Synthesis, characterization and magnetic properties of hematite (α-Fe2O3) nanoparticles on polysaccharide templates and their antibacterial activity

Rafi, M. Mohamed; Ahmed, K. Syed Zameer; Nazeer, K. Prem; Kumar, D. B. Aruna; Thamilselvan, M.

doi:10.1007/s13204-014-0344-z

Cited by 83 publications

(42 citation statements)

References 26 publications

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“…Even rarer are the studies comparing different biopolymers such as that on the preparation of ¡-Fe 2 O 3 in the presence of either dextran, agarose and gelatin where small differences in morphology and size are observed, but significantly different magnetic properties are identified. 61) MO@Cellulose Hybrid Materials. Cellulose, with polymeric chains made of ¢(1¼4) linked D-glucose units is the most popular polysaccharide, found in living organisms from bacteria to animals, and plant (Fig.…”

Section: Sol-gel Processmentioning

confidence: 99%

Hybrid metal oxide@biopolymer materials precursors of metal oxides and metal oxide-carbon composites

Plumejeau

Alauzun

Boury

2015

J. Ceram. Soc. Japan

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Metal oxide can be prepared by mineralization process of biopolymers like cellulose, starch, alginate, chitosan, chitin, carrageenan, dextran, DNA, pectin, collagen, gelatin, silk, lignin and white-egg. The formation of corresponding hybrid composite [metal oxide@biopolymer] allows mastering the morphology, porosity, composition and structure of metal oxide and also gives access to [metal oxide@carbon] composite upon carbonization of the biopolymer We briefly review the recent advances in this fields in order to show the diversity of the approaches and their adaptations to produce material with potential applications in catalysis, energy and environment.

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Section: Sol-gel Processmentioning

confidence: 99%

Hybrid metal oxide@biopolymer materials precursors of metal oxides and metal oxide-carbon composites

Plumejeau

Alauzun

Boury

2015

J. Ceram. Soc. Japan

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“…Chemical approaches involve co‐precipitation method and sol–gel process . However, picoseconds pulsed laser ablation technique and thermal decomposition are among the most common physical methods. Obviously, all previous methods require surface modification for HNPs by utilizing polymers such as chitosan, polyvinylepyrrolidone (PVP), agarose, dextran, and gelatin .…”

Section: Introductionmentioning

confidence: 99%

“…However, picoseconds pulsed laser ablation technique and thermal decomposition are among the most common physical methods. Obviously, all previous methods require surface modification for HNPs by utilizing polymers such as chitosan, polyvinylepyrrolidone (PVP), agarose, dextran, and gelatin . In the current study, the biologically synthesized HNPs seemed to be characteristic by mono‐dispersity, high stability, additive free, larger surface area by smaller size and above all self‐functionalized as investigated previously by Eltarahony et al The inhibitory mechanism of HNPs against some selected pathogens was also studied using transmission electron microscopy (TEM) and scanning electron microscopy (SEM).…”

Section: Introductionmentioning

confidence: 99%

Study on the Antagonistic Potential of Biosynthesized Hematite Nanoparticles During Water and Wastewater Treatment

Eltarahony

Zaki

Kheiralla

et al. 2019

CLEAN Soil Air Water

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Microbial pollution of water is one of the hazardous factors that threaten public health and the surrounding ecosystem. Therefore, the development of environmentally benign nanoparticles with exceptional properties has increased the drive toward improvement of water/wastewater disinfection. Accordingly, we aim to address the antagonistic effect of biogenic hematite nanoparticles (HNPs) against a broad spectrum of microorganisms and in water/wastewater disinfection systems. The minimum inhibitory concentration of HNPs at a range of 0.075–9.6 mg mL−1 is examined. The results demonstrate that Gram‐positive bacteria are more susceptible to HNPs than Gram‐negative ones. In addition, the growth of Candida albicans and Aspergillus brasiliensis is inhibited by applying 1.2 mg mL−1 of HNPs, which indicates antifungal activity. Moreover, HNPs (0.3 mg mL−1) inhibits 58.7, 50.5, and 86.3% of the growth of Staphylococcus aureus, Pseudomonas aeruginosa biofilms, and Chlorella vulgaris, respectively. Transmission electron microscopy (TEM) and scanning electron microscopy (SEM) of untreated and HNPs‐treated cells of Escherichia coli, Staphylococcus aureus, Clostridium perfringens, Candida albicans, and Chlorella vulgaris are studied, and the ultrastructure micrographs show ultrastructure deformities caused by HNPs. Remarkable disinfection strength reaches up to 99.8%, mainly with increasing dose and contact time. The current study highlights the efficiency of HNPs as a biocide, which could contribute to water/wastewater treatment as an alternative for chlorine.

