Nanoparticles with controllable sizes of ferrite spinel cofe2o4 were formed by thermal treatment of cobaltiron glycerolate. Hasanain, abdullah ceylan department of physics, quaidiazam university, islamabad, pakistan. Study of multifunctional nanocomposites formed by cobalt. Fabrication and characterisation of cobalt ferrite. Synthesis of cobalt ferrite nanoparticles via a solgel combustion method 215 in the interval of 20150oc, a 5. Nickel substituted cobalt ferrite nanoparticles with composition co1. Magnetic nanoparticles are a class of nanoparticle that can be manipulated using magnetic fields. Author links open overlay panel mahboubeh houshiar a fatemeh zebhi b zahra jafari razi a ali alidoust a zohreh askari a.
The molecule consists of chains of dglucoronic acid units joined by. Synthesis and magnetic investigation of cobalt ferrite. In this study, cobalt ferrite cofe2o4 and zinc cobalt ferrite nanoparticles zncofe2o4 were prepared to achieve high slp values by. Chemical modification of cobalt ferrite nanoparticles with. The cobalt ferrite cofe 2 o 4 samples of different particle size were successfully prepared by nitrate route. Synthesis and magnetic properties of cobalt ferrite cofe2o4 arxiv.
From xrd it confirms that cofe2o4 nano particles belongs to spinel type lattice of space group fd3m. Such particles commonly consist of two components, a magnetic material, often iron, nickel and cobalt, and a chemical component that has functionality. Structural, magnetic, and acidic properties of cobalt ferrite. Cobalt ferrite nanoparticles obtained by a coprecipitation and b hydrothermal processes. In the present investigation structural, electric, magnetic, and frequency dependent dielectric properties of ferrite nanoparticles nps where,, and 0. They observed that the magnetic properties of cobalt ferrite nanoparticles are strongly dependent on their size. Frequencydependent magnetic susceptibility of magnetite. Synthesis of cobalt ferrite cofe2o4 nanoparticles using.
So far, the efficiency of magnetic cobalt ferrite nanoparticles cofe2o4nps has not been investigated in the removal of fluoride ion from water. In the present study, cobalt ferrite nanoparticles are prepared through two co precipitation methods as well as two solgel auto combustion methods, and a. Cobalt ferrite is synthesized and utilized for dye removal as a semiconducting composite. Cobalt ferrite nanoparticles less price fast delivery. Simple synthesis and characterization of cobalt ferrite. Effects of magnetic cobalt ferrite nanoparticles on biological and artificial lipid membranes barbara drasler,1 damjana drobne, sara novak,1 janez valant,1 sabina boljte,1,4 lado otrin,1 michael rappolt,5,6 barbara sartori,5 ales iglic,7 veronika kraljiglic,8 vid sustar,9 darko makovec,3,10 saso gyergyek,10 matej hocevar,11 matjaz godec,11 jernej zupanc11university of.
Investigation and comparison of cobalt ferrite composite. Magnetic nanoparticles of cobalt ferrite have been synthesized by wet chemical method using stable ferric and cobalt salts with oleic acid as the surfactant. Synthetic ionexchange resins were used as hosts for the coprecipitation of cobalt ferrite where the nanopores of the resin acted as the constrained environment. Synthesis and magnetic properties of cobalt ferrite nanoparticles. Zinc substituted cobalt ferrite nanoparticles coxzn1xfe2o4, with x 0. The combination of magnetic and electrical properties makes ferrite useful in many technological application3. The xray diffraction xrd patterns of all the samples show the single phase spinel. The particle sizes of the as obtained samples were found to be 10 nm which increases upto 92 nm on annealing at oc. Size, structural, and magnetic properties were determined and compared using xray diffraction xrd, scanning electron microscopy sem, and vibrating sample magnetometer vsm. Synthesis and magnetic properties of cobalt ferrite cofe. Molecular coating of nanoparticles represents probably the most important and, at the same time, critical step to design new nanostructured magnetic materials.
