Mechanical Behavior of Functional Hybrid Coating Based on Anisotropic Iron Oxide Nanoparticles

2007 ◽  
Vol 1007 ◽  
Author(s):  
Nicolas Chemin ◽  
Laurence Rozes ◽  
Corinne Chanéac ◽  
Sophie Cassaignon ◽  
Jean-Pierre Jolivet ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Uv Light ◽  
Point Of View ◽  
Hybrid Coatings ◽  
Oxide Nanoparticles ◽  
Iron Oxide Particles ◽  
Cross Sectional ◽  
Glass Substrates

ABSTRACTFunctional hybrid coatings have been elaborated from a polymer matrix incorporating iron oxide nanoparticles. Stable aqueous suspensions of goethite (α-FeOOH) nanorods, obtained by controlled precipitation of Fe3+ ions, were introduced in 2-hydroxyethyl methacrylate (HEMA). The films were spin-coated on glass substrates from the solutions prior to a UV light induced free radical polymerization step. Nanoindentation tests were carried out to investigate the mechanical properties of the hybrid coatings. Swelling measurements and Fourier Transformed Infrared Spectroscopy (FTIR) were used to characterize the interface between the iron oxide nanoparticles and the PHEMA matrix. Cross-sectional scanning electron microscopy (SEM) and transmission electron microscopy (TEM) was performed to evaluate the dispersion state of the iron oxide particles through the matrix. From a mechanical point of view, iron oxide nanorods yield to a strong reinforcement effect of PHEMA (increase in modulus and hardness by a factor 2 with 5%vol goethite nanoparticles). Origins of such reinforcement are attributed to the existence of highly favourable interactions at the goethite-PHEMA interface combined with a homogeneous dispersion of the particles. The nature of these interactions and evidences of there influence on the mechanical behaviour of the nanohybrid coatings are reported.

scholarly journals Performance Evaluation of Ultra-Violet Light and Iron Oxide Nanoparticles for the Treatment of Synthetic Petroleum Wastewater: Kinetics of COD Removal

Materials ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 5012
Author(s):  
Cecilia O. Akintayo ◽  
Omolola H. Aremu ◽  
Wilfred N. Igboama ◽  
Simphiwe M. Nelana ◽  
Olushola S. Ayanda
Keyword(s):  
Electron Microscopy ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Uv Light ◽  
Oxygen Demand ◽  
Ultra Violet ◽  
Cod Removal ◽  
Infrared Spectrometry ◽  
Oxide Nanoparticles ◽  
Order Kinetic

In this study, the use of ultra-violet (UV) light with or without iron oxide nanoparticles (IONPs) for the degradation of synthetic petroleum wastewater was investigated. The IONPs was synthesised by sodium borohydride reduction of ferric chloride solution and was characterised by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectrometry (FTIR), x-ray fluorescence spectrophotometry (XRF), and energy dispersive spectroscopy (EDS). The amount of degradation was evaluated by chemical oxygen demand (COD) determination. Experimental results show that the COD removal from synthetic petroleum wastewater by IONPs/UV system was more effective than they were independently. The combination of UV light at a wavelength of 254 nm, pH of 8, and 1.0 g of IONPs resulted in COD removal from 10.5% up to 95.5%. The photocatalytic degradation of synthetic petroleum wastewater is about 1.3–2.0 times faster in comparison to UV light only. The removal of COD from synthetic petroleum wastewater by UV light and IONPs follows the pseudo-first-order kinetic model with rate constant k ranging from 0.0133 min−1 to 0.0269 min−1. Consequently, this study has shown that the use of UV light in the presence of IONPs is favourable and effective for the removal of organic pollutants from petroleum refinery wastewater.

PHOTOCATALYTIC DEGRADATION OF METHYLENE BLUE USING IRON OXIDE NANOPARTICLES SYNTHESIZED USING ANNONA MURICATA LEAF EXTRACT

2020 ◽  
pp. 46-51
Author(s):  
BEENA JOSE ◽  
FEMY THOMAS
Keyword(s):  
Electron Microscopy ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Leaf Extract ◽  
Iron Oxide Nanoparticle ◽  
Oxide Nanoparticles ◽  
Annona Muricata ◽  
Aqueous Leaf Extract ◽  
Oxide Nanoparticle ◽  
Uv Visible

