scholarly journals Effect Of Al3 + Inclusion on Characterization Exploration, Magnetic and Anti-Cancer Properties of Cobalt Ferrite Nanoparticles Synthesised by Co-Precipitation Process

2020 ◽  
Vol 9 (3) ◽  
pp. 4191-4198
Keyword(s):  
Cobalt Ferrite ◽  
Aluminum Content ◽  
Surface States ◽  
Ferrite Nanoparticles ◽  
Precipitation Process ◽  
Cubic Phase ◽  
Bending Vibrations ◽  
Cobalt Ferrite Nanoparticles ◽  
Cytotoxicity Studies ◽  
Co Precipitation

In (CoFe2O4 ) nanoparticles are widely utilized in electronics and biomedicine. Undoped and Al doped cobalt ferrite nanoparticles were manufactured through cost operative co-precipitation process. X-ray diffraction analysis (XRD) showed single cubic phase of cobalt ferrite and a constant reduction of the lattice constant upon aluminum content. The scanning electron microscope (SEM) analysis acquired the uniform scale dispersion of the well crystallized grains. Optical band gaps (Eg ) were observed utilizing Transmittance spectra. Photo Luminescence (PL) studies displayed wide emission peak of energy 3.45 eV, credited to the charge recombination that is attributable to deep traps and lattice faults of confined surface states. Raman analysis proved the stretching of metal oxygen, active vibration of metal cation and bending vibrations. The vibrating sample magnetometry (VSM) analysis showed the coercivity (Hc ) and the saturation magnetization (Ms ) decline upon an rise in aluminum content. Cytotoxicity studies proved so as to the anticancer attributes of cobalt ferrite nanoparticles..

scholarly journals Synthesis and Characterization of a Core-shell Material Using YBa2Cu3O7-d and Cobalt Ferrite Nanoparticles

2019 ◽  
Vol 69 (12) ◽  
pp. 3345-3348
Author(s):  
Maria Colie ◽  
Dan Eduard Mihaiescu ◽  
Daniela Istrati ◽  
Adrian Vasile Surdu ◽  
Bogdan Vasile ◽  
...  
Keyword(s):  
Cobalt Ferrite ◽  
Nanostructured Material ◽  
Ferrite Nanoparticles ◽  
Precipitation Method ◽  
Core Shell ◽  
Shell Material ◽  
X Ray ◽  
Cobalt Ferrite Nanoparticles ◽  
Transmission Electron ◽  
Co Precipitation

In this paper we describe the synthesis of a core-shell material using yttrium superconducting ceramic material (YBCO) and cobalt ferrite nanoparticles in order to obtain a nanostructured material with magnetic properties. The advantages of such material aim the selective deposition of nanofilms oriented in magnetic fields. To obtain this core-shell material, the solutions of the nitrates were first obtained by dissolving the salts in demineralised water. The suspension with cobalt ferrite nanoparticles was obtained by co-precipitation method. To obtain YBa2Cu3O7-�- coated magnetic nanoparticles by autocombustion reaction the solutions of nitrates and citric acid were used. The ratio of the metal ions: Y:Ba:Cu was 1:2:3, and between the oxidant and the reducing agent was used a citrate / nitrate mass ratio equal with 0.7. The final material was analyzed by X-ray diffraction (XRD), electronic scanning microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), high resolution transmission electron microscopy (HRTEM) and vibrating sample magnetometer (VSM).

scholarly journals Preparation of Cobalt Ferrite Nanoparticles Using Fulvic Acid as A Capping Agent and Its Effect on Catalytic Activity

2020 ◽  
Vol 1 (2) ◽  
Author(s):  
Jinxing LI ◽  
Abdelrahman A. Badawy ◽  
Guanben DU ◽  
Xiaojian ZHOU ◽  
Hisham A. Essawy
Keyword(s):  
Catalytic Activity ◽  
Fulvic Acid ◽  
Cobalt Ferrite ◽  
Total Pore Volume ◽  
Ferrite Nanoparticles ◽  
Precipitation Process ◽  
Capping Agent ◽  
Ph Values ◽  
Co Precipitation ◽  
Enhanced Surface

Cobalt ferrite was prepared by co-precipitation from cobalt and iron soluble precursors in presence of fulvic acid at different pH values, namely, 6 and 8 and compared with the same preparation in absence of fulvic acid. The presence of fulvic acid is expected to bind metal ions through bridging before co-precipitation and mineralization. The extent of binding is determined according to the pH of the process. This influences the mineralization of the resulting cobalt ferrite and the crystallization/ordering of its lattice. In addition, the extent of residual ferric oxide is also a function of the efficiency of binding process. This route of modification for the co-precipitation process was found to be accompanied by enhanced surface area and total pore volume for most of the prepared samples. The involvement of these oxides as catalysts in the photo-catalytic degradation of phenol from wastewater was found to contribute very efficiently and the removal reached about 88% in some cases, which can be attributed to olation and oxolation process of the formed nanoparticles.

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