Effects of magnetic cobalt ferrite nanoparticles on. To compare photocatalytic performance of its individual oxides, cobalt oxide and iron oxide were synthesized by the same route and applied to water treatment. A proofofprinciple alloptical magnetometer has been constructed based on the cobalt ferrite core polymer shell based nanocomposite material. To this end, a number of alternative approaches for the preparation of ferrite nanoparticles have been proposed to date 11.
Research article sonochemical synthesis of cobalt ferrite nanoparticles parthap. Interparticle interactions and magnetic anisotropy in. The peaks 220 and 311 reveal the formation of spinel phase in metal ferrite nanoparticles. Pdf dielectric behaviour of cobalt ferrite nanoparticles. As an vital member of ferrite family, cobalt ferrite cofe 2 o 4 nanoparticles show exclusive properties such as large magnetooptical coefficient and the magneto crystalline coefficient at ambient temperature. Preparation and characterization of nanosized cobalt. Research article sonochemical synthesis of cobalt ferrite.
The microstructure of the nanoparticles obtained was investigated by scanning microscopy with a help of remme102 microscope. Photocatalytic treatment of wastewater from azo dyes with semiconductors promises efficient method to refine water. Preparation of cobalt ferrite nanoparticles by hydrolysis of cobalt. A comparative study of the toxicity of polyethylene glycol. Monodisperse and stable cobalt ferrite cofe2o4 nanoparticles 5. Structural and electrical properties of manganese doped. Structural and magnetic properties of cobalt ferrite. We report in this paper the structural, temperature and the frequency dependent electrical properties, and the magnetoresistance of manganese doped cobalt ferrite nanoparticles, which may open up a new window in the.
Magnetic properties of cobalt ferrite nanoparticles pala. Crystalline, magnetic, cobalt ferrite nanoparticles were synthesized from an aqueous solution containing metal nitrates and polyvinyl pyrrolidone pvp as a capping agent by a thermal treatment followed by calcination at various temperatures from 673 to 923 k. Physiological remediation of cobalt ferrite nanoparticles. Synthesis of magnetic ferrite nanoparticles with high. The a s prepared powder of cobalt ferrite nanoparticles is annealed a t 550c for 4 hrs and the same powder was used for characterization and investigations of structural and electrical propert ies. Moholkar 1,2 department of chemical engineering, indian institute of technology guwahati, guwahati, assam, india center for energy, indian institute of technology guwahati, guwahati, assam, india. The constant density results are indicating the strong structure formation of metal ferrite nanoparticles. Osa cobalt ferrite nanoparticles polymer composites. Powder xray profile of cobalt ferrite nanoparticles 3. Introduction problems associated with heavy organic. This mixture was briefly stirred and added to a boiling solution of 1 m naoh 200. Structural and electrical properties of cobalt ferrite. According to magnetization studies, the magnetic moment of the silica coated cobalt ferrite sample was reduced to 15. Aiming to find new materials that can work as flocculant agents to asphaltenes, cobalt ferrite nanoparticles were chemically modified through acid.
Preparation of cobalt ferrite nanoparticles cofe 2 o 4 nps cobalt ferrite nanoparticles cofe 2 o 4 nps were prepared using the method described by deraz 2010, 2012. Solgel synthesis and characterization of zinc substituted. After nps were obtained, alkaline medium was removed and replaced with distilled water subsequent to magnetic decantation of the nps repeated three times, in order to obtain a stable dispersion of nanoparticles ferrofluid. Cobalt ferrite cofe2o4 nanoparticles were synthesized by a facile novel coprecipitation method with citrate as chelating agent. Cobalt ferrite nanoparticles and cobalt oxides coo and co3o4 to prepare their nanoparticles. The study of the magnetic properties of cobalt ferrite nanopowders was performed by vibrating magnetometry. Magnetic cobalt ferrite cofe2o4 nanoparticles were prepared by hydrolysis of nonaqueous cobaltironiii carboxylate solution with water. Effect of zn substitution on the magnetic properties of. The phase components of the synthesized transition metalsubstituted cobalt ferrite nanoparticles were. Biocompatibility of transition metalsubstituted cobalt.
