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Journal articles on the topic 'Iron Oxide (Fe3O4)'

Author: Grafiati

Published: 5 June 2025

Last updated: 16 July 2025

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1

Mbuyazi, Thandi B., and Peter A. Ajibade. "Influence of Different Capping Agents on the Structural, Optical, and Photocatalytic Degradation Efficiency of Magnetite (Fe3O4) Nanoparticles." Nanomaterials 13, no. 14 (2023): 2067. http://dx.doi.org/10.3390/nano13142067.

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Octylamine (OTA), 1-dodecanethiol (DDT), and tri-n-octylphosphine (TOP) capped magnetite nanoparticles were prepared by co-precipitation method. Powder X-ray diffraction patterns confirmed inverse spinel crystalline phases for the as-prepared iron oxide nanoparticles. Transmission electron microscopic micrographs showed iron oxide nanoparticles with mean particle sizes of 2.1 nm for Fe3O4-OTA, 5.0 nm for Fe3O4-DDT, and 4.4 nm for Fe3O4-TOP. The energy bandgap of the iron oxide nanoparticles ranges from 2.25 eV to 2.76 eV. The iron oxide nanoparticles were used as photocatalysts for the degrada

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Li, Ningjie, Jieyu Yu, Xiaojie Wang, Liu Chen, Hong Jiang, and Wenjie Zhang. "Growth, Oxidative Stress and Ability to Degrade Tetrabromobisphenol A of Phanerochaete chrysosporium in the Presence of Different Nano Iron Oxides." Water 16, no. 4 (2024): 567. http://dx.doi.org/10.3390/w16040567.

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In order to improve the performance of white rot fungi, especially the model species Phanerochaete chrysosporium in tetrabromobisphenol A (TBBPA) degradation, the strategy of synergizing Phanerochaete chrysosporium with nano iron oxides was considered; however, the effects of different nano iron oxides on Phanerochaete chrysosporium are still unknown. In this study, 20 nm γ-Fe2O3, 30 nm α-Fe2O3, 20 nm Fe3O4, and 200 nm Fe3O4 were used, and the fungal growth, oxidative stress, and ability to degrade TBBPA were monitored. The results showed that the addition of four nano iron oxides did not inhi

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3

Setina, Janina, Alona Gabrene, Inna Juhnevica, and Gundars Mezinskis. "Characterization of Iron Oxide Nanoparticles for Sol-Gel Dip-Coating Method Prepared Thin Films." Advanced Materials Research 704 (June 2013): 275–80. http://dx.doi.org/10.4028/www.scientific.net/amr.704.275.

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The paper describes two methods of syntheses of iron oxides, microstructure and morphology of magnetite nanoparticles. Nanocomposite thin films of SiO2/Fe3O4 have been prepared with sol-gel dip coating technique: dip-coating from SiO2/Fe3O4 sol and encapsulation magnetite between two SiO2 layers. Structural and morphological characteristics of iron oxides particles and prepared film were analyzed by X-Ray Diffraction, SEM, FTIR, DTA, AFM. AFM topography of surface and measurements of roughness has shown that using iron oxide encapsulation between two SiO2 layers to provide the even distributio

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4

Madhu, GC, Kannaiyan Jaianand, K. Rameshkumar, Muthukumarasamy Eyini, Paulraj Balaji, and Veeramani Veeramanikandan. "Solanum tuberosum extract mediated synthesis and characterization of iron oxide nanoparticles for their antibacterial and antioxidant activity." Journal of Drug Delivery and Therapeutics 9, no. 1-s (2019): 5–15. http://dx.doi.org/10.22270/jddt.v9i1-s.2238.

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In the present study, the potential of aqueous extract of Solanum tuberosum for synthesis of Iron Oxide nanoparticles (Fe3O4) was evaluated. An eco-friendly synthesis of iron oxide nanoparticles and characteristics of the obtained Fe3O4 nanoparticles were studied using Ultraviolet-visible spectroscopy (UV-Vis), Fourier Transform Infra-Red Spectroscopy (FTIR), Scanning Electron Microscope (SEM), Energy-dispersive X-ray spectroscopy (EDX), X-Ray Diffraction (XRD) and High Performance Liquid Chromatography (HPLC). The synthesized Iron oxide nanoparticles were effectively utilized for the antibact

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5

Chkhartishvili, Levan, Natia Barbakadze, Otar Tsagareishvili, et al. "Coating of Carbon Black (CB) and Graphene Oxides (GOs) with Magnetite (Fe3O4)." International Journal of Advanced Nano Computing and Analytics 3, no. 1 (2024): 06–19. http://dx.doi.org/10.61797/ijanca.v3i1.330.

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Composites containing iron oxides are obtained by the co-precipitation of iron(II) and iron(III) compounds in the presence of different substrates in an alkaline environment. Newly synthesized graphene oxide (GO), reduced graphene oxide (rCO) and carbon black (CB) are used as substrates. Methods of obtaining GO–amorphous iron compound, rGO–Fe3O4, and CB–Fe3O4 composites are developed. It is determined that rGO–Fe3O4 and CB–Fe3O4 magnetic composites can be obtained at 70–75°C, while in the presence of GO, a non-magnetic composite containing an amorphous iron compound is formed under the same co

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6

Nguyen-Le, Minh-Tri, Dinh Tien Dung Nguyen, Sophia Rich, Ngoc Tram Nguyen, Cuu Khoa Nguyen, and Dai Hai Nguyen. "SYNTHESIS AND CHARACTERIZATION OF SILICA COATED MAGNETIC IRON OXIDE NANOPARTICLES." Vietnam Journal of Science and Technology 57, no. 3A (2019): 160. http://dx.doi.org/10.15625/2525-2518/57/3a/14203.

