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Journal articles on the topic 'Fe3O4'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Xiang, Hengli, Genkuan Ren, Yanjun Zhong, et al. "Fe3O4@C Nanoparticles Synthesized by In Situ Solid-Phase Method for Removal of Methylene Blue." Nanomaterials 11, no. 2 (2021): 330. http://dx.doi.org/10.3390/nano11020330.

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Fe3O4@C nanoparticles were prepared by an in situ, solid-phase reaction, without any precursor, using FeSO4, FeS2, and PVP K30 as raw materials. The nanoparticles were utilized to decolorize high concentrations methylene blue (MB). The results indicated that the maximum adsorption capacity of the Fe3O4@C nanoparticles was 18.52 mg/g, and that the adsorption process was exothermic. Additionally, by employing H2O2 as the initiator of a Fenton-like reaction, the removal efficiency of 100 mg/L MB reached ~99% with Fe3O4@C nanoparticles, while that of MB was only ~34% using pure Fe3O4 nanoparticles

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2

Sun, Li, Fu Tian Liu, Qi Hui Jiang, Xiu Xiu Chen, and Ping Yang. "Monodisperse Fe₃O₄/Fe Core/Shell Nanoparticles with Enhanced Magnetic Property." Advanced Materials Research 306-307 (August 2011): 410–15. http://dx.doi.org/10.4028/www.scientific.net/amr.306-307.410.

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Core/shell type nanoparticles with an average diameter of 20nm were synthesized by chemical precipitation method. Firstly, Monodisperse Fe3O4 nanoparticles were synthesized by solvethermal method. FeSO47H2O and NaBH4 were respectively dissolved in distilled water, then moderated Fe3O4 particles and surfactant(PVP) were ultrasonic dispersed into the FeSO47H2O solution. The resulting solution was stirred 2 h at room temperature. Fe could be deposited on the surface of monodispersed Fe3O4 nanoparticles to form core-shell particles. The particles were characterized by using various experimental

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3

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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4

Reknosari, Elen, Teguh Wirawan, and Soerja Koesnarpadi. "PHENOL ADSORPTION USING COMPOSITE ADSORBENT Fe3O4-ACTIVATED CHARCOAL COFFEE GROUNDS." JURNAL KIMIA MULAWARMAN 18, no. 1 (2020): 30. http://dx.doi.org/10.30872/jkm.v18i1.923.

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ABSTRACT  Phenol adsorption using composite adsorbent Fe3O4-activated charcoal coffee grounds has been done. Composite adsorbent Fe3O4 -activated charcoal coffee grounds are synthesized from FeSO4. 7H2O and FeCl3. 6H2O with a ratio of 3: 2 and then compiled with activated coffee charcoal. The composite adsorbent Fe3O4-activated coffee charcoal was characterized by Fourier Transform Infared (FTIR) and Scanning Electron Microscopy (SEM) as well as the adsorption test on phenol. The results of the characterization with Fourier Transform Infared (FTIR), peak 1604.77 cm-1 appeared showi

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5

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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6

Kim, Min, Seung-Cheol Jee, Jung-Suk Sung, and Avinash A. Kadam. "Supermagnetic Sugarcane Bagasse Hydrochar for Enhanced Osteoconduction in Human Adipose Tissue-Derived Mesenchymal Stem Cells." Nanomaterials 10, no. 9 (2020): 1793. http://dx.doi.org/10.3390/nano10091793.

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Hydrothermally carbonized sugarcane bagasse (SCB) has exceptional surface properties. Looking at the huge amount of SCB produced, its biocompatible nature, cheap-cost for carbonization, and its easy functionalization can give impeccable nano-biomaterials for tissue engineering applications. Herein, sugarcane bagasse was converted into hydrochar (SCB-H) by hydrothermal carbonation. The SCB-H produced was further modified with iron oxide (Fe3O4) nanoparticles (denoted as SCB-H@Fe3O4). Facile synthesized nano-bio-composites were characterized by SEM, HR-TEM, XRD, FT-IR, XPS, TGA, and VSM analysis

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7

Abdeen, Mai, Soraya Sabry, Hanan Ghozlan, Ahmed A. El-Gendy, and Everett E. Carpenter. "Microbial-Physical Synthesis of Fe and Fe3O4 Magnetic Nanoparticles Using Aspergillus niger YESM1 and Supercritical Condition of Ethanol." Journal of Nanomaterials 2016 (2016): 1–7. http://dx.doi.org/10.1155/2016/9174891.

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Magnetic Fe and Fe3O4 (magnetite) nanoparticles are successfully synthesized using Aspergillus niger YESM 1 and supercritical condition of liquids. Aspergillus niger is used for decomposition of FeSO4 and FeCl3 to FeS and Fe2O3, respectively. The produced particles are exposed to supercritical condition of ethanol for 1 hour at 300°C and pressure of 850 psi. The phase structure and the morphology measurements yield pure iron and major Fe3O4 spherical nanoparticles with average size of 18 and 50 nm, respectively. The crystal size amounts to 9 nm for Fe and 8 nm for Fe3O4. The magnetic propertie

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8

Wu, Bao Cai, and Chun Ming Liu. "Rust Layer Structure Analysis of Q235 Atmospheric Corraded in Tangshan Industrial Estate." Advanced Materials Research 476-478 (February 2012): 269–72. http://dx.doi.org/10.4028/www.scientific.net/amr.476-478.269.

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Metallic materials are corraded unavoidably with deterioration of eviroment in heavy industry cities. Transformation of rust layer structure of Q235 atmospheric corraded in Tangshan industrial estate was analyzed with instrumentalities of X-ray Diffraction (XRD), Scanning Electron Microscope (SEM) , EDS and so on. The results showed that corrosion outcomes of Q235 transformed from FeOOH and Fe3O4 to FeOOH, Fe3O4 and FeSO4 through insolation in one year.

