Article
Materials Science, Multidisciplinary
H. G. Abd-Elbaky, M. Rasly, Reem G. Deghadi, Gehad G. Mohamed, M. M. Rashad
Summary: In recent years, the eco-friendly strong-base free synthesis has been applied to the synthesis of spinel cobalt ferrites, leading to successful preparation of the ferrites. By adjusting the composition and structure, the magnetic and optical properties of the cobalt ferrites were controlled, providing a feasible approach for magneto-optical applications.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Analytical
Hyung Joon Kim, Sung Wook Hyun, So Hee Kim, Hyunkyung Choi
Summary: Mn-Zn ferrite nanoparticles for magnetic hyperthermia applications were synthesized using a high temperature thermal decomposition method, with a maximum saturation magnetization of 83.2 emu/g. The results suggest that these synthesized nanoparticles have potential applications in the field of magnetic hyperthermia.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2021)
Article
Environmental Sciences
Hua Huang, Wanting Feng, Zhirui Niu, Xiaoqian Qin, Xianfan Liu, Baoqin Shan, Yu Liu
Summary: In this study, magnetically recyclable Mn0.6Zn0.4Fe2O4@Zn0.9Mn0.1O (MZFO@ZMO) heterojunctions were successfully prepared from waste Mn-Zn batteries, exhibiting excellent photocatalytic activity under visible light irradiation. The optimized MZFO@50%-ZMO showed the highest photodegradation efficiency towards methylene blue, with a promising potential for practical application.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Biochemistry & Molecular Biology
Thomas Dippong, Erika Andrea Levei, Oana Cadar
Summary: The structural, morphological and magnetic properties of MFe2O4 (M = Co, Ni, Zn, Cu, Mn) type ferrites were studied. The results showed that different phases of ferrite nanoparticles can be obtained by heat treatment at different temperatures.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Chemistry, Multidisciplinary
Adam Szatmari, Rares Bortnic, Gabriela Souca, Razvan Hirian, Lucian Barbu-Tudoran, Fran Nekvapil, Cristian Iacovita, Emil Burzo, Roxana Dudric, Romulus Tetean
Summary: Co1-xZnxFe2O4 nanoparticles (0 <= x <= 1) were synthesized via a green sol-gel combustion method, and their characteristics were studied using various techniques. The nanoparticles showed high crystallinity and exhibited a cubic Fd-3m structure. The presence of cobalt, zinc, iron, and oxygen in the samples was confirmed through EDS analysis. Raman spectra revealed the preferential location of Zn ions in T sites for low Zn concentrations. The magnetic properties of the nanoparticles were discussed based on the Raman results, showing an increase in magnetization with increasing Zn content for x < 0.5. Co ferrite doped with 30% Zn exhibited the highest SAR values, which increased linearly with H from 20 to 60 kA/m.
Article
Materials Science, Ceramics
K. Anu, J. Hemalatha
Summary: Zn-doped nickel ferrite nanoparticles were successfully synthesized and characterized in terms of their structural, compositional, and morphological properties. These nanoparticles exhibited superparamagnetic behavior, high electrical conductivity, and surface charge, making them promising candidates for applications in thermoelectrics, hyperthermia, magnetic coatings, and conducting ferrofluids.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Thomas Dippong, Erika Andrea Levei, Oana Cadar
Summary: The study investigated the formation, structure, thermal and magnetic properties of MFe2O4@SiO2 (M = Co, Mn, Zn, Ni, Cu) nanocomposites, revealing the evolution of crystalline phases and variation of crystallite sizes of different ferrites at various annealing temperatures, as well as the dependence of magnetic properties on ferrite type, annealing temperature, and particle size. Annealing the nanocomposites at 1200 degrees C resulted in paramagnetic MnFe2O4, CoFe2O4, NiFe2O4, and CuFe2O4, as well as antiferromagnetic ZnFe2O4.
Article
Materials Science, Multidisciplinary
Ala Manohar, V. Vijayakanth, S. V. Prabhakar Vattikuti, Ki Hyeon Kim
Summary: The particle size of spinel ferrite nanoparticles plays a crucial role in determining their properties and behavior in biomedical applications. This review focuses on the role of nanoparticle size in various biomedical applications, including induction heating, photocatalysis, and cytotoxicity. The review also discusses the biocompatibility properties and potential applications of spinel ferrite nanoparticles in medicine and the environment.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Physical
I. El Heda, J. Massoudi, R. Dhahri, E. Dhahri, F. Bahri, K. Khirouni, B. F. O. Costa
Summary: The structure, elastic properties, and optical properties of two ferrite ceramic materials were investigated. It was found that these compounds exhibit good conductivity and ductile nature, making them suitable for the fabrication of electrical and microwave devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Mohamed A. Gabal, Dina F. Katowah, Mahmoud A. Hussein, A. A. Al-Juaid, Ayman Awad, A. M. Abdel-Daiem, Abdu Saeed, Mahmoud M. Hessien, Abdullah M. Asiri
Summary: Nanocrystalline metal ferrites (CoFe2O4, M = Co, Ni, Cu, Mg, and Zn) were successfully synthesized using egg white via autocombustion synthesis. Characterization through XRD, FTIR, and TEM showed different structural properties and magnetic behaviors influenced by the metal ions, with semiconducting characteristics observed. The obtained low dielectric constant values suggest potential high-frequency applications for the synthesized ferrites.
