Ferrite Nanostructures Research Articles

The Effect of Chitosan Surface Coating on the Properties of Zinc Ferrite Nanostructures by Sol-Gel Auto-Combustion Method Suitable for Biomedical Application

The Effect of Chitosan Surface Coating on the Properties of Zinc Ferrite Nanostructures by Sol-Gel Auto-Combustion Method Suitable for Biomedical Application

Anticancer, Anti-inflammatory, Anti-oxidant, Structural, Magnetic, and Photoluminescence studies of Eu2 + substituted in CuZnFe2O4 for nano-ferrites for biological applications

In the present study, the synthesis of copper -zinc doped europium nano in the stoichiometric ratios (Cu0.75Zn0.25EuxFe2-xO4, where x = 0, 0.05, 0.10, 0.15, 0.20, and 0.25) ferrite is synthesized through the sol-gel method, and characterized through several characterizations like XRD, FTIR, SEM, TEM, VSM, UV-Visible, Anti-cancer studies of triple-negative breast cancer MDAMB-231, Anti-inflammatory, Anti-oxidant. XRD confirms that the samples have cubic spinel structures with an Fd-3m space group. And the crystallite size is confirmed where it lies between 13-28 nm. According to XRD measurements, the samples are single-phase, with crystallite diameters ranging from 13 nm to 28 nm. The Rietveld refinement was performed using FullProf software to determine the structural parameters of the cubic spinel system Cu0.75Zn0.25EuxFe2-xO4 doped with Eu3+ at varying concentrations, where (x = 0, 0.05, 0.1, 0.15, 0.20, 0.25). These single-phase nanostructured ferrites show extended lattice characteristics, depending on the doping concentration of Eu²⁺. The SEM analyses determined the average particle size of the synthesized materials, and this value agrees with the PXRD and TEM results. The impact of dopants on vibrational modes and chemical bonding was investigated using FTIR spectroscopy. The UV-visible investigation found the direct energy band gap, ranging from 2.25 to 1.17 eV. The synthesized chemical has ferromagnetic characteristics, according to the VSM study. Higher concentrations of Eu dopant cause an intensification in photoluminescence (PL), which is indicative of changes to the electronic structure of the material that Favor's luminescence. Because of their special magnetic and optical characteristics, copper-zinc-europium-doped ferrites have become attractive candidates for anti-inflammatory, anti-cancer, and antioxidant medications.

Recent Developments in the Use of Spinel Ferrite Nanoparticles as Catalysts in Organic Reactions

: The unique physicochemical properties, low cost, low toxicity, and size- and shape-dependent magnetic properties of the ferrite-based nanoparticles make them an indispensable choice of material for various applications, including catalysis. : The objective of this review is to summarize the results of the most widely used ferrite nanoparticles such as NiFe2O4, CuFe2O4, CoFe2O4, ZnFe2O4, and MnFe2O4 as catalysts in organic reactions such as C–X (X = N, O, and S) coupling, oxidation, and N-heterocycles formation reactions. : This review includes a well-summarized compilation of the most widely used nanostructured ferrites such as NiFe2O4, CuFe2O4, CoFe2O4, ZnFe2O4, and MnFe2O4 as heterogeneous catalysts in selected organic reactions such as C–X (X = N, O, and S) coupling, oxidation, and N-heterocycles formation reactions. The nanostructured magnetic ferrite catalysts are reliable and extremely effective and facilitate the quick separation of catalysts, making the process sustainable. : The presentation of the review has been proposed anticipating new perspectives and insight in the field of catalysis and to investigate further development of novel ferrite materials on an industrial scale for practical applications.

Pyrolytic carbon decorated cobalt ferrite nanostructures as a negative electrode material for improved supercapacitor applications

Cobalt ferrite (CoFe2O4) magnetic nanoparticles (MNPs) are prepared by chemical oxidation method with optimized experimental parameters and carbon modified by simple pyrolysis process with the help of sucrose sugar solutions. The phase and morphology analysis from XRD, FESEM and TEM revealing that the post annealing for the carbon formation is not affecting crystalline phase. The attachment of carbon on CoFe2O4 MNPs for the nanocomposite formation is confirmed from the FESEM and TEM micrographs. The saturation magnetization of bare CoFe2O4 MNPs is observed as 77 and it decreases to 65 emu/g for the carbon composite. The highest specific capacitance of 318 F/g is achieved for the nanocomposites formed at 400 °C. The electrochemical and magnetic characteristics of the carbon nanocomposites reveals that it could be used as a better candidate in the area of negative electrode materials for the magnetic field assisted electrochemical supercapacitor applications.