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9

Wulandari, Retno Fitri, Dhea Paradita, Nandang Mufti, M. Tommy Hasan Abadi, Ahmad Taufiq, and Mujamilah. "Fe<sub>3</sub>O<sub>4</sub> Nanoparticles Prepared by Coprecipitations Method for Hyperthermia Therapy." Key Engineering Materials 940 (January 30, 2023): 73–80. http://dx.doi.org/10.4028/p-jh6d31.

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Magnetic nanoparticles (Fe3O4) have considerable attention in various biomedical applications such as biosensors, drug delivery systems in the body, magnetic resonance imaging (MRI), and hyperthermia therapy. Hyperthermia therapy uses heat controlled by applied AC (Alternating Current) magnetic to kill cancer cells. This research aims to determine the effect of changes in temperature caused by the AC magnetic field on the varied magnetic nanoparticle solution. The Synthesize of Fe3O4 used the coprecipitation method to produce Fe3O4 nanoparticles. Mass of Fe3O4 nanoparticles varied of 95 mg and

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10

Zhang, Junjie, Jilong Wang, Yaoming Fu, et al. "Nanoscale Fe3O4 Electrocatalysts for Oxygen Reduction Reaction." Molecules 30, no. 8 (2025): 1753. https://doi.org/10.3390/molecules30081753.

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This study presents a straightforward hydrothermal synthesis approach to fabricate uniform and highly dispersed nanoscale Fe3O4 electrocatalysts for the oxygen reduction reaction (ORR). FeSO4·7H2O is used as the precursor, and sodium dodecyl sulfate (SDS) is incorporated as a dispersing agent to optimize particle size and dispersion. The SDS concentration plays a crucial role in controlling the particle size and distribution, with higher SDS concentrations resulting in smaller, well-dispersed particles (30–40 nm), compared to the agglomerated particles formed without SDS. The Fe3O4 catalyst de

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11

Kustomo and Sri Juari Santosa. "Studi Kinetika dan Adsorpsi Zat Warna Kation (Metilen Biru) dan Anion (Metil Orange) pada Magnetit Terlapis Asam Humat." Jurnal Jejaring Matematika dan Sains 1, no. 2 (2019): 64–69. http://dx.doi.org/10.36873/jjms.v1i2.212.

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Sintesis magnetit terlapis asam humat (Fe3O4–HA) telah dilakukan untuk adsorpsi dari dua jenis zat warna, yaitu metilen biru (MB) dan metil orange (MO). Penelitian ini diawali dengan ekstraksi asam humat (HA) yang diperoleh dari hasil isolasi tanah gambut Rawa Pening, Ambarawa, Jawa Tengah dan dilanjutkan dengan sintesis Fe3O4–HA menggunakan metode kopresipitasi dengan agen pengendap NH4OH pada campuran garam FeSO4•7H2O, FeCl3•6H2O dan HA hasil ekstraksi. Fe3O4–HA hasil sintesis kemudian dikarakterisasi dengan spektroskopi FTIR dan difraktogram XRD. Proses adsorpsi dilakukan pada waktu keseimb

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12

Manickam, Minakshi, Pritam Singh, Touma B. Issa, Stephen Thurgate, and Kathryn Prince. "Electrochemical Behavior of LiFePO₄ in Aqueous Lithium Hydroxide Electrolyte." Key Engineering Materials 320 (September 2006): 271–74. http://dx.doi.org/10.4028/www.scientific.net/kem.320.271.

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The electrochemistry of olivine-type iron phosphate (FePO4) as a battery cathode material, in aqueous lithium hydroxide (LiOH), has been investigated. The material forms intercalated LiFePO4 reversibly on electroreduction/oxidation. The formation of Fe3O4 phase, in addition to the regeneration of FePO4 during reverse oxidation of LiFePO4, also occurs. In this regard, the mechanism of FePO4 discharge/charge in aqueous LiOH differs from that in non-aqueous solvents.

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13

Zhang, Mengmeng, Yamin Cheng, Zhiwei Li, Xiaohong Li, Laigui Yu, and Zhijun Zhang. "Biomass Chitosan-Induced Fe3O4 Functionalized Halloysite Nanotube Composites: Preparation, Characterization and Flame-Retardant Performance." Nano 14, no. 12 (2019): 1950154. http://dx.doi.org/10.1142/s1793292019501546.

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An inorganic–organic nanohybrid flame retardant, HNT@CS@Fe3O4, is prepared by Halloysite nanotubes (HNT) as nanotemplate, chitosan (CS) as char-forming agent and ferroferric oxide (Fe3O[Formula: see text] playing in a catalytic role, aiming to endow enhanced flame-retardant performance of its nanohybrid. Results show that HNT@CS@Fe3O4 nanohybrids have a corn-like structure and can significantly improve the flame retardancy and thermal stability of epoxy resin (EP). Especially, the initial thermal degradation temperature of EP/HNT@CS@Fe3O4 is significantly improved by [Formula: see text]C relat

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14

Huerta, A., H. A. Calderon, M. Umemoto, and M. E. Brito. "Spinodal Decomposition in Fe(1-X)O-Fe3o4 Sintered Ceramics." Microscopy and Microanalysis 6, S2 (2000): 366–67. http://dx.doi.org/10.1017/s1431927600034322.