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Advances in nanotechnology in recent years has led to a number of diverse applications of nanomaterials. Magnetic iron oxide nanoparticles (Fe3O4 NPs), a representative of magnetic nanomaterials, has gained much attention of many researchers all over the world due to their unique properties such as superparamagnetism, biocompatibility and high magnetic saturation. With such properties, Fe3O4 NPs can be exploited in many fields, particularly biomedicine related fields such as cellular therapy, tissue repair, drug delivery, magnetic resonance imaging, hyperthermia and magnetofection. However, ow

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7

Fatmawati, Eny, Siti Nur Halizah, Nadiya Miftachul Chusna, Futri Yuliana, and Sunaryono Sunaryono. "Crystal Structure, Morphology, and Magnetic Properties of Magnetic Nanocomposites with Iron Oxide Core and Zinc Oxide/Titanium Oxide Shell." Journal of Metastable and Nanocrystalline Materials 38 (January 15, 2024): 1–14. http://dx.doi.org/10.4028/p-6oel85.

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In this work, we successfully synthesized a magnetic nanocomposite material (Fe3O4@ZnO/TiO2) with an iron oxide core and a zinc oxide/TiO2 shell (Fe3O4@ZnO/TiO2). The purpose of this study was to characterize the Crystal Structure, Morphology, and Magnetic Properties of Magnetic Nanocomposites with Iron Oxide Core and Zinc Oxide/Titanium Oxide Shell. The crystal structure of the sample was analyzed using X-ray diffraction, which identified three distinct phases: Fe3O4, ZnO, and TiO2. These phases respectively exhibited cubic spinel, hexagonal wurtzite, and tetragonal crystal structures. Transm

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8

Liu, Z. Q., H. Hashimoto, T. Sakata, et al. "Transmission Electron Microscopy Investigation on the Electron-stimulated Oxidation of Iron Nitrides by 2-MeV Electron Irradiation." Journal of Materials Research 20, no. 7 (2005): 1918–26. http://dx.doi.org/10.1557/jmr.2005.0240.

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An iron nitride sample was irradiated by 2-MeV electrons intermittently for 2100 s with a dose rate of 6.3 × 1024 e.m.−2 s−1 inside a 3-MV high-voltage transmission electron microscope. The electron-stimulated oxidation of Fe4N and Fe2–3N was investigated in situ and ex situ using conventional transmission electron microscopy and high-resolution electron microscopy. It was found that both Fe4N and Fe2–3N nitrides were oxidized by the residual gas in the vacuum chamber to form Fe3O4 oxides. The orientation relationship between Fe4N (γ′) and Fe3O4 (o) was (110)γ′//(220)o, [001]γ′//[001]o, and th

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9

Kristianto, Hans, Joshua Alexander, Susiana Prasetyo, and Asaf K. Sugih. "Tannic acid modified iron oxide nanoparticles and its application in protein adsorption: isotherm, kinetic, and thermodynamic study." Molekul 17, no. 1 (2022): 49. http://dx.doi.org/10.20884/1.jm.2022.17.1.5571.

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Iron oxide nanoparticles, such as Fe3O4, are commonly used in various applications, such as drug delivery, magnetic fluid, water purification, and enzyme immobilization. These applications require protein to be adsorbed on the surface of iron oxide nanoparticles. However direct utilization of iron oxide nanoparticles has several drawbacks, thus modification of iron oxide nanoparticles is usually done. In this study, we reported surface modification of Fe3O4 using tannic acid to adsorb bovine serum albumin (BSA). The effect of modification and the BSA adsorption on the Fe3O4 was characterized u

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10

Khan, Samara, Shashi Sharma, Shiv Shankar Gaur, and Anurag Gaur. "Iron oxide (Fe3O4) and ciprofloxacin loaded magnetic nanoparticles for magnetic drug targeting." Current Natural Sciences and Engineering 1, no. 1 (2024): 43–50. http://dx.doi.org/10.63015/5c-2413.1.1.

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Iron oxide (Fe3O4) pristine and ciprofloxacin loaded nanoparticles are synthesized successfully using co-precipitation method. X-ray diffraction analysis confirms the pure phase formation of the synthesized Fe3O4 particles. The grain size of the Fe3O4 calculated from the SEM images comes out to be 50 nm. UV-VIS spectrophotometric analysis indicates the accuracy of the results in which an absorption maximum of blank and ciprofloxacin containing iron oxide (Fe3O4) particle was observed at 260 and 265 nm respectively. The spectrum band shows the maximum absorption band shift of around 4-5 nm whic

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11

Michalak, Natalia, Zygmunt Miłosz, Gina Peschel, et al. "Symmetry-Induced Structuring of Ultrathin FeO and Fe3O4 Films on Pt(111) and Ru(0001)." Nanomaterials 8, no. 9 (2018): 719. http://dx.doi.org/10.3390/nano8090719.

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Iron oxide films epitaxially grown on close-packed metal single crystal substrates exhibit nearly-perfect structural order, high catalytic activity (FeO) and room-temperature magnetism (Fe3O4). However, the morphology of the films, especially in the ultrathin regime, can be significantly influenced by the crystalline structure of the used support. This work reports an ultra-high vacuum (UHV) low energy electron/synchrotron light-based X-ray photoemission electron microscopy (LEEM/XPEEM) and electron diffraction (µLEED) study of the growth of FeO and Fe3O4 on two closed-packed metal single crys

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12

Ma, Chuan Guo, Hai Jun Zheng, Xiao Ming Li, and Liang Gao. "Preparation and Microwave Absorbing Properties of Iron Oxides/Carbon Nanotubes Compounds." Advanced Materials Research 548 (July 2012): 133–37. http://dx.doi.org/10.4028/www.scientific.net/amr.548.133.