In addition, the capacity of ferritin cages to accommodate and store the degradation products of cobalt ferrite nanoparticles was investigated. Functionalization of cobalt ferrite nanoparticles with alginate coating for biocompatible applications alginate is because alginic acid is composed of residue of dmannuronic acid, lglucoronic acid. In spite of the development of a variety of synthesis routes, the production of cobalt ferrite nanoparticles with desirable size and magnetic properties is still a challenge. Nanoparticles of co3o4 are promising materials for electronic devices, and laser ablation of co3o4 has been carried out only in the gas phase.
Silica coating of the cobalt ferrite nanoparticles was produced using tetraethylorthosilicate teos and ammonia solution. Superparamagnetic materials magnetize and demagnetize more easily than the other ones. The aim of the present work is to synthesize cobalt ferrite nanoparticles by solgel autocombustion method and to. Coprecipitation is one of the candid techniques to prepare spinel structured ferrite nanoparticles at low temperatures. While nanoparticles are smaller than 1 micrometer in diameter typically 1100 nanometers, the larger microbeads are 0. Synthesis and properties of nanosized stoichiometric cobalt ferrite. The structural characteristics of the calcined samples were determined by xray diffraction xrd, fourier transform infrared. Kunming spf mice female, 6 8weeks old were used to investigate the toxicity induced by cobalt ferrite nanoparticles and. The metal nitrate to citric acid ratio was taken as 1.
Synthesis and coating of cobalt ferrite nanoparticles. Frequencydependent magnetic susceptibility of magnetite and cobalt ferrite nanoparticles embedded in paa hydrogel susanne van berkum, joris t. Cobalt ferrite cofe 2 o 4 co ferrite nps were prepared by coprecipitation3739 and stabilized in water. These methods includes solgel, micro emulsion, chemical coprecipitation etc. Mechanosynthesis, characterization, and magnetic properties of nanoparticles of cobalt ferrite, cofe 2o 4 elina manova, boris kunev, daniela paneva, ivan mitov, lachezar petrov institute of catalysis, bulgarian academy of sciences, acad. Cobalt ferrite nanoparticles the cobalt ferrite nanoparticles were prepared by the method reported by tourinho et al. Structural, dielectric and magnetic properties of nickel. In this work the cobalt ferrite cofe 2 o 4 nanoparticles are synthesized using three different methods. Magnetic cofe2o4tio2nps containing titanium dioxidebased spinel ferrite can be retrieved and reused.
Highquality samples in the size range of 5 to 10 nm were produced using very low stirring speed 250 rpm and moderate alkaline aqueous solution concentration 4. The weight fraction of the particles within the resin was roughly 16%. Magnetic properties of cobalt ferrite nanoparticles synthesized by solgel method t george1, a t sunny2 and t varghese3 1 holy kings college of engineering and technology, pampakkuda 686 667, kerala, india 2 school of chemical sciences, m g university, kottayam 686 560, kerala, india 3nanoscience research centre nsrc, department of physics, nirmala college. Synthesis of magnetic ferrite nanoparticles with high hyperthermia. In brief, the calculated proportions of iron and cobalt nitrates with a known amount of glycine, with molar ratio of 2. Pdf cobalt ferrite nanoparticles cofe2o4 were synthesized by the. A method has been developed to prepare cobalt ferrite particle core polymer shell nanoparticles. Coo is also an important material, for example, it is known as a gas sensing material. Synthesis of cobalt ferrite cofe 2 o 4 nanoparticles using combustion, coprecipitation, and precipitation methods. The particle size of the nanoparticles was investigated using particle size analyzer, and the zeta potentials were measured using zeta potential analyzer. These engineered nanoparticles can be further embedded into a polymer host matrix to develop highly transparent polymer based magnetooptic materials.
Pdf synthesis and magnetic properties of cobalt ferrite. For this purpose, cobalt ferrite nanoparticles have been synthesized by the solgel process using citric acid ca and polyvinyl alcohol pva as chelating agents, and the effect of chelating agents on surface morphology, size distribution and antibacterial properties of the synthesized cobalt ferrite nanoparticles have been investigated. A comparison study of size, structural, and magnetic properties. Functionalization of cobalt ferrite nanoparticles with. The arbitrary direction of particles allows for a geometrial measure of the size distribution shown in fig.