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Ceramic materials in the system FeO-Fe3o4 have been produced by means of mechanical milling and sintering for application of their physical properties. Starting from powder mixtures of Fe and Fe3o4 or Fe and Fe2o4, as well as pure Fe3o4, a metastable solid solution of Fe and O has been produced. The amount of Fe dissolved varies according to the milling time and its initial content in the mixture. A protective Ar atmosphere is used in all stages of the milling process in order to avoid contamination. X-ray diffraction patterns show a clear displacement of the intensity maxima as a function of

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15

Veronica, Yessi, Astuti Astuti, and Sri Rahayu Alfitri Usna. "Sintesis dan Karakterisasi Nanokomposit Fe3O4@PEG:ZnO." Jurnal Fisika Unand 11, no. 1 (2022): 29–36. http://dx.doi.org/10.25077/jfu.11.1.29-36.2022.

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Telah dilakukan penelitian tentang sintesis dan karakterisasi sifat optik pada nanokomposit Fe3O4@PEG:ZnO. Sampel yang digunakan adalah Fe3O4, Fe3O4@ZnO (1:1), Fe3O4@ZnO (1:2), Fe3O4@PEG:ZnO (1:2), dan Fe3O4@PEG:ZnO (1:3). Metode yang digunakan untuk sintesis nanokomposit adalah metode presipitasi. Nanokomposit dikarakterisasi dengan menggunakan X-Ray Diffraction (XRD), Fourier Transform Infra (FTIR), UV-Vis Spectrometry, dan Particle Size Analyzer (PSA). Hasil karakterisasi XRD pada sampel dengan variasi Fe3O4, Fe3O4@ZnO 1:1, Fe3O4@ZnO 1:2, dan Fe3O4@PEG:ZnO 1:3 menunjukkan struktur besi oksi

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16

Осипова, Е. А., та С. В. Лебедев. "ИЗМЕНЕНИЕ СОДЕРЖАНИЯ ХЛОРОФИЛЛА В ПОБЕГАХ ПШЕНИЦЫ ПОД ДЕЙСТВИЕМ РАЗЛИЧНЫХ ФОРМ ЖЕЛЕЗА". Trace Elements in Medicine (Moscow) 22, s (2021): 54–55. http://dx.doi.org/10.19112/2413-6174-2021-s1-27.

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Целью настоящего исследования явилось определение содержания хлорофилла в побегах пшеницы, произрастающих под действием различных форм железа (Fe0 (80 ± 5 нм), Fe3O4 (ширина 50–80 нм, высота 4–10 нм), FeSO4•7Н2О, Fe2 (SO4)3•9Н2О). Экстракцию пигментов проводили 96%-ным этиловым спиртом на 7-й день, концентрацию хлорофиллов рассчитывали по уравнениям Вернона. Максимальный синтез хлорофилла а и b был характерен для ионных форм железа в концентрации 1∙10-3 г/л, наночастиц железа 1∙10-4 г/л и магнетита Fe3O4 при концентрации 1∙10-6 г/л. Отношение хлорофилла а к хлорофиллу b в надземной части пшени

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17

Jia, Jiajia, Guangbin Yang, Chunli Zhang, Shengmao Zhang, Yujuan Zhang, and Pingyu Zhang. "Effects of magnetic ionic liquid as a lubricant on the friction and wear behavior of a steel-steel sliding contact under elevated temperatures." Friction 9, no. 1 (2019): 61–74. http://dx.doi.org/10.1007/s40544-019-0324-0.

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AbstractA magnetic ionic liquid (abridged as MIL) [C6mim]5[Dy(SCN)8] was prepared and used as the magnetic lubricant of a steel-steel sliding pair. The tribological properties of the as-prepared MIL were evaluated with a commercially obtained magnetic fluid lubricant (abridged as MF; the mixture of dioctyl sebacate and Fe3O4, denoted as DIOS-Fe3O4) as a control. The lubrication mechanisms of the two types of magnetic lubricants were discussed in relation to worn surface analyses by SEM-EDS, XPS, and profilometry, as well as measurement of the electric contact resistance of the rubbed steel sur

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18

Liao, Zhi-Min, Han-Chun Wu, Jing-Jing Wang, et al. "Magnetoresistance of Fe3O4-graphene-Fe3O4 junctions." Applied Physics Letters 98, no. 5 (2011): 052511. http://dx.doi.org/10.1063/1.3552679.

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Zhao, Hong, Hai Li Wang, Li Jun Liang, Hong Feng Xu, and Jie Fu. "Preparation and Characterization of Fe₃O₄-Pt/C Electro-Catalysts for Zinc-Air Battery Cathodes." Advanced Materials Research 239-242 (May 2011): 1184–89. http://dx.doi.org/10.4028/www.scientific.net/amr.239-242.1184.

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Fe3O4 modified Pt/C electro-catalyst was synthesized and studied. Fe3O4 and Fe3O4 with carbon coating (designated as Fe3O4/C) were prepared by co-precipitation method and ethyl acetate pretreatment. Fe3O4 and Fe3O4/C were sprayed onto the Pt/C cathode surface. X-ray diffraction (XRD) and Transmission Electron Microscopy (TEM) results show that Fe3O4 and Fe3O4 with carbon coating nano-particles (Fe3O4/C) are distributed evenly and c.a. 11.2 nm and 14.3 nm, respectively. TEM images show that electrode surfaces with Fe3O4 and Fe3O4/C are of little difference from that with Pt/C only; Fe3O4/C is m

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20

Tonthat, Loi, Mone Kimura, Tomoyuki Ogawa, et al. "Development of gold-coated magnetic nanoparticles as a theranostic agent for magnetic hyperthermia and CT imaging applications." AIP Advances 13, no. 2 (2023): 025239. http://dx.doi.org/10.1063/9.0000592.