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A Series of iron oxides/CNTs compounds were prepared using a method of impregnation with iron nitrate solution and followed thermal decomposition. The compounds were characterized by the means of scanning electronic microscope, X-ray diffraction and thermogravimetic analysis. The dielectric and microwave-absorbing properties of EP composites containing the different compounds were further measured in a specific frequency range. The results show that: CNTs show reduction at a high temperature, and can make products of the thermal decomposition of iron nitrate produce iron oxide nanoparticles wi

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13

Zhang, Wan Ju, and Fang Wang. "Synthesis and Aqueous Dispersion of Monodisperse Magnetic Fe₃O₄ Nanoparticles." Advanced Materials Research 668 (March 2013): 335–37. http://dx.doi.org/10.4028/www.scientific.net/amr.668.335.

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Iron oxide (Fe3O4) nanoparticles as one of the most important nanomaterials are suitable for many applications. Monodisperse magnetic Fe3O4 nanoparticles were synthesized by the thermal decomposition of the iron oleate precursor in octadecene (ODE). The iron oleate complex was prepared by reaction between sodium oleic and FeCl3·6H2O at low temperature. The Fe3O4 nanoparticles were transferred from organic solvent into water by amphiphilic copolymer. The aqueous dispersion of Fe3O4 nanoparticles was stable in water and physiological buffers. This method with low cost can be used to prepare larg

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14

Mayandi, Jeyanthinath. "Solvothermal synthesis and characterization of Iron oxide nanoparticles." Malaysian NANO-An International Journal 2, no. 2 (2022): 27–35. http://dx.doi.org/10.22452/mnij.vol2no2.3.

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In the present study, we investigated the crystallinity, surface morphology, and optical properties of iron oxide (Fe3O4) nanoparticles (NPs) formed by solvothermal synthesis. From powder XRD analysis, the Fe3O4 NPs were found to be an inverse spinel structure and highly crystalline nature. The surface morphology and particle size distribution were analyzed using a scanning electron microscope (SEM). The elemental compositions were confirmed using energy-dispersive X-ray spectroscopy (EDX). The optical characteristics of the Fe3O4 NPs were analyzed by UV-Vis spectroscopy. Overall, from the ana

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15

Stavarache, Carmen, Mircea Vinatoru, Timothy Mason, and Larysa Paniwnyk. "The Effects of Magnetic Nanoparticles Incorporated in Polyelectrolyte Capsules." Materiale Plastice 54, no. 4 (2017): 630–34. http://dx.doi.org/10.37358/mp.17.4.4914.

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Polyelectrolyte multilayer capsules are synthesized comprising of 12 total layers each containing a single layer of iron oxide nanoparticles in shells 4, 6, 8 or 10. A protein-labelled dye is embedded in the calcium carbonate template core as a model for the encapsulation of a drug. The core is dissolved after 6 layers are formed. Two types of magnetic nanoparticles are incorporated into various capsule shells: ferric oxide (Fe2O3, 50 nm) and iron oxide (Fe3O4, 15 nm), a 1:1 (vol.) mixture of the two types of nanoparticles suspensions is also used. Nanoparticle inclusion reduces the capsule si

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16

Tegafaw, Tirusew, Wenlong Xu, Sang Hyup Lee, Kwon Seok Chae, Yongmin Chang, and Gang Ho Lee. "Production of nearly monodisperse Fe3O4 and Fe@Fe3O4 nanoparticles in aqueous medium and their surface modification for biomedical applications." International Journal of Modern Physics B 31, no. 04 (2017): 1750014. http://dx.doi.org/10.1142/s021797921750014x.

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Iron (Fe)-based nanoparticles are extremely valuable in biomedical applications owing to their low toxicity and high magnetization values at room temperature. In this study, we synthesized nearly monodisperse iron oxide (Fe3O4) and Fe@Fe3O4 (core: Fe, shell: Fe3O[Formula: see text] nanoparticles in aqueous medium under argon flow and then, coated them with various biocompatible ligands and silica. In this study, eight types of surface-modified nanoparticles were investigated, namely, Fe3O4@PAA (PAA = polyacrylic acid; [Formula: see text] of PAA = 5100 amu and 15,000 amu), Fe3O4@PAA–FA (FA = fo

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17

Kubiak, Adam, Marta Kubacka, Elżbieta Gabała, et al. "Hydrothermally Assisted Fabrication of TiO2-Fe3O4 Composite Materials and Their Antibacterial Activity." Materials 13, no. 21 (2020): 4715. http://dx.doi.org/10.3390/ma13214715.

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The TiO2-Fe3O4 composite materials were fabricated via the hydrothermal-assisted technique. It was determined how the molar ratio of TiO2 to Fe3O4 influences the crystalline structure and morphology of the synthesized composite materials. The effect of the molar ratio of components on the antibacterial activity was also analyzed. On the basis of XRD patterns for the obtained titanium(IV) oxide-iron(II, III) oxide composites, the two separate crystalline forms—anatase and magnetite —were observed. Transmission electron microscopy revealed particles of cubic and tetragonal shape for TiO2 and sph

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18

Chu, Feng-Jen, Terng-Jou Wan, His Chen, Chih-Hung Wu, and Po-Min Kao. "Magnetophoretic Harvesting of Nannochloropsis oculata Using Iron Oxide Immobilized Beads." Water 12, no. 1 (2020): 236. http://dx.doi.org/10.3390/w12010236.

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In this work, the harvesting of Nannochloropsis oculata microalgae through the use of nanosized Fe3O4 immobilized in polyvinyl alcohol (PVA)/sodium alginate (SA) as a flocculant (Fe3O4/PS) is investigated. Using the Fe3O4/PS immobilized beads could reduce the amount of soluble ferrous ions (Fe2+) released from naked Fe3O4 in acid treatment, leading to easy recovery. The characterization was performed under different dosages and pH values of Fe3O4/PS. The results show that the Fe3O4/PS, when applied to the algae culture (500 mg dry cell weight/L), achieves a 96% harvesting efficiency under cond

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Vuong Hoan, Nguyen Thi, Nguyen Thi Anh Thu, Hoang Van Duc, Nguyen Duc Cuong, Dinh Quang Khieu, and Vien Vo. "Fe3O4/Reduced Graphene Oxide Nanocomposite: Synthesis and Its Application for Toxic Metal Ion Removal." Journal of Chemistry 2016 (2016): 1–10. http://dx.doi.org/10.1155/2016/2418172.

