Synthesis Of NiFe2O4 Nanoparticles Research Articles

Design and preparation of carissa edulis fruit extract capped with the NiFe2O4/MK30 and oxidation of the organic pollutants under visible light illumination

This study focuses on the synthesis of NiFe2O4 nanoparticles through a green synthesis approach using Carissa edulis fruit extract, which was then anchored onto a montmorillonite (MK30) clay substrate to enhance dye photodegradation. The synthesized nanocomposite was characterized using multiple analytical techniques, including X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), photoluminescence spectroscopy, BET surface area analysis, vibrating sample magnetometry (VSM), zeta potential measurement, field emission scanning electron microscopy (FESEM), high-resolution transmission electron microscopy (HR-TEM), and electrochemical impedance spectroscopy (EIS). HR-TEM revealed two distinct morphologies within the composite: cubic and irregular. This study further explored the photocatalytic activity of the composites in degrading contaminants such as rhodamine B and ciprofloxacin. Notably, the NiFe2O4/MK30 composite with 12 % NiFe2O4 loading (12FNM) demonstrated a high potential for generating OH and O−2 radicals, achieving an 89.8 % removal efficiency of Rhodamine B at 10 ppm concentration. Compared with conventional Fenton reactions, the photo-Fenton process achieved a superior removal efficiency of up to 99 %. Radical scavenging studies identified the role of hydroxyl and superoxide radicals in photolysis using benzoquinone, isopropyl alcohol, and EDTA as scavengers. Moving forward, research will focus on developing additional modification strategies to further enhance the photocatalytic efficiency of nickel ferrite.

Synthesis of NiFe2O4 Nanoparticles over the MIL-53 (Fe)/NaY Zeolite for the Sonodegradation of Toxic Organic Dyes from Water Solutions

Synthesis of NiFe2O4 Nanoparticles over the MIL-53 (Fe)/NaY Zeolite for the Sonodegradation of Toxic Organic Dyes from Water Solutions

Stability and cytotoxicity study of NiFe2O4 nanocomposites synthesized by co-precipitation and subsequent thermal annealing

In this article, NiFe2O4 nanoparticles (NPs) were prepared by co-precipitation method with subsequent thermal annealing leading to obtainment NPs with average sizes of 78 nm. Structure and magnetic analysis were performed by X-ray diffraction, transmission electron microscopy, Mössbauer spectroscopy and vibrating sample magnetometry techniques. Stability of NiFe2O4 NPs was evaluated in PBS solution during 20 days. The toxicity of prepared NPs was evaluated in vitro using different cancer cell lines: HeLa (cervical cancer cell), PC-3 (prostate cancer cell). Fibroblasts like cells of L929 obtained from subcutaneous adipose tissue of mouse were used as normal cells. Results indicate successful synthesis of NiFe2O4 NPs that exhibit low cytotoxicity in concentration range from 1 to 100 μg/ml. Presented physical and biological results indicate the possibility of application investigated magnetic nanoparticles in hyperthermia, targeted drug delivery, magnetic resonance imaging or cell separation.

Synthesis and characterization of chitosan coating of NiFe2O4 nanoparticles for biomedical applications

Nickel ferrite nanoparticle is a soft magnetic material whose appealing properties as well as various technical applications have rendered it as one of the most attractive class of materials; its technical applications range from its utility as a sensor and catalyst to its utility in biomedical processes. The present paper focuses first on the synthesis of NiFe2O4 nanoparticles through co-precipitation method resulting in calcined nanoparticles that were achieved at different times and at a constant temperature (773 k). Afterward, they were dispersed in water that was mixed by chitosan. Chitosan was bonded on the surface of nanoparticles by controlling the pH of media. In order to assess the structural and magnetic properties of nanoparticles, X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), and vibrating sample magnetometer (VSM) analyses were conducted at room temperature. As per the results of XRD analysis, the pure NiFe2O4 was synthesized. Additionally, nanoparticles grew in size by extending the calcination process duration. TEM micrographs were used to determine the size and shape of particle; the obtained results indicate that the particle size was in a range of 17–30 nm and of a circular shape. The proper chitosan covering was also indicated by FTIR results. The VSM analysis also revealed that the saturated magnetization of NiFe2O4 nanoparticles stood in a range of 29 emu/g and 45 Qe. A stable maximum temperature ranging from 30 to 42 was successfully achieved within 10 min. Also, a specific absorption rate of up to 8.4 W/g was achieved. The study results revealed that the SAR parameter of the coated nickel ferrite nanoparticle is more than that of pure nickel ferrite or cobalt ferrite nanoparticles.

