotechnology; Nanomaterials; Materials property; Materials synthesis; Secondary metabolites; Green synthesis; Iron oxide; Antibacterial activity; S. cordifolia

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          Synthesis, characterization, applications, and challenges of iron oxide nanoparticles

          Attarad Ali, Hira Zafar, Muhammad Zia … (2016)
          Recently, iron oxide nanoparticles (NPs) have attracted much consideration due to their unique properties, such as superparamagnetism, surface-to-volume ratio, greater surface area, and easy separation methodology. Various physical, chemical, and biological methods have been adopted to synthesize magnetic NPs with suitable surface chemistry. This review summarizes the methods for the preparation of iron oxide NPs, size and morphology control, and magnetic properties with recent bioengineering, commercial, and industrial applications. Iron oxides exhibit great potential in the fields of life sciences such as biomedicine, agriculture, and environment. Nontoxic conduct and biocompatible applications of magnetic NPs can be enriched further by special surface coating with organic or inorganic molecules, including surfactants, drugs, proteins, starches, enzymes, antibodies, nucleotides, nonionic detergents, and polyelectrolytes. Magnetic NPs can also be directed to an organ, tissue, or tumor using an external magnetic field for hyperthermic treatment of patients. Keeping in mind the current interest in iron NPs, this review is designed to report recent information from synthesis to characterization, and applications of iron NPs.
          Article 0 comments Cited 223 times – based on 0 reviews     Review now
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            Biogenic Synthesis of Metallic Nanoparticles by Plant Extracts

            Mohd Sayeed Akhtar, Jitendra Panwar, Yeoung-Sang Yun (2013)
            Article 0 comments Cited 190 times – based on 0 reviews     Review now
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              Synthesis of hematite (alpha-Fe2O3) nanorods: diameter-size and shape effects on their applications in magnetism, lithium ion battery, and gas sensors.

              Yi Xie, Ping Yin, Xi-Chen Zhu … (2006)
              We demonstrated in this paper the shape-controlled synthesis of hematite (alpha-Fe(2)O(3)) nanostructures with a gradient in the diameters (from less than 20 nm to larger than 300 nm) and surface areas (from 5.9 to 52.3 m(2)/g) through an improved synthetic strategy by adopting a high concentration of inorganic salts and high temperature in the synthesis systems to influence the final products of hematite nanostructures. The benefits of the present work also stem from the first report on the <20-nm-diameter and porous hematite nanorods, as well as a new facile strategy to the less-than-20-nm nanorods, because the less-than-20-nm diameter size meets the vital size domain for magnetization properties in hematite. Note that the porous and nonporous hematite one-dimensional nanostructures with diameter gradients give us the first opportunity to investigate the Morin temperature evolution of nanorod diameter and porosity. Evidently, the magnetic properties for nanorods exhibit differences compared with those for the spherical particle counterparts. Hematite nanorods are strongly dependent on their diameter size and porosity, where the magnetization is not sensitive to the size evolution from submicron particles to the 60-90 nm nanorods, while the magnetic properties change significantly in the case of <20 nm. In other words, for the magnetic properties of nanorods, in a comparable size range, the porous existence could also influence the magnetic behavior. Moreover, applications in formaldehyde (HCHO) gas sensors and lithium batteries for the hematite nanostructures with the diameter/surface area gradient reveal that the performance of electrochemical and gas-sensor properties strongly depends on the diameter size and Brunauer-Emmett-Teller (BET) surface areas, which is consistent with the crystalline point of view. Thus, this work not only provides the first example of the fabrication of hematite nanostructure sensors for detecting HCHO gas, but also reveals that the surface area or diameter size of hematite nanorods can also influence the lithium intercalation performances. These results give us a guideline for the study of the size-dependent properties for functional materials as well as further applications for magnetic materials, lithium-ion batteries, and gas sensors.
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                Author and article information

                Contributors
                S.V.N. Pammi
                Journal
                Journal ID (nlm-ta): Heliyon
                Journal ID (iso-abbrev): Heliyon
                Title: Heliyon
                Publisher: Elsevier
                ISSN (Electronic): 2405-8440
                Publication date PMC-release: 22 November 2019
                Publication date Collection: November 2019
                Publication date (Electronic): 22 November 2019
                Volume: 5
                Issue: 11
                Electronic Location Identifier: e02765
                Affiliations
                [a ]Advanced Analytical Laboratory, Andhra University, Visakhapatnam, 530003, India
                [b ]Department of Zoology, Andhra University, Visakhapatnam, 530003, India
                [c ]Shri Vishnu College of Pharmacy, Bhimavaram, Andhra Pradhesh, 530041, India
                [d ]Department of Materials Science and Engineering, Chungnam National University, Daeduk Science Town, Daejeon, 305-764, Republic of Korea
                Author notes
                [∗ ]Corresponding author. sreepammi@ 123456gmail.com
                Article
                Publisher ID: S2405-8440(19)36425-4 Publisher ID: e02765
                DOI: 10.1016/j.heliyon.2019.e02765
                PMC ID: 6881625
                PubMed ID: 31799458
                SO-VID: af7d1bdb-d7b6-4071-93cc-3db892151e2d
                Copyright © © 2019 Published by Elsevier Ltd.
                License:

                This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

                History
                Date received : 28 November 2018
                Date revision received : 18 July 2019
                Date accepted : 30 October 2019
                Categories
                Subject: Article

                Keywords: biotechnology,microbiology,nanotechnology,nanomaterials,materials property,materials synthesis,secondary metabolites,green synthesis,iron oxide,antibacterial activity,s. cordifolia
                Data availability:
                Keywords: biotechnology, microbiology, nanotechnology, nanomaterials, materials property, materials synthesis, secondary metabolites, green synthesis, iron oxide, antibacterial activity, s. cordifolia

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