Journal ArticleDOI
Synthesis and characterization of magnetite nanoparticles via the chemical co-precipitation method
Karat Petcharoen,Anuvat Sirivat +1 more
TLDR
In this article, the size of the magnetite nanoparticles was carefully controlled by varying the reaction temperature and through surface modification, which significantly affected the particle size, the electrical conductivity, and the magnetic properties.Abstract:
Magnetite nanoparticles were synthesized via the chemical co-precipitation method using ammonium hydroxide as the precipitating agent. The size of the magnetite nanoparticles was carefully controlled by varying the reaction temperature and through the surface modification. Herein, the hexanoic acid and oleic acid were introduced as the coating agents during the initial crystallization phase of the magnetite. Their structure and morphology were characterized by the Fourier transform infrared spectroscopy (FTIR), the X-ray diffraction (XRD) and the field-emission scanning electron microscopy (FE-SEM). Moreover, the electrical and magnetic properties were studied by using a conductivity meter and a vibrating sample magnetometer (VSM), respectively. Both of the bare magnetite and the coated magnetite were of the cubic spinel structure and the spherical-shaped morphology. The reaction temperature and the surface modification critically affected the particle size, the electrical conductivity, and the magnetic properties of these particles. The particle size of the magnetite was increased through the surface modification and reaction temperature. In this study, the particle size of the magnetite nanoparticles was successfully controlled to be in the range of 10–40 nm, suitable for various biomedical applications. The electrical conductivity of the smallest particle size was 1.3 × 10−3 S/cm, within the semi-conductive materials range, which was higher than that of the largest particle by about 5 times. All of the magnetite nanoparticles showed the superparamagnetic behavior with high saturation magnetization. Furthermore, the highest magnetization was 58.72 emu/g obtained from the hexanoic acid coated magnetite nanoparticles.read more
Citations
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Journal ArticleDOI
Synthesis, characterization, applications, and challenges of iron oxide nanoparticles
Attarad Ali,Hira Zafar,Muhammad Zia,Ihsan-ul Haq,Abdul Rehman Phull,Joham Sarfraz Ali,Altaf Hussain +6 more
TL;DR: This review summarizes the methods for the preparation of iron oxide NPs, size and morphology control, and magnetic properties with recent bioengineering, commercial, and industrial applications.
Journal ArticleDOI
Iron oxide nanoparticles: Diagnostic, therapeutic and theranostic applications.
Seyed Mohammadali Dadfar,Karolin Roemhild,Natascha Drude,Saskia von Stillfried,Ruth Knüchel,Fabian Kiessling,Twan Lammers,Twan Lammers,Twan Lammers +8 more
TL;DR: The synthesis, surface functionalization and characterization of iron oxide nanoparticles, as well as their (pre‐) clinical use in diagnostic, therapeutic and theranostic settings, are summarized.
Journal ArticleDOI
Magnetic magnetite (Fe3O4) nanoparticle synthesis and applications for lead (Pb2+) and chromium (Cr6+) removal from water.
TL;DR: Fe3O4 nanoparticles are promising potential adsorbents and exhibited remarkable reusability for metal ions removal in water and wastewater treatment.
Journal ArticleDOI
Green synthesized iron nanoparticles by green tea and eucalyptus leaves extracts used for removal of nitrate in aqueous solution
Ting Wang,Jiajiang Lin,Zuliang Chen,Zuliang Chen,Zuliang Chen,Mallavarapu Megharaj,Mallavarapu Megharaj,Ravendra Naidu,Ravendra Naidu +8 more
TL;DR: In this paper, the authors used green tea (GT-Fe) and eucalyptus leaves (EL-Fe extracts, which regarded as cleaner productions can be used for the efficient removal of nitrate.
Journal ArticleDOI
Surface Modification of Magnetic Iron Oxide Nanoparticles.
Nan Zhu,Haining Ji,Peng Yu,Jiaqi Niu,M. U. Farooq,M Waseem Akram,I O Udego,Handong Li,Xiaobin Niu +8 more
TL;DR: This review summarizes recent advances in the surface modification of IONPs with small organic molecules, polymers and inorganic materials and their limitations in practical applications.
References
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Journal ArticleDOI
Size-Controlled Synthesis of Magnetite Nanoparticles
Shouheng Sun,Hao Zeng +1 more
TL;DR: The reported procedure can be used as a general approach to various ferrite nanoparticles and nanoparticle superlattices.
Journal ArticleDOI
Magnetic nanoparticles for drug delivery
TL;DR: The problems and recent advances in the development of magnetic NPs for drug delivery are reviewed, focusing particularly on the materials involved.
Journal ArticleDOI
Oleic acid coating on the monodisperse magnetite nanoparticles
Ling Zhang,Rong He,Hongchen Gu +2 more
TL;DR: In this paper, Oleic acid (OA)-coated magnetite nanoparticles of 7 and 19 µm were obtained by the seed-mediated high temperature thermal decomposition of iron(III) acetylacetonate (Fe(acac) 3 ) precursor method.
Journal ArticleDOI
Montmorillonite-supported magnetite nanoparticles for the removal of hexavalent chromium [Cr(VI)] from aqueous solutions
TL;DR: Fundamental results demonstrate that the montmorillonite-supported magnetite nanoparticles are readily prepared, enabling promising applications for the removal of hexavalent chromium from aqueous solution.
Journal ArticleDOI
Preparation and properties of magnetic Fe3O4–chitosan nanoparticles
TL;DR: In this paper, the covalent binding of chitosan (CTS) onto the surface of magnetic Fe3O4 nanoparticles which were prepared by hydrothermal method using H2O2 as an oxidizer.
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