The effects of fuel type in synthesis of NiFe2O4 nanoparticles by microwave assisted combustion method

In this study, it was investigated the effects of the used fuels on structural, morphological and magnetic properties of nanoparticles in nanoparticle synthesis with microwave assisted combustion method with an important method in quick, simple and low cost at synthesis of the nanoparticles. In this aim, glycine, urea and citric acid were used as fuel, respectively. The synthesised nanoparticles were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Brunauer-Emmet-Teller surface area (BET), and vibrating sample magnetometry (VSM) techniques. We observed that fuel type is quite effective on magnetic properties and surface properties of the nanoparticles. X-ray difractograms of the obtained nanoparticles were compared with standard powder diffraction cards of NiFe2O4 (JCPDS Card Number 54-0964). The results demonstrated that difractograms are fully compatible with standard reflection peaks. According to the results of the XRD analysis, the highest crystallinity was observed at nanoparticles synthesized with glycine. The results demonstrated that the nanoparticles prepared with urea has the highest surface area. The micrographs of SEM showed that all of the nanoparticles have nano-crystalline behaviour and particles indication cubic shape. VSM analysis demonstrated that the type of fuel used for synthesis is highly effective a parameter on magnetic properties of nanoparticles.

Investigation of the structural, optical and magnetic properties of nickel ferrite nanoparticles synthesized through modified sol–gel method

Nickel ferrite nanoparticles were successfully synthesized by through modify sol–gel method with the aid of nickel (II) nitrate, iron (III) nitrate, and lactose without adding external surfactant. Moreover, lactose plays role as capping agent, reducing agent, and natural template in the synthesis of NiFe2O4 nanoparticles. The as-synthesized NiFe2O4 nanoparticles were characterized by means of several techniques such as X-ray diffraction, scanning electron microscopy, energy dispersive X-ray microanalysis and UV–Vis diffuse reflectance spectroscopy. The magnetic properties of as-prepared NiFe2O4 nanoparticles were also investigated with vibrating sample magnetometer. To evaluate the photocatalyst properties of nanocrystalline NiFe2O4, the photocatalytic degradation of methyl orange under ultraviolet light irradiation was carried out.

Síntese e caracterização de nanopartículas de NiFe2O4 utilizando o método de sol-gel/combustão e combustão homogênea

O presente trabalho teve por finalidade a síntese de nanopartículas de NiFe2O4 utilizando o método de sol-gel/combustão e combustão homogênea. As nanopartículas foram caracterizadas por difração de raios X, ressonância magnética eletrônica (RME) e espectroscopia de infravermelho de transformada de Fourier (IV-FT). As medidas de raios X foram usadas para caracterizar e estimar o tamanho médio dos cristalitos. Nos espectros de infravermelho, são observadas a formação da fase ferrítica e a influência do tamanho médio de cristalitos em todas as amostras que apresentaram alto grau de cristalinidade, já que a banda de infravermelho na faixa de 600-550 cm-1 é característica por sítios tetraédricos da ferrita. Os espectros de ressonância magnética eletrônica mostram que as partículas sintetizadas possuem dimensão nanométrica.

Synthesis of NiFe2O4 nanoparticles by a low temperature microwave-assisted ball milling technique

Nanocrystalline NiFe2O4 particles with mean size of about 20 nm were directly synthesized by a novel microwave-assisted ball-milling approach, using basic nickel carbonate and iron powders as the raw materials. The results showed that an intermediate product Fe2Ni2(OH)8CO3·2H2O was formed by milling NiCO3·2Ni(OH)2·4H2O and Fe powders with microwave assistance, then this intermediate product further reacted to form NiFe2O4 nanocrystals. On the other hand, by using NiO and Fe2O3 as the raw materials, NiFe2O4 could not be able to form. NiFe2O4 nanocrystals could be directly synthesized without post-sintering by this process. This makes it a new promising approach for ferrite nanoparticle, which is simple and environmentally friendly.