Magnetic zinc ferrite nanostructures: Recent advancements for environmental and biomedical applications

Fabrication of spinel ferrite nanomaterials has gained immense attention in environmental and biomedical applications owing to their excellent magnetic properties. Among different spinel ferrites, zinc ferrite (ZnFe2O4) nanomaterials are promising transition metal oxide ferrites with excellent magnetic properties and biocompatibility. This review discusses the size and morphology-dependent physicochemical properties of ZnFe2O4 nanostructures and their correlation with the environmental and biomedical fields. Next, we provide a comprehensive overview of various synthesis and characterization techniques for fabricating ZnFe2O4 nanostructures. Examples of ZnFe2O4 nanomaterials and their nanocomposites used for environmental remediation, drug delivery, cancer theranostics, anticancer activity, imaging, biosensing, and gene therapy are further discussed. Finally, this review article offers insights into ZnFe2O4 nanostructures with their impacts, opportunities, and challenges for the future progress of environmental and biomedical applications.

Experimental characterization, computational investigation, and structure-property–activity relationship studies of Nickel Ferrite nanostructures

Experimental characterization, computational investigation, and structure-property–activity relationship studies of Nickel Ferrite nanostructures

Probing the influence of morphological variations on the electrochemical properties of cobalt ferrite nanostructures produced by pulsed laser deposition

A higher surface-to-volume ratio typically enhances capacitance in supercapacitor electrodes. However, excessive porosity can increase electrical resistance, counteracting this benefit. This study optimized the compaction level of CFO (Cobalt Ferrite Oxide) nanoparticles for enhanced supercapacitor performance. Nanoparticle-assembled CFO films with varying compaction were produced via pulsed laser deposition while maintaining consistent crystal structure and particle size. Characterization using electron microscopy and electrochemical techniques revealed a strong correlation between compaction and capacitance. All CFO nanoparticle-assembled films exhibited superior pseudocapacitive behavior compared to CFO thin films, with the most compacted nanoparticle-assembled film achieving a high areal capacitance of 6 mF cm−2.

Tailoring magnetism in chromium-doped zinc cobalt ferrite nanostructure for advanced spintronic memory devices

Soft magnetic ferrites serve as a crucial component in a wide array of sensing and actuating applications across various industries, including consumer electronics, automotive systems, spintronics, and more. These materials also find utility in spintronics, particularly for next-generation magnetic random-access memory (MRAM) due to their excellent inductive properties, which enhance the performance and scalability of spintronic memory devices. This study focuses on fine-tuning soft magnetic ferrites for inductive applications by doping them with Cr ions. By utilizing advanced experimental techniques such as the vibrating sample magnetometer (VSM) for bulk magnetometry and X-ray magnetic circular dichroism (XMCD) alongside X-ray absorption spectroscopy for atomic studies, the research aims to investigate the structural, electronic, and magnetic properties of the nanoferrites. Addition of doping in the soft ferrites observes reduction in the general magnetic parameters, with the only exception being coercivity, which decreases from 381 Oe to 275 Oe as the doping concentration increases from x = 0 to x = 0.02, and then increases to 350 Oe at x = 0.03. Through such precise tuning of the nanoparticles, this study aims to investigate the controllable soft magnetic properties of the nanoferrites, thereby paving the way for fast access times, non-volatility, and low energy consumption, presenting a compelling alternative to conventional memory technologies.