Objective: The objective of the present study is the synthesis of iron oxide nanoparticles using Annona muricata aqueous leaf extract, characterization of the synthesized nanoparticles and evaluation of the antibacterial, photocatalytic activity and cytotoxicity. Methods: The iron oxide nanoparticle was synthesized using Annona muricata aqueous leaf extract and the crystal structure of the iron oxide nanoparticle was determined by UV-Visible spectroscopy, Transmission Electron Microscopy (TEM), Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD) and Fourier Transform Infrared Spectroscopy (FTIR). The in vitro cytotoxicity of iron oxide nanoparticles was evaluated using Dalton’s lymphoma ascites cells and the antibacterial assay was conducted using agar well diffusion method. Results: The UV-Visible spectrum of iron oxide nanoparticle showed a maximum absorption peak at 265 nm. This is the XRD pattern of iron oxide nanoparticles exhibited a distinct peak at 26.029 (2θ), accounting for crystal plane (211). SEM images revealed that the synthesized iron oxide nanoparticles were aggregated as irregular sphere shapes with rough surfaces. TEM image reveals the size of the synthesized iron oxide nanoparticles are spherical in shape with an average size of 20 nm. Green synthesized iron oxide nanoparticles using Annona muricata leaf extract effectively degraded methylene blue dye. Conclusion: This study showed that the synthesized iron oxide nanoparticles using Annona muricata aqueous leaf extract exhibited pronounced antibacterial, anticancer and photocatatytic activity and can be used in the textile industry for the purification of water contaminated with carcinogenic textile dyes. It can also be used as an external antiseptic in the prevention and treatment of bacterial infections.

ß-Amido Acid Functionalised Superparamagnetic Iron Oxide Nanoparticles as a Novel Carrier for Efficient Delivery of Doxorubicine

2017 ◽  
Vol 41 (3) ◽  
pp. 129-135
Author(s):  
Fatemeh Ebrahimi ◽  
Maryam Karimi ◽  
Hasan Sereshti ◽  
Mohsen Yousefifar
Keyword(s):  
Electron Microscopy ◽  
Drug Delivery ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Superparamagnetic Iron Oxide ◽  
Superparamagnetic Iron Oxide Nanoparticles ◽  
Precipitation Method ◽  
Hydrodynamic Diameter ◽  
Oxide Nanoparticles ◽  
Amido Acid

Superparamagnetic iron oxide nanoparticles are increasingly used in medical applications due to their unique physical properties. They are useful carriers for delivering antitumour drugs in targeted cancer treatment. In this study, amido acid-functionalised magnetic nanoparticles (AAFMNs) are used as drug-delivery vehicles for doxorubicine as an efficient tool for the treatment of cancer. Magnetic iron oxide nanoparticles were synthesised using a co-precipitation method. The prepared iron oxide nanoparticles were then functionalised with amido acid functional groups. Finally, the synthesised AAFMNs were used for the delivery of doxorubicine. AAFMNs were characterised by Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, thermogravimetric analysis and zeta potential. An in vitro-determined hydrodynamic diameter of ∼80 nm suggested their applicability for this purpose. The findings show that AAFMNs are a promising tool for potential magnetic drug delivery.

scholarly journals Synthesis and characterization of dextran-coated iron oxide nanoparticles

2018 ◽  
Vol 5 (3) ◽  
pp. 171525 ◽  
Author(s):  
Andra Mihaela Predescu ◽  
Ecaterina Matei ◽  
Andrei Constantin Berbecaru ◽  
Cristian Pantilimon ◽  
Claudia Drăgan ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Quantum Interference ◽  
Synthesis And Characterization ◽  
Oxide Nanoparticles ◽  
Transmission Electron ◽  
Molar Weight ◽  
Co Precipitation

Synthesis and characterization of iron oxide nanoparticles coated with a large molar weight dextran for environmental applications are reported. The first experiments involved the synthesis of iron oxide nanoparticles which were coated with dextran at different concentrations. The synthesis was performed by a co-precipitation technique, while the coating of iron oxide nanoparticles was carried out in solution. The obtained nanoparticles were characterized by using scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction spectrometry, Fourier transform infrared spectroscopy and superconducting quantum interference device magnetometry. The results demonstrated a successful coating of iron oxide nanoparticles with large molar weight dextran, of which agglomeration tendency depended on the amount of dextran in the coating solution. SEM and TEM observations have shown that the iron oxide nanoparticles are of about 7 nm in size.

Casein-Coated Iron Oxide Nanoparticles for in vitro Hyperthermia for Cancer Therapy

SPIN ◽  
2019 ◽  
Vol 09 (02) ◽  
pp. 1940003 ◽  
Author(s):  
Milad Salimi Bani ◽  
Shadie Hatamie ◽  
Mohammad Haghpanahi ◽  
Hossein Bahreinizad ◽  
Mohammad Hossein Shahsavari Alavijeh ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Iron Oxide ◽  
Cancer Therapy ◽  
Iron Oxide Nanoparticles ◽  
Surrounding Medium ◽  
Treatment Method ◽  
Oxide Nanoparticles ◽  
One Pot ◽  
X Ray