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The synthesis of reduced graphene oxide modified by magnetic iron oxide (Fe3O4/rGO) and its application for heavy metals removal were demonstrated. The obtained samples were characterized by X-ray diffraction (XRD), nitrogen adsorption/desorption isotherms, X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR), and magnetic measurement. The results showed that the obtained graphene oxide (GO) contains a small part of initial graphite as well as reduced oxide graphene. GO exhibits very high surface area in comparison with initial graphite. The morphology of Fe3

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20

Yin, Song, Tiantian Zhang, Yinfeng Yu, et al. "Study on the Preparation and Optical Properties of Graphene Oxide@Fe3O4 Two-Dimensional Magnetically Oriented Nanocomposites." Materials 16, no. 2 (2023): 476. http://dx.doi.org/10.3390/ma16020476.

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In this work, graphene oxide@Fe3O4 (GO@Fe3O4) two-dimensional magnetically oriented nanocomposites were prepared through the co-precipitation approach using graphene oxide as the carrier and FeCl3·6H2O and FeSO4·7H2O as iron sources. The samples were characterized and tested by X-ray diffraction, a transmission electron microscope, Fourier-transform infrared spectroscopy, a vibrating-specimen magnetometer, a polarized optical microscope, an optical microscope, etc. The effects of material ratios and reaction conditions on the coating effects of Fe3O4 on the GO surface were investigated. The st

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21

García Acevedo, Pelayo, Manuel A. González Gómez, Ángela Arnosa Prieto, et al. "Fluorescent Single-Core and Multi-Core Nanoprobes as Cell Trackers and Magnetic Nanoheaters." Magnetochemistry 8, no. 8 (2022): 83. http://dx.doi.org/10.3390/magnetochemistry8080083.

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Iron oxide magnetic nanoparticles (MNPs) have been widely studied due to their versatility for diagnosis, tracking (magnetic resonance imaging (MRI)) and therapeutic (magnetic hyperthermia and drug delivery) applications. In this work, iron oxide MNPs with different single-core (8–40 nm) and multi-core (140–200 nm) structures were synthesized and functionalized by organic and inorganic coating materials, highlighting their ability as magnetic nanotools to boost cell biotechnological procedures. Single core Fe3O4@PDA, Fe3O4@SiO2-FITC-SiO2 and Fe3O4@SiO2-RITC-SiO2 MNPs were functionalized with f

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22

Alimin, A., L. O. Kadidae, L. Agusu, L. O. Ahmad, S. J. Santosa та A. Asria. "Formation Mechanisms of Co-existence of α-Fe and Iron Oxides Nanoparticles Decorated on Carbon Nanofibers by a Simple Liquid Phase Adsorption-Thermal Oxidation". Journal of New Materials for Electrochemical Systems 25, № 3 (2022): 200–205. http://dx.doi.org/10.14447/jnmes.v25i3.a07.

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We propose formation mechanisms of co-existence of α-Fe and iron oxides nanoparticles decorated on CNFs. The α-Fe nanoparticles are produced via oxidation-reduction mechanisms, which occur in liquid phase adsorption (LPA) assisted by ultrasonic energy, while α-Fe2O3 nanoparticles are thermally formed through mechanisms of Lewis acidbase. In addition, Fe3O4 is thermally formed by reducing Fe2O3 by CNFs. Liquid phase adsorption assisted by ultrasonic energy under ambient temperature using Fe(NO3)3•9H2O as a precursor of iron oxides and α-Fe has been applied. Then, as prepared, Fe(III)@CNFs were

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23

Vignesh, C., K. Vinoth, L. Chinnappa, and Jeronsia J. Emima. "Controlled Synthesis of Polyaniline/Iron Oxide Nanocomposites for Thermoelectric Applications." Research Journal of Chemistry and Environment 27, no. 7 (2023): 23–33. http://dx.doi.org/10.25303/2707rjce023033.

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Polyaniline (PANI) / iron oxide (Fe3O4) nanocomposites were synthesized via the sol-gel method by tuning the weight ratios of Fe3O4 (2wt %, 4wt % and 6wt %). The functional groups, crystal structure and surface morphologies of the PANI/Fe3O4 nanocomposites were analyzed using Fourier transform infrared spectroscopy (FTIR), X–ray powder diffraction and Scanning electron microscopy (SEM) respectively. The thermoelectrical properties were also analyzed. Based on the FTIR studies, the presence of functional groups of PANI/Fe3O4 nanocomposites was revealed. From SEM observations, spherical nanopart

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Sharif, Muhammad Shakeeb, Hajra Hameed, Abdul Waheed, et al. "Biofabrication of Fe3O4 Nanoparticles from Spirogyra hyalina and Ajuga bracteosa and Their Antibacterial Applications." Molecules 28, no. 8 (2023): 3403. http://dx.doi.org/10.3390/molecules28083403.

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Iron oxide nanoparticles (NPs) have attracted substantial interest due to their superparamagnetic features, biocompatibility, and nontoxicity. The latest progress in the biological production of Fe3O4 NPs by green methods has improved their quality and biological applications significantly. In this study, the fabrication of iron oxide NPs from Spirogyra hyalina and Ajuga bracteosa was conducted via an easy, environmentally friendly, and cost-effective process. The fabricated Fe3O4 NPs were characterized using various analytical methods to study their unique properties. UV-Vis absorption peaks

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Aritonang, Sri Pratiwi, Rikson Siburian, Ab Malik Marwan Ali, and Tamrin. "FE3O4 AND MN3O4 DECORATED ONTO N-DOPED GRAPHENE FOR ANODE ACTIVE MATERIALS IN LITHIUM-ION BATTERIES." Journal of Southwest Jiaotong University 56, no. 6 (2021): 267–76. http://dx.doi.org/10.35741/issn.0258-2724.56.6.22.