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In this study, we aim to develop gold-coated Fe3O4 nanoparticles (Fe3O4@Au NPs) as theranostic agents for magnetic hyperthermia and CT imaging applications. The Fe3O4 NPs were synthesized via thermal decomposition method, and the gold was then deposited onto the surface of Fe3O4 NPs by reducing gold acetate at 190 °C. The average sizes of Fe3O4 and Fe3O4@Au NPs were 5.2 nm and 6.1 nm, respectively, which are effectively removed by the kidneys. The magnetization of Fe3O4@Au NPs (9.7 emu/g-Fe3O4) at 300 K was much smaller than that of Fe3O4 NPs (52.4 emu/g-Fe3O4). The heating efficiency of Fe3O4

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21

Koesnarpadi, Soerja, Sri Juari Santosa, Dwi Siswanta, and Bambang Rusdiarso. "Humic Acid Coated Fe₃O₄ Nanoparticle for Phenol Sorption." Indonesian Journal of Chemistry 17, no. 2 (2017): 274. http://dx.doi.org/10.22146/ijc.22545.

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The coating Fe3O4 using humic acid (HA) to form HA-coated Fe3O4 (Fe3O4/HA) was conducted and applied for phenol sorption. Fe3O4/HA was prepared using co-precipitation method in an alkaline condition using ammonium hydroxide and the addition of HA with mass ratios of Fe3O4 and HA=20:1, 10:1, 10:2, 10:3. The HA from peat soil in Sambutan village, East Kalimantan, Indonesia and was extracted in NaOH 0.1 M solution. The FT-IR characterization indicated that the coating of HA on the surface of Fe3O4 was successfully synthesized by forming a bond between the carboxylate group of HA and iron of Fe3O4

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Sari, Ayu Ratna, Verry Andre Fabiani, and Nurhadini Nurhadini. "Efisiensi Adsorpsi Ion Logam Zink (II) Menggunakan Komposit Fe3O4/Kaolin Asal Bangka." Stannum : Jurnal Sains dan Terapan Kimia 3, no. 1 (2021): 22–29. http://dx.doi.org/10.33019/jstk.v3i1.2230.

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Penelitian mengenai efisiensi adsorpsi ion logam Zn2+ telah dilakukan menggunakan komposit Fe3O4-kaolin asal Bangka. Penelitian ini bertujuan untuk mengetahui karakteristik komposit Fe3O4-kaolin menggunakan FTIR dan XRD, menentukan efisiensi adsorpsi ion logam Zn2+ oleh kaolin alam teraktivasi, Fe3O4, dan komposit Fe3O4-kaolin (1:1, 1:2 dan 1:3) serta mengetahui pengaruh konsentrasi terhadap efisiensi adsorpsi ion logam Zn2+ oleh komposit Fe3O4-kaolin. Hasil analisis FTIR dan XRD menunjukkan bahwa komposit Fe3O4-kaolin berhasil disintesis. Berdasarkan hasil karakterisasi dengan FTIR pada Fe3O4

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23

Oktaviana, Deby Ayu. "PREPARATION OF MAGNETITE-FULVIC ACID (Fe3O4-FA) FROM PEAT SOIL AND APPLICATION TO ADSORB RHODAMINE-B." JURNAL KIMIA MULAWARMAN 18, no. 2 (2021): 96. http://dx.doi.org/10.30872/jkm.v18i2.964.

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Pada penelitian ini dilakukan preparasi adsorben Fe3O4 terlapis asam fulvat (Fe3O4-AF) dari tanah gambut dan diaplikasikan untuk mengadsorpsi zat warna rhodamin B. Sintesis Fe3O4-AF dilakukan dengan metode ko-presipitasi, karakterisasi meliputi analisis FTIR, XRD, SEM dan VSM serta mengetahui kondisi pH optimum adsorpsi rhodamin-B pada Fe3O4-AF. Adsorben Fe3O4-AF berhasil disintesis dengan menunjukkan munculnya spektra FTIR yang khas yakni gugus Fe-O, O-H, C-H, C=C dan C=O. Struktur kristal Fe3O4-AF tidak mengalami perubahan, morfologi permukaan berupa koloid rigid AF tertempel bulatan sferis

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Matsuda, Hiroshi, Hiroshi Sakakima, Hideaki Adachi, Akihiro Odagawa, and Kentaro Setsune. "Preparation and characteristics of 90° rotated biepitaxial Fe3O4 thin films." Journal of Materials Research 17, no. 8 (2002): 1985–91. http://dx.doi.org/10.1557/jmr.2002.0294.

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In-plane 90° rotated biepitaxial Fe3O4 thin films have been successfully prepared onto MgO (110) substrates using a CeO2 seed layer and their microstructure, electric, and magnetic properties were investigated. From the x-ray φ-scan measurements, the in-plane epitaxial relations were determined as 〈110〉Fe3O4//〈110〉MgO and 〈001〉Fe3O4//〈001〉MgO for the no-seeded Fe3O4 layer, and 〈001〉Fe3O4//〈110〉MgO and 〈110〉Fe3O4//〈001〉MgO for the CeO2 (110) seeded Fe3O4 layer. The CeO2 seed layer was found to rotate the upper Fe3O4 lattice at 90° upon normal axis to the layer against the no-seeded Fe3O4. The t

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Zhang, Xuan. "Preparation and Microwave Absorption Properties of Polyaniline and Magnetite Core-Shell-Structured Hybrid." International Journal of Polymer Science 2018 (October 24, 2018): 1–6. http://dx.doi.org/10.1155/2018/3417060.

