Eco-friendly synthesis of magnetite (Fe 3 O 4 ) nanoparticles with tunable size: Dielectric, magnetic, thermal and optical studies

Bahadur, Ali; Saeed, Aamer; Shoaib, Muhammad; Iqbal, Shahid; Bashir, Muhammad Imran; Waqas, Muhammad; Hussain, Muhammad Nasir; Abbas, Nasir

doi:10.1016/j.matchemphys.2017.05.061

Cited by 84 publications

(37 citation statements)

References 29 publications

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“…The UV-vis spectra of Fe 3 O 4 MNPs (Figure 1B) indicate the absorption band between 400 and 420 nm characteristic for Fe 3 O 4 nanoparticles as reported elsewhere (Bahadur et al, 2017) and at about 300 nm reported previously for Fe 2 O 3 (Bian et al, 2017). Less intense absorption bands with intensity decreasing in the order of I > II > III ≈ V > IV and shifted to smaller wavelengths exhibit Fe 3 O 4 f-MNPs I–V samples due to adsorbed molecules.…”

Section: Resultssupporting

confidence: 85%

Surface Study of Fe3O4 Nanoparticles Functionalized With Biocompatible Adsorbed Molecules

et al. 2019

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Surfaces of iron oxide of ferrimagnetic magnetite (Fe3O4) nanoparticles (MNPs) prepared by Massart's method and their functionalized form (f-MNPs) with succinic acid, L-arginine, oxalic acid, citric acid, and glutamic acid were studied by dynamic light scattering (DLS), Fourier transform infrared spectroscopy (FTIR-S), UV-vis, thermogravimetric analysis (TGA)/differential scanning calorimetry (DSC), X-ray photoelectron spectroscopy (XPS), and reflection electron energy loss spectroscopy (REELS). The XPS analysis of elements and their chemical states at the surface of MNPs and f-MNPs revealed differences in chemical bonding of atoms, content of carbon–oxygen groups, iron oxide forms, iron oxide magnetic properties, adsorbed molecules, surface coverage, and overlayer thickness, whereas the Auger parameters (derived from XPS and Auger spectra) and elastic and inelastic scattering probabilities of electrons on atoms and valence band electrons (derived from REELS spectra) indicated modification of surface charge redistribution, electronic, and optical properties. These modified properties of f-MNPs influenced their biological properties. The surfaces biocompatible for L929 cells showed various cytotoxicity for HeLa cells (10.8–5.3% of cell death), the highest for MNPs functionalized with oxalic acid. The samples exhibiting the largest efficiency possessed smaller surface coverage and thickness of adsorbed molecules layers, the highest content of oxygen and carbon–oxygen functionalizing groups, the highest ratio of lattice O2− and OH− to C sp2 hybridizations on MNP surface, the highest ratio of adsorbed O− and OH− to C sp2 hybridizations on adsorbed molecule layers, the closest electronic and optical properties to Fe3O4, and the lowest degree of admolecule polymerization. This high cytotoxicity was attributed to interaction of cells with a surface, where increased content of oxygen groups, adsorbed O−, and OH− may play the role of additional adsorption and catalytic sites and a large content of adsorbed molecule layers of carboxylic groups facilitating Fenton reaction kinetics leading to cell damage.

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Section: Resultssupporting

confidence: 85%

Surface Study of Fe3O4 Nanoparticles Functionalized With Biocompatible Adsorbed Molecules

et al. 2019

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“…Changes in the relative abundance of each component in magnetite nanoparticles supported in Lewatit or BeetBead (Table 1) were somehow expected due to the marked change in nanoparticle morphology and sample color ( Figure 1a). 47 Nevertheless, both samples respond to an external magnetic field (see Figure 4b), in agreement with the expected magnetic properties of Fe3O4. The local concentration and the properties of the surrounding ions as well as the charge at the polymer surface could affect the characteristics of the NP due to electrostatic interactions.…”

Section: Synthesis and Characterization Of Polymer-supported Nanocatasupporting

confidence: 83%

Recoverable and Reusable Polymer Microbead-Supported Metal Nanocatalysts for Redox Chemical Transformations

Fernandes

Pavliuk

Paun

et al. 2020

ACS Appl. Nano Mater.

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Metal nanoparticles have been widely exploited in catalysis, but their full impact on the environment and human health is still under debate. Here we describe the one-step fabrication of recoverable and reusable polymer microbead-supported metal and metal oxide nanocatalysts for application in batch reactions and flow systems. Au, Ag and Fe3O4 nanoparticles were prepared directly at the surface of commercial benzylamine-coated spherical polymer beads in water by using low energy microwave radiation for 5 min. The functionalization of microbead surface with betalamic acid, an antioxidant from plant origin, before irradiation changes the morphology and catalytic properties of the grafted nanoparticles. No leaching of the active phase was observed during the application of these effective and ready-to-use nanocatalysts on the reduction of 4-nitrophenol and oxidation of dihydrorhodamine 123. The supported nanocatalysts were recovered by filtration and/or magnetic separation and reused up to three times without significant drop in catalytic performance. These results can stimulate the controlled and facile synthesis of recoverable microbead-supported magnetic and non-magnetic nanocatalysts that can be applied under myriad reaction conditions and reused multiple times.

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“…Finally, the pellets were grind again. [12][13][14][15] The crystal structure was characterized by X-ray diffraction (Philips X Pert Pro) in continuous scan mode with a copper anode (45K-30mA, Cu K α radiation: λ=1.54Å ) at room temperature in the 2θ range: 10°-90°.…”

Section: Materials Synthesis Nife 2 O 4 [Nf] Synthesismentioning

confidence: 99%

Electrical and magnetic response of a phosphate glass - NiFe2O4 composite. A novel magnetic sensor design

Ma¹,

Pratula²,

Ca³

et al. 2019

MSEIJ

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NiFe 2 O 4 spinel -phosphate (Bi-Ba-Li) glass composite was synthesized by solid-state reaction. New crystalline magnetic phases was developed inside the glassy matrix through a controlled heat treatment. New NF-LBPB4 magnetic nanocomposite material was study. Complex impedance analysis has shown that mobile ions inside the matrix induce the development of complementary crystalline phases resulting in a composite material with excellent magnetic response. An innovative homemade device was designed to test the nanocomposite magnetic response.

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Eco-friendly synthesis of magnetite (Fe 3 O 4 ) nanoparticles with tunable size: Dielectric, magnetic, thermal and optical studies

Cited by 84 publications

References 29 publications

Surface Study of Fe3O4 Nanoparticles Functionalized With Biocompatible Adsorbed Molecules

Surface Study of Fe3O4 Nanoparticles Functionalized With Biocompatible Adsorbed Molecules

Recoverable and Reusable Polymer Microbead-Supported Metal Nanocatalysts for Redox Chemical Transformations

Electrical and magnetic response of a phosphate glass - NiFe2O4 composite. A novel magnetic sensor design

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