Iron oxide nanoparticles (NPs) have been a very appealing choice in magnetic-mediated hyperthermia for cancer therapy. The responses of NPs to hyperthermia as a cancer treatment method are complex and variable. Herein, the heating properties of the casein-coated magnetic NPs (MNPs) under an alternating magnetic field were investigated. The casein-coated MNPs were synthesized via one-pot chemical method. The casein-coated MNPs were characterized using transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDAX), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), zeta potential, dynamic light scattering (DLS), and vibrating sample magnetometer (VSM) analysis. TEM images of casein-coated MNPs show that their shapes are spherical and their core sizes are between 20[Formula: see text]nm and 25[Formula: see text]nm. The FTIR and EDAX results confirmed the presence of casein on the surface of MNPs. The VSM shows the superparamagnetic nature of iron oxide and casein-coated iron oxide NPs with the magnetic saturation of 60[Formula: see text]emu/g and 44.86[Formula: see text]emu/g, respectively, at room temperature. Furthermore, hyperthermia tests for casein-coated MNPs with various concentrations and frequencies are performed. Hyperthermia results show that lower concentrations of casein-coated MNPs dispatch higher heating into their surrounding medium, whereas maximum specific absorption rate occurs at the concentration of 1[Formula: see text]mg/mL for the frequency of 150[Formula: see text]kHz. Findings of this study suggest that casein-coated MNPs have great potential as an anticancer agent in hyperthermia cancer therapy.

scholarly journals Construction of a device for magnetic separation of superparamagnetic iron oxide nanoparticles

2015 ◽  
Vol 1 (1) ◽  
pp. 306-309 ◽  
Author(s):  
Kerstin Kläser ◽  
Matthias Graeser ◽  
Dirk Steinhagen ◽  
Kerstin Luedtke-Buzug
Keyword(s):  
Iron Oxide ◽  
Magnetic Separation ◽  
Iron Oxide Nanoparticles ◽  
Superparamagnetic Iron Oxide ◽  
Superparamagnetic Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Iron Oxide Particles ◽  
Huge Impact ◽  
Magnetic Resonance Imaging Mri ◽  
Particle Imaging

AbstractSuspensions of iron oxide particles, so called ferrofluids, are successfully used in various technical, biochemical and medical applications. For example they find use in the area of sensor engineering, magnetic resonance imaging (MRI) and especially magnetic particle imaging (MPI). MPI is a new tomographic imaging technique that determines the spatial distribution of superparamagnetic iron oxide nanoparticles (SPIONs). Besides a very high spatial and temporal resolution MPI provides quantitative realtime imageing. The nanoparticles cause a magnetization change that can be measured. As the particle size distribution has a huge impact on the magnetization behavior is an important parameter for optimization. While synthesizing, SPIONs particles with various dimensions are formed what necessitates a systematically separation by size. For this purpose a construction of a simple device for magnetic separation of SPIONs has been developed. First attemps of separation show the potential of this method.

scholarly journals One step paired electrochemical synthesis of iron and iron oxide nanoparticles

2016 ◽  
Vol 34 (3) ◽  
pp. 655-658 ◽  
Author(s):  
Juliet Ordoukhanian ◽  
Hassan Karami ◽  
Azizollah Nezhadali
Keyword(s):  
Electron Microscopy ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Low Cost ◽  
Electrolytic Cell ◽  
Oxide Nanoparticles ◽  
Transmission Electron ◽  
One Step ◽  
Application Potential ◽  
Reduction Of Energy Consumption

AbstractIn this study, a new one step paired electrochemical method is developed for simultaneous synthesis of iron and iron oxide nanoparticles. iron and iron oxide are prepared as cathodic and anodic products from iron (ii) sulfate aqueous solution in a membrane divided electrolytic cell by the pulsed current electrosynthesis. Because of organic solvent-free and electrochemical nature of the synthesis, the process could be considered as green and environmentally friendly. The reduction of energy consumption and low cost are the other significant advantages of this new method that would have a great application potential in the chemical industry. The nanostructure of prepared samples was characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The magnetic properties were studied by vibrating sample magnetometer (VsM).

Facile synthesis of zeolite-encapsulated iron oxide nanoparticles as superior catalysts for phenol oxidation

RSC Advances ◽  
2015 ◽  
Vol 5 (37) ◽  
pp. 29509-29512 ◽  
Author(s):  
Lei Luo ◽  
Chengyi Dai ◽  
Anfeng Zhang ◽  
Junhu Wang ◽  
Min Liu ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Physicochemical Properties ◽  
Iron Oxide Nanoparticles ◽  
Chemical State ◽  
Phenol Oxidation ◽  
Oxide Nanoparticles ◽  
Iron Oxide Particles ◽  
Facile Synthesis ◽  
Oxide Particles

Meso-ZSM-5 modified by polyethyleneimine has been found to be an excellent support for iron oxide with improved physicochemical properties of iron oxide particles including size and chemical state.

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