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“…Thus, the particles are being potentially used in photonics, electronics, biomedical, magnetically tunable materials, micro and nanofluidics, magnetic particle imaging, data storage and sensors [6,7]. In particular, iron oxide (Fe 2 O 3 ) nano-particles (IONPs) are widely used such applications due to their biocompatible and biodegradable nature and they can be easily controllable by magnetic field [8,9]. Further, the IONPs have very large surfaceto-volume ratio, thus they possess high surface energies [5].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterizations of Iron Oxide Nano Particles Reinforced Polymeric Thin Films

Mahendran¹

2017

NSTOA

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Open Access Research Articlepolymeric materialsin order to enhance their applications as well as physico-chemical properties of the host polymer [10,11].Recently, chemically cross-linked poly (vinyl alcohol) and poly (2-acrylamido-2-methyl-1-propanesulfonic acid) (PVA-PAMPS) films are effectively used in the mechanical devices, attributable to their biocompatibility and cost-effectiveness [12,13]. Notably, the PVA has been widely utilized in the fabrication of tablet coating, artificial tears, drug delivery and tissue replacement, owing to their specific characteristics of toxicologically safe, high oxygen permeability and biodegradability [14], conversely they possess very less mechanical stability. To overcome this major drawback, it should be chemically cross-linked / blended with other hydrophilic materials to acquire mechanically stable materials. Specifically, the PAMPS, a sulfonic acid acrylic monomer has high proton conductivity and well hydrated due to presence of sulfonic acid groups in its backbone, and they are effectively applied infuel cells, medical devices and actuators [7,15]. In order to improve their mechanical and thermal stabilities of these PVA and PAMPS polymers, they could be blended / chemically crosslinked for obtaining flexible, mechanically and thermally stable material [12,13]. Generally, the reinforcement of nano-particles into the polymer matrix enhances the mechanical, dimensional and thermal stabilities of the host polymer matrix. Very recently, Guo et al. [16] fabricated IONPs reinforced PVA composites with superior thermal stability, and the IONPs have robust interaction with the PVA matrices by hydrogen bonding between their hydroxyl groups.In this study, based on the above merits of IONPs in the polymer matrix, PVA/PAMPS / IONPs nano-composite films were fabricated by Thermally Induced Phase Separation technique. The major function of the IONPs is to enhance the thermomechanical properties, magnetic activity (superparamagtic) and dimensional stabilities of the PVA/PAMPS matrix. The physicothermal properties of the PVA/PAMPS/IONPs films were studied AbstractThe aim of this study is to investigate the influence of Iron oxidenano-particles (IONPs) on the physico-chemical properties of poly(vinyl alcohol) (PVA) -poly(2-acrylamido-2-methyl-1-propanesulfonic acid) (PAMPS) polymer matrix. The IONPs were synthesized from ferric chloride using NaBH 4 as reducing agent in distilled water, and the IONPs were characterized by FT-IR and TGA. Thinnano-composite films were fabricated by blending IONPs colloidal suspension with PVA / PAMPS solution by Thermally Induced Phase Separation technique. The reinforcement of the IONPs in the PVA / PAMPS matrix was also confirmed by FT-IR and TGA, and water uptake measurements revealed the hydrophilic nature of the IONPs. The cross-sectional and surface morphologies of the films were analyzed by High-Resolution Scanning Electron Microscopy, and the results showed that the surface roughness of the films and size of the IONPs enhanced with respect to t...

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Synthesis, characterization and magnetic properties of hematite (α-Fe2O3) nanoparticles on polysaccharide templates and their antibacterial activity

Cited by 83 publications

References 26 publications

Hybrid metal oxide@biopolymer materials precursors of metal oxides and metal oxide-carbon composites

Hybrid metal oxide@biopolymer materials precursors of metal oxides and metal oxide-carbon composites

Study on the Antagonistic Potential of Biosynthesized Hematite Nanoparticles During Water and Wastewater Treatment

Preparation and Characterizations of Iron Oxide Nano Particles Reinforced Polymeric Thin Films

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