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Recently, iron oxide (Fe3O4) and manganese oxide (Mn3O4)has been the most promising anode active materials in lithium-ion batteries (LIBs) owing to their abundance, low cost, and environmental friendliness. However, these batteries have many disadvantages, hindering the application of Fe3O4 and Mn3O4 as anode materials. This study aimed to decorate Fe3O4 and Mn3O4 onto pristine N-doped graphene and improve their electrical properties for potential use as enhanced active anode materials for lithium-ion batteries. We synthesized Fe3O4 and Mn3O4 via the simple co-precipitation method, and the res

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Mercan, Doina-Antonia, Dana-Ionela Tudorache (Trifa), Adelina-Gabriela Niculescu, et al. "Antimicrobial Coatings Based on Hybrid Iron Oxide Nanoparticles." Nanomaterials 15, no. 9 (2025): 637. https://doi.org/10.3390/nano15090637.

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This study presents the preparation of hybrid iron oxide nanocomposites through a two-step process combining microfluidic-assisted synthesis and post-synthetic surface modification. Fe3O4 nanoparticles were synthesized and simultaneously functionalized with salicylic acid using a three-dimensional vortex-type microfluidic chip, enabling rapid and uniform particle formation. The resulting Fe3O4/SA nanostructures were further modified with either silver or copper oxide to form iron oxide nanocomposites with enhanced antimicrobial functionality. These nanocomposites were subsequently integrated i

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Arora, Avnish Kumar, Mohan Sharma, Ritu Kumari, Vivek Sheel Jaswal та Pankaj Kumar. "Synthesis, Characterization, and Magnetic Studies ofα-Fe2O3Nanoparticles". Journal of Nanotechnology 2014 (2014): 1–7. http://dx.doi.org/10.1155/2014/474909.

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Very fine nanosized metal oxide, namely, iron oxide (α-Fe2O3) has been synthesized by precipitation method using ammonia as precipitating agent and characterized by using XRD (X-ray diffraction), TGA/DTA, surface area measurement, transmission electron microscopy (TEM), and magnetic measurements techniques. XRD studies show that iron oxide was formed asα-Fe2O3instead of the commonly formed magnetite nanoparticles (Fe3O4) or a mixture of magnetite (Fe3O4) and maghemite (γ-Fe2O3, cubic), and it has rhombohedral structure. Magnetic measurements showed that iron oxide has five unpaired electrons a

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Vignesh, C., K. Vinoth, J. Emima Jeronsia, et al. "Enhancement of Thermoelectric Properties in Nanocomposites Through the Synergistic Integration of Zinc and Iron Oxides with Polyaniline." Science of Advanced Materials 16, no. 2 (2024): 167–76. http://dx.doi.org/10.1166/sam.2024.4630.

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In this study, we systematically varied the weight ratios of zinc and iron oxides (2 wt%, 4 wt%, and 6 wt%) to fabricate nanocomposites consisting of polyaniline (PANI), zinc oxide (ZnO), and iron oxide (Fe3O4) through the sol–gel method. Comprehensive analyses using FTIR, XRD, and SEM were conducted to elucidate the functional groups, particle size, crystal structure, and surface morphologies of PANI/ZnO/Fe3O4 nanocomposites. Furthermore, thermoelectric characteristics were thoroughly investigated. A mechanistic insight into the PANI/ZnO/Fe3O4 nanocomposite formation was proposed based on the

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Janetaisong, Pathompong, Viset Lailuck, and Somsak Supasitmongkol. "Pelletization of Iron Oxide Based Sorbents for Hydrogen Sulfide Removal." Key Engineering Materials 751 (August 2017): 449–54. http://dx.doi.org/10.4028/www.scientific.net/kem.751.449.

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Biogas derived from anaerobic digestion of biological wastes has been extensively used for heating purposes and/or electricity generation. Presence of hydrogen sulfide (H2S) in biogas affects engine performance adversely, thus reducing H2S content is a valuable part in practical application before utilizing biogas. Adsorptive separation is very appealing due to being an economical and effective method including the use of iron oxide based adsorbents. Pelletization of iron oxide adsorbents has never been reported among the adsorbents described to date. Therefore, H2S capture in two iron oxides

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Chernova, Elizaveta, Vladimir Botvin, Maria Galstenkova, et al. "A Comprehensive Study of Synthesis and Analysis of Anisotropic Iron Oxide and Oxyhydroxide Nanoparticles." Nanomaterials 12, no. 23 (2022): 4321. http://dx.doi.org/10.3390/nano12234321.

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One-dimensional anisotropic nanoparticles are of great research interest across a wide range of biomedical applications due to their specific physicochemical and magnetic properties in comparison with isotropic magnetic nanoparticles. In this work, the formation of iron oxides and oxyhydroxide anisotropic nanoparticles (ANPs) obtained by the co-precipitation method in the presence of urea was studied. Reaction pathways of iron oxide and oxyhydroxide ANPs formation are described based on of X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), scanning electron mi

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Mbuyazi, Thandi B., and Peter A. Ajibade. "Photocatalytic Degradation of Organic Dyes by Magnetite Nanoparticles Prepared by Co-Precipitation." International Journal of Molecular Sciences 25, no. 14 (2024): 7876. http://dx.doi.org/10.3390/ijms25147876.