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In this study, polyaniline and Fe3O4 (PAN@Fe3O4) hybrids are fabricated and their microwave absorption property is studied. PAN@Fe3O4 hybrids are fabricated by the in situ aniline polymerization at spherical of Fe3O4 which is prepared by the solvothermal process. Fourier-transform infrared spectrophotometer (FTIR), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) are applied to confirm the composition of the fabricated PAN@Fe3O4 hybrids. The morphologies of PAN@Fe3O4 hybrids are studied by scanning electron microscope (SEM) and transmission electron microscopy (TEM). The con

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Xu, Hetong, Jianhua Wang, Xin Hui, and Runan Zhang. "The synthesis of Fe₃O₄@SiO₂ superparamagnetic materials and mechanism of catalysis." Journal of Physics: Conference Series 2783, no. 1 (2024): 012045. http://dx.doi.org/10.1088/1742-6596/2783/1/012045.

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Abstract The superparamagnetic Fe3O4 was fabricated by the solvothermal synthesis, in which medium ferric chloride is the iron source and deoxidizer using as ethylene glycol. The core-shell material Fe3O4@SiO2 was fabricated by the scheme which was composed of Anhydrous ethanol, deionized water, ammonia water, and tetraethyl orthosilicate (TEOS). The structural and optical characteristics of the samples Fe3O4 and core-shell Fe3O4@SiO2 was detected by X-ray diffraction (XRD), transmission electron microscope (TEM), Vibrating sample magnetometer (VSM), and UV/VIS/IR spectrophotometer. The conclu

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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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Bai, Binger, Guanrong Cheng, Jian Chen, Xiaoping Chen, and Qizhao Wang. "Strong Magnetic p-n Heterojunction Fe3O4-FeWO4 for Photo-Fenton Degradation of Tetracycline Hydrochloride." Catalysts 14, no. 7 (2024): 453. http://dx.doi.org/10.3390/catal14070453.

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With the abuse of antibiotics, its pollution poses an increasing threat to the environment and human health. Effective degradation of organic pollutants in water bodies is urgent. Compared to traditional treatment methods, advanced oxidation processes that have developed rapidly in recent years are more environmentally friendly, efficient and applicable to a wider range of organic compounds. FeWO4 was used in this study as the iron-based semiconductor material to modify and optimize the material design. Fe3O4/FeWO4 composites were prepared by a two-step hydrothermal method. The crystal structu

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Pham, Thi Lan Huong, and Van Quang Nguyen. "Synthesis of Fe3O4@SiO2 core-shell nanocomposite for fast removal of methylene blue from water." Ministry of Science and Technology, Vietnam 65, no. 6 (2023): 67–72. http://dx.doi.org/10.31276/vjst.65(6).67-72.

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In this work, Fe3O4@SiO2 core-shell nanocomposites were successfully synthesised via a simple co-precipitation method. X-ray diffraction pattern of Fe3O4@SiO2 clearly shows the existence of a main phase of Fe3O4, beside an amorphous structure of SiO2. The core-shell Fe3O4@SiO2 with an average particle size in the range of 10-20 nm is observed by SEM and TEM images. FTIR spectrum illustrates the Fe-O and Si-O-Si bonds in the sample, indicating the formed nanocomposite of Fe3O4@SiO2. The brunauer, emmett and teller surface area analysis of the Fe3O4@SiO2 sample is 4 times higher than that of Fe3

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Min, Wang Kee, Chang Ho Lee, Yong Ho Park, and Ik Min Park. "Fabrication and Thermoelectric Properties of p-Type Bi₁Sb₄Te_7.5 Alloy Doped with Fe₃O₄." Materials Science Forum 510-511 (March 2006): 1086–89. http://dx.doi.org/10.4028/www.scientific.net/msf.510-511.1086.

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We investigated the effects of Fe3O4 (0~0.1 wt.%) on the thermoelectric properties of Bi1Sb4Te7.5 alloy prepared by mechanical alloying process. The Seebeck coefficient increased with Fe3O4 content, but the power factor decreased with Fe3O4 content because of the decreased electrical conductivity. The thermal conductivity decreased with Fe3O4. The carrier concentration measured by the Hall effect measurement decreased with Fe3O4. The thermal conductivity of 0.1 wt.% Fe3O4 alloy was 0.814 W/Km, 20%lower than that of Fe3O4 free alloy. As a result, the small addition of Fe3O4 improved the Z value

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31

van Dijken, Sebastiaan, Xavier Fain, Steven M. Watts, Kentaro Nakajima, and J. M. D. Coey. "Magnetoresistance of Fe3O4/Au/Fe3O4 and Fe3O4/Au/Fe spin-valve structures." Journal of Magnetism and Magnetic Materials 280, no. 2-3 (2004): 322–26. http://dx.doi.org/10.1016/j.jmmm.2004.03.030.

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Gao, Baoqing, Yao Feng, Xinmeng Chen, and Jie Zhang. "A new PLA–Tween composited drug-carrying C60–Fe3O4 multifunctional ultrasound contrast agent based on three kinds of lesions." RSC Advances 11, no. 49 (2021): 31015–29. http://dx.doi.org/10.1039/d1ra04936d.

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A PLA–Tween composited drug-carrying C60–Fe3O4 microbubble was designed and prepared. Using Fe3O4 as a targeting factor and C60 as a drug carrier, C60–Fe3O4–WF, C60–Fe3O4–NET and C60–Fe3O4–DOX targeted drug-loading complexes were obtained.

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Kadam, Avinash A., Bharat Sharma, Surendra K. Shinde, et al. "Thiolation of Chitosan Loaded over Super-Magnetic Halloysite Nanotubes for Enhanced Laccase Immobilization." Nanomaterials 10, no. 12 (2020): 2560. http://dx.doi.org/10.3390/nano10122560.