Novel synthesis and magnetic evaluation of carbonaceous cobalt spinel ferrite nanostructures

Novel synthesis and magnetic evaluation of carbonaceous cobalt spinel ferrite nanostructures

Ferrite nanostructures as promising candidates for voltammetric monitoring of the tumor marker vanillylmandelic acid

Ferrite nanostructures as promising candidates for voltammetric monitoring of the tumor marker vanillylmandelic acid

Exchange Bias Effects in Bismuth Ferrite Nanostructures Produced by Pulsed Laser Deposition

Exchange Bias Effects in Bismuth Ferrite Nanostructures Produced by Pulsed Laser Deposition

Synthesis and Characterization of Nickel Ferrite Nanostructures by DC Reactive Sputtering Technique Using New Target Configuration

Synthesis and Characterization of Nickel Ferrite Nanostructures by DC Reactive Sputtering Technique Using New Target Configuration

Design of zinc-doped copper ferrite nanostructures using microwave combustion process and its supercapacitive features

Design of zinc-doped copper ferrite nanostructures using microwave combustion process and its supercapacitive features

Study the Effect of Calcined Temperature on Structural, Optical and Magnetic Properties for Cobalt Ferrite Nanostructure

In this work, CoFe2O4 nanostructure was synthesized from Cobalt and ferric nitrates and sodium hydroxide (NaOH) by hydrothermal method. Effect of heat treatment on the structural, optical, and magnetic properties of the resulting powder was studied at calcination 400°C and 600°C with different concentration of NaOH. The resulted products were characterized by X-ray diffraction (XRD), Field emission scanning electron microscopy (FE-SEM), Fourier transformed infrared (FTIR), UV–Vis absorption, and vibrating sample magnetometer (VSM) technique as synthesis and when calcination at 400°C and 600°C with different concentration of NaOH. The absorption spectra show CoFe2O4 nanostructure absorb the ultra violet area. The high temperatures of the calcination process results in the reduction in crystallite size that their average crystallite size is found (11-14.26) nm. The FE-SEM images indicated that particles were agglomerated and spherical shape and size between (23.6 - 57.9) nm expect the morphology is clearly a structure nanorods at 3M at 400 oC. The created CoFe2O4 nanostructure have demonstrated ferromagnetic behavior for all the samples behavior which was found in VSM results examination.

Study the Effect of Calcined Temperature on Structural, Optical and Magnetic Properties for Cobalt Ferrite Nanostructure

In this work, CoFe2O4 nanostructure was synthesized from Cobalt and ferric nitrates and sodium hydroxide (NaOH) by hydrothermal method. Effect of heat treatment on the structural, optical, and magnetic properties of the resulting powder was studied at calcination 400°C and 600°C with different concentration of NaOH. The resulted products were characterized by X-ray diffraction (XRD), Field emission scanning electron microscopy (FE-SEM), Fourier transformed infrared (FTIR), UV–Vis absorption, and vibrating sample magnetometer (VSM) technique as synthesis and when calcination at 400°C and 600°C with different concentration of NaOH. The absorption spectra show CoFe2O4 nanostructure absorb the ultra violet area. The high temperatures of the calcination process results in the reduction in crystallite size that their average crystallite size is found (11-14.26) nm. The FE-SEM images indicated that particles were agglomerated and spherical shape and size between (23.6 - 57.9) nm expect the morphology is clearly a structure nanorods at 3M at 400 oC. The created CoFe2O4 nanostructure have demonstrated ferromagnetic behavior for all the samples behavior which was found in VSM results examination.

High Voltage Asymmetric Supercapacitors Using Tungsten‐Doped Mn‐Co Spinel Ferrite Electrodes

AbstractPhysicochemical properties emerging nanomaterials possessing tungsten (W) are unique and the applications could be extended over a wide spectrum as nanocomposite electrodes for effective high voltage energy storage applications. Herewith, W doped spinel ferrite nanostructures was synthesized with facile hydrothermal strategy to get MnCo1.98W0.02O4 (MnCoW). The spectroscopic characterization studies proved spherical subunits embedded onto nanosheets formed by W doped bimetallic oxide with a crystalline phase. The resistance due to charge transfer of the electrodes was reduced which led to enhanced transfer of charge across interface of electrode and electrolyte was addressed upon W doping. Carbon based nanocomposite electrodes endowed by their unique structures and the electrochemical performance with various aqueous electrolytes were tested in an asymmetric supercapacitor application. Excellent capacitance development from 141.2 F g−1 to 203.7 F g−1 was achieved by W doping possessing an energy density of 17.9 Wh kg−1. A superior capacitance retention of 91 % was obtained from MnCoW‐based device right after 10000 cycles (charging/discharging) at 1 A g−1. The designed supercapacitor device employing MnCoW electrode exhibited better lifetime performance during lighting a LED under various angles.