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Iron oxide nanoparticles were synthesized by co-precipitation using three different iron salt stoichiometric mole ratios. Powder X-ray diffraction patterns revealed the inverse cubic spinel structure of magnetite iron oxide. Transmission electron microscopic images showed Fe3O4 nanoparticles with different shapes and average particle sizes of 5.48 nm for Fe3O4-1:2, 6.02 nm for Fe3O4-1.5:2, and 6.98 nm for Fe3O4-2:3 with an energy bandgap of 3.27 to 3.53 eV. The as-prepared Fe3O4 nanoparticles were used as photocatalysts to degrade brilliant green (BG), rhodamine B (RhB), indigo carmine (IC), a

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Choquehuanca, Astrid, José G. Ruiz-Montoya, and Adolfo La Rosa-Toro Gómez. "Discoloration of methylene blue at neutral pH by heterogeneous photo-Fenton-like reactions using crystalline and amorphous iron oxides." Open Chemistry 19, no. 1 (2021): 1009–20. http://dx.doi.org/10.1515/chem-2021-0077.

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Abstract Different iron oxides were evaluated for the discoloration of methylene blue (MB) at neutral pH by heterogeneous photo-Fenton-like reactions with a UV-LED lamp. Fe3O4, α-Fe2O3, and a-FeOOH catalysts were synthesized and characterized by X-ray diffraction, scanning electron microscopy (SEM), Raman spectroscopy, Fourier transform infrared spectroscopy, and adsorption isotherms of N2. The results show high crystallinity and relatively low surface areas for Fe3O4 and α-Fe2O3, and amorphous structure with high surface area for the case of a-FeOOH. The discoloration of MB by iron oxides as

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An, Meichun, Mohammad Abdul Aziz, and Yong Lak Joo. "Hybridization of Mesoporous Carbon and Iron Oxide for Better Mitigation of Polysulfide Shuttling in Li-S Batteries." ECS Meeting Abstracts MA2022-01, no. 7 (2022): 660. http://dx.doi.org/10.1149/ma2022-017660mtgabs.

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With a higher theoretical capacity, lithium-sulfur (Li-S) batteries have been considered as promising candidates for next-generation batteries. Due to the non-conducting nature of sulfur, however, lithium-sulfur batteries tend to exhibit poor performance at a high current rate (C-rate). Here we demonstrate that Fe3O4, synthesized from precursor iron (III) acetylacetonate (AAI), and mesoporous carbon material, Ketjen Black (KB), can be synergistically combined to enhance the electrochemical performance of lithium-sulfur batteries substantially. Instead of adding commercial magnetite particles i

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Hamed, Mai Hussein, David N. Mueller та Martina Müller. "Thermal phase design of ultrathin magnetic iron oxide films: from Fe3O4 to γ-Fe2O3 and FeO". Journal of Materials Chemistry C 8, № 4 (2020): 1335–43. http://dx.doi.org/10.1039/c9tc05921k.

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Thermodynamically “active” oxide interfaces alter the standard iron oxide phase diagram of complex heterostructures. By controlling the effective oxygen pressure, selected iron oxides phases can be designed through a thermal phase design.

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Skachkova, O., S. Antonuk, V. Orel, N. Khranovska, and M. Inomistova. "The influence of iron oxide nanoparticles on the viability of the generated human dendritic cells." Bulletin of Taras Shevchenko National University of Kyiv. Series: Problems of Physiological Functions Regulation 23, no. 2 (2017): 5–9. http://dx.doi.org/10.17721/2616_6410.2017.23.5-9.

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The aim of the study was to investigate the properties of generated dendritic cells (DC) from monocytes of peripheral blood loaded with nanoparticles (NP) of iron oxide. The results of cytological studies showed that the ability to absorb Fe3O4 iron NP in generated DCs of healthy donors and cancer patients did not differ. It was established that the most optimal concentration of Fe3O4 iron oxide NPs for loading of DCs was 8*10-12 mg/ml. It was shown that Fe3O4 iron oxide NPs practically does not affect viability, apoptosis and distribution of generated DCs along the phases of the cell cycle on

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Muşat, Viorica, Lenuța Crintea (Căpăţână), Elena-Maria Anghel, et al. "Ag-Decorated Iron Oxides-Silica Magnetic Nanocomposites with Antimicrobial and Photocatalytic Activity." Nanomaterials 12, no. 24 (2022): 4452. http://dx.doi.org/10.3390/nano12244452.

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Nanotechnology offers unlimited possibilities for creating effective hybrid materials, which combine functional performance in environment depollution and antimicrobial defense with a lack of toxicity, biocompatibility, biodegradability, and natural availability. This paper presents the silver effect on photocatalytic and antibacterial activities of double-coated iron oxide nanoparticles (NPs), Fe3O4@SiO2/ZnO-Ag. The structural, morphological, and textural information of the, core–shell iron oxides-based superparamagnetic nanoparticles (IOMNPs) decorated with 5% Ag by ultrasound-assisted synth

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Shan, Yan, Xing Ying Xu, Ke Zheng Chen, and Lian Gao. "Preparation and Characterization of Magnetic Graphene Oxide." Advanced Materials Research 774-776 (September 2013): 532–35. http://dx.doi.org/10.4028/www.scientific.net/amr.774-776.532.

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In this paper, the magnetic graphene oxide (Fe3O4@GO) has been successfully prepared by decomposition of Iron (III) acetylacetonate in the mixture solution of triethylene glycol and GO. atomic force microscope, TEM, XRD and superconducting quantum interference device were used to characterize the material. The results showed that the magnetic Fe3O4 nanoparticles modified graphene oxide has been obtained, and it has superparamagnetism with magnetization saturation of 16.4emu/g. the Fe3O4@GO has a good sustained-release performance, and vitro cytotoxicity confirmed that its security for Fe3O4@ G

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Ravita, Amita, Ashok Kumar, and Pawan S. Rana. "Effect of Annealing on Structural Properties of Fe3O4 Ferrite Nanoparticles." Advanced Science Letters 24, no. 8 (2018): 5748–51. http://dx.doi.org/10.1166/asl.2018.12190.