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This study focuses on the development of a nanosupport based on halloysite nanotubes (HNTs), Fe3O4 nanoparticles (NPs), and thiolated chitosan (CTs) for laccase immobilization. First, HNTs were modified with Fe3O4 NPs (HNTs-Fe3O4) by the coprecipitation method. Then, the HNTs-Fe3O4 surface was tuned with the CTs (HNTs-Fe3O4-CTs) by a simple refluxing method. Finally, the HNTs- Fe3O4-CTs surface was thiolated (-SH) (denoted as; HNTs- Fe3O4-CTs-SH) by using the reactive NHS-ester reaction. The thiol-modified HNTs (HNTs- Fe3O4-CTs-SH) were characterized by FE-SEM, HR-TEM, XPS, XRD, FT-IR, and VSM

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34

Saeed, Muhammad, Muhammad Usman, Majid Muneer, et al. "Synthesis of Ag-Fe3O4 nanoparticles for degradation of methylene blue in aqueous medium." Bulletin of the Chemical Society of Ethiopia 34, no. 1 (2020): 123–34. http://dx.doi.org/10.4314/bcse.v34i1.11.

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Fe3O4 known as magnetite is one of the oxides of iron which plays a major role in various fields of sciences. Fe3O4 was synthesized by precipitation method using NH3.H2O, FeCl2.4H2O and FeCl3.6H2O as precursor materials. For synthesis of 5% Ag-Fe3O4, the green synthetic method was used for immobilization of Ag nanoparticles on Fe3O4 using leaves extract of Calotropis gigantea plant. The synthesized Fe3O4 and 5% Ag-Fe3O4 were employed as catalyst in degradation of methylene blue. The photo catalytic activity of Fe3O4 was remarkably enhanced by doping of Fe3O4 with Ag nanoparticles. Advanced ins

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Zhang, Wenjuan, Yaxian Wang, Yulong Fei, et al. "One-Pot Synthesis of Magnetic Polypyrrole Nanotubes for Adsorption of Cr(VI) in Aqueous Solution." Advances in Materials Science and Engineering 2021 (October 26, 2021): 1–15. http://dx.doi.org/10.1155/2021/7068003.

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A novel and efficient route is proposed to fabricate Fe3O4/polypyrrole (Fe3O4/PPy) nanotubes via a one-pot process. The one-pot strategy involves the synthesis of Fe3O4/PPy nanotubes by oxidative polymerization of pyrrole (Py) monomer using Fe3+ as an oxidant in the presence of methyl orange (MO) and Fe3+ used as iron source to form Fe3O4 simultaneously in basic conditions without adding any additional iron source and oxidant. The effects of Fe3+ concentration on the morphology and adsorption capacity of the Fe3O4/PPy nanotubes were investigated. The Fe3O4/PPy nanotubes exhibit a tubular struc

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36

Simbolon, Silviana. "EFEK SONIKASI TERHADAP PROSES PEMBENTUKAN NANOPARTIKEL FE3O4 YANG DIMODIFIKASI DENGAN PEG-6000." Jurnal Teknik Mesin Cakram 1, no. 1 (2018): 29. http://dx.doi.org/10.32493/jtc.v1i1.1345.

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Abstrak: Pada penelitian ini, serbuk nanopartikel magnetit (Fe3O4) dengan penambahan PEG-6000 telah berhasil dipreparasi dengan struktur kubik. Serbuk disintesis pada suhu 70°C dengan metode kopresipitasi dan dilanjutkan proses sonikasi. Serbuk nanopartikel Fe3O4 memiliki dua fasa yaitu Fe3O4 sebagai fasa dominan dan γ-Fe2O3 sebagai fasa minor. Pada sampel Fe3O4 terjadi aglomerasi atau penggumpalan partikel dengan ukuran partikel sebesar 20-80 nm. Sementara itu, sampel Fe3O4 dengan penambahan PEG-6000 memiliki ukuran sebesar ±25 nm. Dengan adanya penambahan PEG-6000 pada sampel Fe3O4, garis bo

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Arshi, Nishat, Faheem Ahmed, Shalendra Kumar, et al. "Superparamagnetic Iron Oxide Nanoparticles (SPIONs) and Reduced Graphene Oxide (RGO) Based Nanocomposites Prepared by Low-Temperature Route and Their Anticancer Properties." Science of Advanced Materials 14, no. 8 (2022): 1312–19. http://dx.doi.org/10.1166/sam.2022.4329.

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In this work, a facile low temperature solution route was reported for the preparation of monodisperse Fe3O4 nanoparticles and their reduced graphene oxide (RGO) based nanocomposites and used as anticancer agents. X-ray diffraction spectroscopy XRD and Raman studies revealed the high crystalline nature of the Fe3O4 nanoparticles and the presence of characteristic peaks of RGO in Fe3O4/RGO nanocomposites. Transmission electron microscopy (TEM) micrographs showed the morphology of the RGO nanosheets decorated by Fe3O4 nanoparticles with sizes ranging from 10–15 nm. High resolution (HR)-TEM study

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Zhao, Dong Lin, Xian Wei Zeng, Qi Sheng Xia, and Jin Tian Tang. "Fe₃O₄/Polyaniline Nanoparticles with Core-Shell Structure and their Inductive Heating Property in AC Magnetic Field." Key Engineering Materials 334-335 (March 2007): 1189–92. http://dx.doi.org/10.4028/www.scientific.net/kem.334-335.1189.