Mechanistic insight and first principle analysis of cation-inverted zinc ferrite nanostructure: A paradigm for ppb-level room temperature NOx sensor

Herein, we adopted a new paradigm for developing a high-performance gas sensor by leveraging the mixed spinel ZnFe2O4 structure (mZFO) to enhance the adsorption of NOx molecules. Material characterization reveals the formation of the mZFO due to the cation inversion in lattice sites. The estimated value of the inversion degree is observed to shift from 0.78 to 0.39 with an increase in the calcination temperature. The mZFO nanoparticles calcined at 500 °C show exceptional sensing performance due to their suitable grain size (∼2 times Debye length), neck diameter, and surface area. The sensing studies conducted at various NOx concentrations indicate that the sensor can detect ppb level of NOx with a detection limit of about 9 ppb at room temperature. The detailed sensing mechanism is elucidated based on the density functional theory calculations (DFT) and Bader charge analysis. The outstanding sensor performance is attributed to the formation of a mixed spinel structure, wherein the adsorption energy of NOx (∼-0.6 eV) in the presence of surface adsorbed oxygen is higher than that of the normal spinel structure (∼-0.1 eV). Furthermore, the sensor exhibited a fast response and recovery times (7 and 92 s at 800 ppb NO2), excellent stability, and selectivity. The practical suitability of the mZFO sensor was studied by analyzing the vehicle exhaust emissions. We strongly believe this work would pave a novel approach to developing a high-potential gas sensor by modifying the cation distributions in the spinel ferrites.

Temperature-controlled morphology and enhanced functionalities of hydrothermally synthesized SrFe2O4 nanostructures for multifaceted applications

In this study, we investigate the effect of synthesis temperature on the morphology and properties of spinel strontium ferrite (SrFe2O4) nanostructures, synthesized using a surfactant-free hydrothermal method. We demonstrate that by varying the temperature from 85 °C to 160 °C, we can control the morphology of SrFe2O4, transitioning from nanoribbons to dendritic structures, and finally to hexagonal nanoplatelets. These morphological changes correspond to significant enhancements in both magnetic and photocatalytic performance. The saturation magnetization (Ms) notably increases by up to 70 % at higher synthesis temperatures. Additionally, these nanostructures show improved efficiency in photocatalytic degradation of methylene blue dye, indicating their potential for environmental remediation. The dielectric properties of the various morphologies were also characterized, suggesting applications in electronics and energy storage. This study establishes a clear link between synthesis conditions, resulting structures, and functional performance in SrFe2O4 nanostructures, contributing to the development of advanced materials.

Low temperature glycine nitrate combustion synthesis of nanostructured zinc ferrites for enhanced visible light-driven methylene blue degradation

Low temperature glycine nitrate combustion synthesis of nanostructured zinc ferrites for enhanced visible light-driven methylene blue degradation

Exploring morphological variation in bismuth ferrite nanostructures by pulsed laser deposition: synthesis, structural and electrochemical properties.

Structural and electrochemical properties of bismuth ferrite nanostructures produced by pulsed laser deposition with various morphologies are reported. The nanostructures are also explored as electrode materials for high-performance supercapacitors. Scanning electron microscopy images revealed that various bismuth ferrite morphologies were produced by varying the background pressure (10-6, 0.01, 0.10, 0.25, 0.50, 1.0, 2.0 and 4.0 Torr) in the deposition chamber and submitting them to a thermal treatment after deposition at 500◦C. The as-deposited bismuth ferrite nanostructures range from very compact thin-film (10-6, 0.01, 0.10 Torr), to clustered nanoparticles (0.25, 0.50, 1.0 Torr), to very dispersed arrangement of nanoparticles (2.0 and 4.0 Torr). The electrochemical characteristic of the electrodes was investigated through cyclic voltammetry process. The increase in the specific surface area of the nanostructures as background pressure in the chamber increases does not lead to an increase in interfacial capacitance. This is likely due to the wakening of electrical contact between nanoparticles with increasing porosity of the nanostructures. The thermal treatment increased the contact between nanoparticles, which caused an increase in the interfacial capacitance of the nanostructure deposited under high background pressure in the chamber.