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Nano-crystalline Fe3O4 particles has been synthesized by chemical co-precipitation method. The synthesized samples were annealed at different temperature 300 °C, 500 °C, 700 °C. The effect of annealing temperature on structural properties of synthesized sample has been studied by various analytical techniques like X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope and Fourier transform infrared spectroscopy (FTIR). The X-ray diffraction patterns confirm the synthesis of single crystalline phase of Fe3O4 nanoparticles. The crystallite size of synthesiz

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Girma, Wubshet Mekonnen. "Synthesis of Carbon-Encapsulated Magnetic Iron Oxide Nanocomposites for Bioapplication." International Journal of Biomaterials 2022 (September 20, 2022): 1–5. http://dx.doi.org/10.1155/2022/3302082.

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Carbon-encapsulated Fe3O4 nanoparticles (NPs) were successfully synthesized from a single precursor using one-step solvothermal methods. X-ray diffraction and transmission electron microscopy were used to characterize the as-prepared NPs, and UV-visible absorbance spectroscopy was used to check their optical properties. The morphological results revealed that Fe3O4@C, quasi-spherical Fe3O4 particles encapsulated by carbon. In addition, the carbon-encapsulated Fe3O4 NPs were conjugated with folic acid (FA) to be used as biomarkers in the diagnosis and treatment of tumour cells. Fourier transfor

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Gutierrez, Frederico V., Anna De Falco, Elder Yokoyama, et al. "Magnetic Characterization by Scanning Microscopy of Functionalized Iron Oxide Nanoparticles." Nanomaterials 11, no. 9 (2021): 2197. http://dx.doi.org/10.3390/nano11092197.

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This study aimed to systematically understand the magnetic properties of magnetite (Fe3O4) nanoparticles functionalized with different Pluronic F-127 surfactant concentrations (Fe3O4@Pluronic F-127) obtained by using an improved magnetic characterization method based on three-dimensional magnetic maps generated by scanning magnetic microscopy. Additionally, these Fe3O4 and Fe3O4@Pluronic F-127 nanoparticles, as promising systems for biomedical applications, were prepared by a wet chemical reaction. The magnetization curve was obtained through these three-dimensional maps, confirming that both

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Taib, Nurul Izza, Famiza Abdul Latif, and Nur Diyana Syazwani Zambri. "Preparation and Characterization of Silica-Coated Iron Oxide Nanoparticles (Fe3O4@SiO2 NPs)." Scientific Research Journal 18, no. 1 (2021): 161. http://dx.doi.org/10.24191/srj.v18i2.11291.

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In this study, this SiO2 has been coated on the surface of Fe3O4 (Fe3O4@SiO2) by hydrolysis and condensation of tetraethyl orthosilicate (TEOS) under alkaline medium at 80oC. It was found that only 500 mL TEOS is required to obtain the best coated Fe3O4 core structures which has been confirmed from its TEM micrograph. FTIR analyses revealed the formation of Si-O-Si bonds at 1084.2–1101.4 cm-1 hence confirmed that SiO2 has been successfully coated the Fe3O4 core. From the FESEM analyses, the average size of silica was ~ 50 -70 nm. EDX of the Fe3O4@SiO2 showed that silica had been effectively bo

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Coker, Eric N., Mark A. Rodriguez, Andrea Ambrosini, James E. Miller, and Ellen B. Stechel. "Using in-situ techniques to probe high-temperature reactions: thermochemical cycles for the production of synthetic fuels from CO2 and water." Powder Diffraction 27, no. 2 (2012): 117–25. http://dx.doi.org/10.1017/s0885715612000255.

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Ferrites are promising materials for enabling solar-thermochemical cycles. Such cycles utilize solar-thermal energy to reduce the metal oxide, which is then re-oxidized by H2O or CO2, producing H2 or CO, respectively. Mixing ferrites with zirconia or yttria-stabilized zirconia (YSZ) greatly improves their cyclabilities. In order to understand this system, we have studied the behavior of iron oxide/8YSZ (8 mol-% Y2O3 in ZrO2) using in situ X-ray diffraction and thermogravimetric analyses at temperatures up to 1500 °C and under controlled atmosphere. The solubility of iron oxide in 8YSZ measured

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Tao, Cheng, Qiang Zheng, Lu An, et al. "T1-Weight Magnetic Resonance Imaging Performances of Iron Oxide Nanoparticles Modified with a Natural Protein Macromolecule and an Artificial Macromolecule." Nanomaterials 9, no. 2 (2019): 170. http://dx.doi.org/10.3390/nano9020170.

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To optimize the iron oxide nanoparticles as T1-weight contrast for in vivo magnetic resonance imaging (MRI), numbers of macromolecule ligands have been explored with considerable effort. However, reports refer to the comparison of the T1-weight contrast performances of iron oxide nanoparticles modified with natural and artificial macromolecule ligands are still limited. In this work, we used a typical natural protein macromolecule (bovine serum albumin, BSA) and an artificial macromolecule (poly(acrylic acid)-poly(methacrylic acid), PMAA-PTTM) as surface ligands to fabricate Fe3O4-BSA and Fe3O

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Kusrini, Eny, Khairu Nuzula, Anwar Usman, Lee D. Wilson, Cindy Gunawan, and Agus Budi Prasetyo. "Enhanced Cytotoxicity and Antifungal Effects of Iron-Oxide Chitosan/Samarium/Ranitidine Microparticles." Sains Malaysiana 54, no. 1 (2025): 3673–86. https://doi.org/10.17576/jsm-2025-5401-17.