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The magnetite (Fe3O4) nanoparticles were prepared by coprecipitation of Fe3+ and Fe2+ with aqueous NaOH solution. The Fe3O4/polyaniline (PANI) magnetic composite nanoparticles with core-shell structure with diameter of 30-50 nm were prepared via an in-situ polymerization of aniline in aqueous solution containing Fe3O4 magnetic fluid. The inductive heat property of Fe3O4/polyaniline composite nanoparticles in an alternating current (AC) magnetic field was investigated. The potential of Fe3O4/polyaniline nanoparticles was evaluated for localized hyperthermia treatment of cancers. The saturation

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Dhivya, S. Maria, S. M. Sathiya, Subramanian Mugesh, Maruthamuthu Murugan, and M. A. Jothi Rajan. "Evaluation of Antibacterial Potential of CS/Fe3O4 Nanocomposites Based Plate Count Method." Advanced Science Letters 24, no. 8 (2018): 5503–7. http://dx.doi.org/10.1166/asl.2018.12137.

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In this study, magnetite nanoparticles (Fe3O4 NPs) and Chitosan coated Fe3O4 nanocomposites (CS-Fe3O4 NCs) were synthesized by simple co-precipitation method under air atmosphere. The structure, Functional, morphology and magnetic property of synthesized samples have been analyzed. X-ray diffraction results confirmed NPs and CS-Fe3O4 Fe3O4 NCs were composed of pure magnetite and the peak positions were unchanged after the introduction of CS biopolymer. The FTIR studies authenticate the bonding of the CS polymer with Fe3O4 NPs. The morphological studies revealed that the nanoparticles are almos

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40

Li, Xiaoyang, Genwang Zhang, Binwei Wang, Tan Lin, Guo Wang, and Huixia Feng. "One-pot synthesis of polyaniline/Fe3O4 nanocomposite in ionicliquid: electrical conductivity and magnetic studies." E3S Web of Conferences 118 (2019): 01059. http://dx.doi.org/10.1051/e3sconf/201911801059.

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One-pot synthesis of polyaniline/Fe3O4 nanocomposite in 1-methyl-3-alkylcarboxylic acid imidazolium chloride ([CMMIm]Cl) ionic liquid (IL) was introduced for the first time in this work. Transmission electron microscopy (TEM), X-ray diffraction (XRD), four probes method and vibrating sample magnetometer (VSM) were used to explore the influence of IL on the structure, conductivity and magnetic properties of polyaniline/Fe3O4 composite. Compared with Fe3O4 particles prepared in water, the results show that Fe3O4 particles prepare in imidazolium-based ionic liquid were more regular in shape and d

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Zhang, Xiaojuan, Wenbin Cai, Lingyun Hao, Suli Feng, Qing Lin, and Wei Jiang. "Preparation of Fe3O4/Reduced Graphene Oxide Nanocomposites with Good Dispersibility for Delivery of Paclitaxel." Journal of Nanomaterials 2017 (2017): 1–10. http://dx.doi.org/10.1155/2017/6702890.

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The Fe3O4/reduced graphene oxide (Fe3O4/RGO) nanocomposites with good dispersibility were synthesized for targeted delivery of paclitaxel (PTX). Firstly, the superparamagnetic Fe3O4/functional GO nanocomposites were prepared via hydrothermal method in which GO sheets were modified by surfactant wrapping. The Fe3O4/RGO nanocomposites were successively prepared through the reduction of graphene oxide. The products were investigated by Fourier-transform infrared spectrum, X-ray diffraction, scanning electron microscopy, transmission electron microscopy, thermogravimetric analysis, and vibration s

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Asab, Goshu, Enyew Amare Zereffa, and Teshome Abdo Seghne. "Synthesis of Silica-Coated Fe3O4 Nanoparticles by Microemulsion Method: Characterization and Evaluation of Antimicrobial Activity." International Journal of Biomaterials 2020 (March 31, 2020): 1–11. http://dx.doi.org/10.1155/2020/4783612.

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Magnetite and silica-coated magnetite (Fe3O4) nanoparticles (NPs) were synthesized by water-in-oil (W/O) microemulsion method from hydrated ferric nitrate, ferrous sulfate precursors and ammonia a precipitating agent with the assistance of Tween-80 and SDS surfactants. The synthesized materials were characterized by X-ray diffraction, scanning electron microscopy, thermal analyzer, and infrared spectroscopy. X-ray diffraction pattern of Fe3O4 showed that particles were phase pure with a cubic inverse spinel structure and FT-infrared spectra confirmed the presence of Fe-O bond in tetrahedral an

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Tao, Cheng, Yanan Chen, Danli Wang, et al. "Macromolecules with Different Charges, Lengths, and Coordination Groups for the Coprecipitation Synthesis of Magnetic Iron Oxide Nanoparticles as T1 MRI Contrast Agents." Nanomaterials 9, no. 5 (2019): 699. http://dx.doi.org/10.3390/nano9050699.

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Considerable efforts have been focused on the exploitation of macromolecule ligands for synthesis of magnetic Fe3O4 nanoparticles as T1 magnetic resonance imaging (MRI) contrast agents, but studies that concern macromolecule ligands with different charges and coordination groups are still limited. Herein, we used poly(acrylic acid) (PAA), poly(allylamine hydrochloride) (PAH), and polyvinyl alcohol (PVA), which possess negative, positive and neutral charges with carboxylic acid, amino and hydroxyl groups respectively, as templates and stabilizers to fabricate Fe3O4 nanoparticles through copreci

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44

Rahmawati, Ema, and Nugrahani Primary Putri. "SINTESIS DAN KARAKTERISASI PANI/Fe3O4 MENGGUNAKAN Fe3O4 DARI PASIR BESI GUNUNG GALUNGGUNG JAWA BARAT." Inovasi Fisika Indonesia 13, no. 2 (2024): 45–50. https://doi.org/10.26740/ifi.v13n2.p45-50.