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This study aimed to investigate the cytotoxicity and antifungal properties of Sm(NO3)3.6H2O salt, chitosan/Sm complex, iron oxide (Fe3O4 NPs), and iron-oxide modified chitosan/Sm/ranitidine microparticles. The microparticles of iron-oxide modified chitosan/Sm/ranitidine composites were synthesized from various masses of Sm(NO3)3.6H2O (250-350 mg), chitosan (2,000-2,500 mg), and (5-25 mg) through the microwave-assisted evaporation method. The Fe3O4 NPs and ranitidine/Sm were mixed with chitosan through a dispersion method by microwave. The toxicity studies of iron-oxide modified chitosan/Sm/ran

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Lavina, Barbara, and Yue Meng. "Unraveling the complexity of iron oxides at high pressure and temperature: Synthesis of Fe5O6." Science Advances 1, no. 5 (2015): e1400260. http://dx.doi.org/10.1126/sciadv.1400260.

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The iron-oxygen system is the most important reference of rocks’ redox state. Even as minor components, iron oxides can play a critical role in redox equilibria, which affect the speciation of the fluid phases chemical differentiation, melting, and physical properties. Until our recent finding of Fe4O5, iron oxides were assumed to comprise only the polymorphs of FeO, Fe3O4, and Fe2O3. Combining synthesis at high pressure and temperature with microdiffraction mapping, we have identified yet another distinct iron oxide, Fe5O6. The new compound, which has an orthorhombic structure, was obtained i

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Thanh Thuy, Nguyen Thi, Le Duc Anh, Nguyen Huu Tri, Cu Van Hoang, and Nguyen Anh Nhut. "Preparation and Characterization of Polyethylene Glycol Coating Iron Oxide Nanoparticles for Curcumin Delivery." Asian Journal of Chemistry 31, no. 8 (2019): 1719–23. http://dx.doi.org/10.14233/ajchem.2019.21941.

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The PEG-coated iron oxide nanoparticles (Fe3O4 NPs-PEG) was synthesized by coprecipitation and ultrasonication method. X-ray diffraction results exhibited that the average size of Fe3O4 NPs-PEG was 19.10 nm, which was further confirmed in TEM imaging. In addition, sonication time and curcumin concentration were studied to evaluate the efficiency of loading curcumin onto Fe3O4 NPs-PEG. Further, statistical optimization using response surface methodology (RSM) has shown curcumin concentration (0,01% w/v) and sonication time (21 min) for maximal curcumin loading (0.37 mg/g). Along with the magnet

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Yang, Shu-Chian, Chun-Yu Chen, Hung-Yu Wan, Szu-Ying Huang, and Ta-I. Yang. "Electroactive Composites with Block Copolymer-Templated Iron Oxide Nanoparticles for Magnetic Hyperthermia Application." Polymers 11, no. 9 (2019): 1430. http://dx.doi.org/10.3390/polym11091430.

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Cancer has been one of the leading causes of human death for centuries. Magnetic hyperthermia is a promising technique to confine and control cancers. However, particles used in magnetic hyperthermia leaking from where the cancers are located could compromise human health. Therefore, we developed electroactive iron oxide/block copolymer composites to tackle the leakage problem. Experimental results show that oleylamine-modified magnetic iron oxide (Fe3O4) particles and electroactive tetraaniline (TA) could be templated in the self-assembled microstructures of sulfonated [styrene-b-(ethylene-ra

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Seeharaj, Panpailin, Tanthip Eamsa-Ard, and Eakkasit Thasirisap. "Synthesis and Characterization of PolyHIPEs Composites with Silica and Iron Oxide Nanoparticles." Key Engineering Materials 659 (August 2015): 505–10. http://dx.doi.org/10.4028/www.scientific.net/kem.659.505.

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This study investigated the synthesis and modification of the properties of polyHIPEs by incorporating co-additives into the polymer matrix i.e. silica (SiO2)nanoparticles (1 wt%) to improve physical and mechanical properties and iron oxide (Fe3O4) nanoparticles (5, 10 and 15 wt%) to induce magnetic and heavy ion adsorption properties. PolyHIPEs composites were prepared in water in oil (w/o) emulsion system using the ratio of organic phase to aqueous phase of 20 to 80 vol%. The physical and mechanical properties of the polyHIPEs composites were found to decrease with SiO2 and Fe3O4 addition wh

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Al Nada Hussein, Qatar, Amerah Imran, and Mohammed Abdul Kadhim. "Removal effeciency of blue basic dye41 by using Fe₃O₄ magnetic nanomaterial." IOP Conference Series: Earth and Environmental Science 1325, no. 1 (2024): 012005. http://dx.doi.org/10.1088/1755-1315/1325/1/012005.

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Abstract The study was conducted in January 2023. The study used nano-iron oxide treatment, iron oxide coated with citric acid, and nano-iron oxide grafted with wheat hulls, in the adsorption of basic blue dye 41 from the medium. Three criteria are used: knowing the best time to remove the dye, the best medium that helps in the adsorption method, and the best concentration of the dye that can be removed the fastest. The results were as follows: The best time: Fe3O4 was (10.50) minutes with a 97% removal rate, NM-AC was 10 minutes with a 94% removal rate, NM-BO was 10 minutes with a 98% removal

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Jafari-Soghieh, Fariba, Behrooz Maleki, and Hossein Behniafar. "Effect of dendrimer-functionalized magnetic iron oxide nanoparticles on improving thermal and mechanical properties of DGEBA/IPD epoxy networks." High Performance Polymers 31, no. 1 (2017): 24–31. http://dx.doi.org/10.1177/0954008317749020.

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In this work, the effects of dendrimer-functionalized magnetic iron oxide nanoparticles (Fe3O4@D-NH2) on improving thermal and mechanical properties in epoxy networks (ENs) are investigated. Magnetic iron oxide nanoparticles are prepared by coprecipitation of iron (II) chloride tetrahydrate with iron (III) chloride hexahydrate. Poly(amido-amine) dendrimer is synthesized by Michael addition reaction from diethylenetriamine with methyl acrylate. The fabricated dendrimer has been used to stabilize and functionalize magnetic nanoparticles. Then, magnetic iron oxide nanoparticles are encapsulated w

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