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Abstrak Pasir besi dari letusan gunung berapi memiliki kandungan magnetik Fe3O4 yang tinggi sehingga memiliki nilai ekonomi yang baik dan dapat dimanfaatkan sebagai penyerap gelombang, bahan elektroda dan lain sebagainya. Akan tetapi Fe3O4 memiliki sifat listrik yang kurang baik, sehingga perlu diberi tambahan bahan polimer yang dapat memperbaiki sifat listriknya. Bahan polimer tersebut salah satunya adalah polianilin (PANI). Polianilin merupakan bahan polimer yang memiliki sifat fisik dan kimia yang unik, terutama sifat listriknya. Tujuan dari penelitian ini untuk mengetahui struktur kristal,

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Chen, Xingtian, Shumin Du, Ruoyu Hong, and Huaiyin Chen. "Preparation of RGO/Fe3O4 Nanocomposites as a Microwave Absorbing Material." Inorganics 11, no. 4 (2023): 143. http://dx.doi.org/10.3390/inorganics11040143.

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The hydrophobic nanocomposites of reduced graphene oxide (RGO) and Fe3O4 (RGO/Fe3O4) were prepared by a one-pot process through co-precipitation under alkaline conditions. The microwave absorption performance of the RGO/Fe3O4 nanocomposites was analyzed according to their electromagnetic parameters. The results showed that the RGO/Fe3O4 nanocomposites displayed better absorbing performance than the pristine Fe3O4 nanoparticles, owing to the synergistic effect of Fe3O4 and RGO. The maximum reflection loss (RL) of the RGO/Fe3O4 nanocomposites with a thickness of 2 mm reached −45.7 dB at 13.3 GHz

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46

Wu, Hongjing, Jiaolong Liu, Hongsheng Liang, and Duyang Zang. "Sandwich-like Fe3O4/Fe3S4 composites for electromagnetic wave absorption." Chemical Engineering Journal 393 (August 2020): 124743. http://dx.doi.org/10.1016/j.cej.2020.124743.

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Liu, Lingyu, Xudong Zhu, Yanbo Zeng, et al. "An Electrochemical Sensor for Diphenylamine Detection Based on Reduced Graphene Oxide/Fe3O4-Molecularly Imprinted Polymer with 1,4-Butanediyl-3,3’-bis-l-vinylimidazolium Dihexafluorophosphate Ionic Liquid as Cross-Linker." Polymers 10, no. 12 (2018): 1329. http://dx.doi.org/10.3390/polym10121329.

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In this paper, we report a new composite of reduced graphene oxide/Fe3O4-ionic liquid based molecularly imprinted polymer (RGO/Fe3O4-IL-MIP) fabricated for diphenylamine (DPA) detection. RGO/Fe3O4-IL-MIP was prepared with RGO/Fe3O4 as supporter, ionic liquid 1-vinyl-3-butylimidazolium hexafluorophosphate ([VC4mim][PF6]) as functional monomer, ionic liquid 1,4-butanediyl-3,3’-bis-l-vinylimidazolium dihexafluorophosphate ([V2C4(mim)2][(PF6)2]) as cross-linker, and diphenylamine (DPA) as template molecule. Fourier transform infrared spectroscopy, thermal gravimetric analysis, scanning electron mi

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Fang, Fei Fei, Jae Lim You, and Hyoung Jin Choi. "Facile Synthesis of Conducting Polypyrrole/Non-Aggregated Magnetite Nanocomposites and their Magnetorheological Characteristics." Advanced Materials Research 47-50 (June 2008): 201–4. http://dx.doi.org/10.4028/www.scientific.net/amr.47-50.201.

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Large density of the dispersed phase in magnetorheological (MR) fluids has hindered operating MR test and their industrial application. This present work adopted Fe3O4 nanoparticles to prepare MR fluid because of their moderate density and good magnetic property. Furthermore, in order to resolve aggregation problem of Fe3O4 particles due to their nano-scaled size, conducting polypyrrole (PPY) was synthesized around naono-sized Fe3O4 particles via conventional oxidation polymerization. Weight ratio of PPY to Fe3O4 was adjusted to be 5% to avoid possible deterioration of the magnetic property of

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49

Xie, Sujing, George E. Sterbinsky, Bruce W. Wessels, and Vinayak P. Dravid. "Defect and Interfacial Structure of Heteroepitaxial Fe3O4/BaTiO3 Bilayers." Microscopy and Microanalysis 16, no. 3 (2010): 300–305. http://dx.doi.org/10.1017/s1431927610000255.

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AbstractThe defect and interfacial structure in a Fe3O4/BaTiO3 heteroepitaxial bilayer was investigated by scanning transmission electron microscopy. The results show that the Fe3O4 film grew epitaxially on BaTiO3. The orientation relationship between Fe3O4, BaTiO3 and MgO is [100]Fe3O4//[100]BaTi3O//[100]MgO and (010)Fe3O4//(010)BaTiO3//(010)MgO. An initial interfacial nucleation layer was formed that partially accommodated the lattice mismatch strain between BaTiO3 and MgO. This investigation indicates that the formation of this buffer layer provides a high-quality BaTiO3 surface for subsequ

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50

Weng, Ling, Ting Wang, Pei-Hai Ju, and Li-Zhu Liu. "Preparation and properties of polyimide/Fe3O4 composite foams." Pigment & Resin Technology 47, no. 2 (2018): 173–79. http://dx.doi.org/10.1108/prt-01-2017-0006.

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Purpose This paper aims to develope the electromagnetic interference shielding materials with high performance. To develop advanced polymer-based electromagnetic interference shielding materials with rather high temperature stability, good processability and moderate mechanical properties, the authors chose the polyimide (PI) foam as matrix and ferriferrous oxide (Fe3O4) as fillers to prepare the composite foams with lightweight and rather good electromagnetic interference shielding performance. Design/methodology/approach Some polyimide nanocomposite foams with Fe3O4 as fillers have been prep

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