Article
Materials Science, Ceramics
Bowen Sun, Danyue Ma, Guohua Bai, Jixi Lu, Ke Yang, Kai Wang, Xueping Xu, Yueyang Zhai, Wei Quan, Bangcheng Han
Summary: This study evaluated the magnetic noise of Mn-Zn ferrite magnetic shield based on its grain size and established a correlation between grain size and magnetic permeability. The predicted values of the magnetic noise were consistent with the experimental results, suggesting the feasibility of the proposed approach for developing low-noise magnetic shields.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Analytical
Thomas Dippong, Erika-Andrea Levei, Dana Toloman, Lucian Barbu-Tudoran, Oana Cadar
Summary: The structure, morphology, and photocatalytic features of Mn-Zn ferrite nanoparticles embedded in SiO2 matrix synthesized by a modified sol-gel method were investigated. Increasing the manganese content led to larger crystallite size, smaller energy band gap, and improved sonophotocatalytic activity in degrading Rhodamine B under visible light irradiation.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2021)
Article
Materials Science, Ceramics
Hossein Goodarzi, Manoochehr Sobhani
Summary: In this study, Mn0.76Zn0.24Fe2O4 spinel ferrite was fabricated with the addition of CaO. The addition of CaO improved the theoretical density and saturation magnetization of the samples.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Alexandre Harmon, Marilyne Roumanie, Ulrich Soupremanien, Denis Autissier
Summary: This study focuses on the analysis of the optical properties of formulations containing Mn-Zn ferrite powder. Different particle sizes were used to study the influence of the cured monolayer evolution and the optical properties of the ferrite.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Biochemistry & Molecular Biology
Thomas Dippong, Erika Andrea Levei, Iosif Grigore Deac, Ioan Petean, Oana Cadar
Summary: This paper investigates the influence of Mn2+ substitution by Ni2+ on the structural, morphological and magnetic properties of Mn1-xNixFe2O4@SiO2 nanocomposites. The results show that as the Ni content increases, the crystal structure, morphology and magnetic properties of the samples change. The samples annealed at higher temperatures have more crystalline structures, while those annealed at lower temperatures exhibit more loosely packed crystals. Additionally, these parameters are also larger for the samples annealed at higher temperatures.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Review
Materials Science, Multidisciplinary
Rohit Ranga, Ashok Kumar, Parveen Kumari, Permender Singh, Vasundhara Madaan, Krishan Kumar
Summary: Nano-ferrites are extensively researched sensing materials for detecting toxic gases and monitoring environmental pollution, with improved gas sensing performance achieved through various doping and composite materials.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
Suman, Seema Devi, Vikas Sharma, Surjeet Chahal, Pratibha Goel, Saurabh Singh, Ashok Kumar, Parmod Kumar
Summary: Nanostructured iron oxide (Fe2O3) has unique physical properties that are size and shape-dependent. Different nanostructures were grown using hydrothermal & sol-gel methods, with the sol-gel derived gamma-Fe2O3 nanocubes displaying maximum magnetization and superparamagnetic behavior. Nanoflowers showed higher photocatalytic activity for degradation of RB dye under UV light, attributed to defects in the catalyst's nanostructure. Overall, Fe2O3 nanostructures are highly efficient catalysts for environmental pollution cleanup.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2021)
Article
Physics, Condensed Matter
Suman, Vikas Sharma, Seema Devi, Surjeet Chahal, Jitendra Pal Singh, K. H. Chae, Ashok Kumar, K. Asokan, Parmod Kumar
Summary: This study focuses on investigating the physical properties of different phases of Fe2O3 by varying solvents and precursors, showing that different combinations of solvents and precursors can lead to variations in crystallite size and structure. These effects are also reflected in the dielectric loss and permittivity of different phases.
PHYSICA B-CONDENSED MATTER
(2021)
Article
Materials Science, Ceramics
Surjeet Chahal, Lakshita Phor, Saurabh Singh, Amanvir Singh, Jaideep Malik, Pratibha Goel, Ashok Kumar, Suresh Kumar, Ankita, Parmod Kumar
Summary: This study synthesized unique nanorods of cerium oxide and found that they exhibit effective degradation of p-Nitrophenol. The research also discovered the dual functionality of magnesium-doped cerium oxide in spintronics and photocatalysis.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Rohit Ranga, Krishan Kumar, Ashok Kumar
Summary: Lanthanum doped magnesium-zinc spinel ferrite samples were synthesized by the co-precipitation method. The effects of La3+ ion doping on crystallite size and lattice parameter were discussed. The samples showed a crystallite size range of 7-12 nm, percentage porosity range of 49-50%, and percentage crystallinity range of 80-85%. FTIR spectra shift to higher region with La3+ ion doping. EDS analysis confirmed the absence of impurities except carbon. EPR analysis showed a decrease in g-value and a shift in resonance field for the synthesized samples. The synthesized samples exhibited superparamagnetic nature and low coercive field value, making them suitable for ferrofluids and hyperthermia treatment applications.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Rohit Ranga, Krishan Kumar, Ashok Kumar
Summary: This study successfully synthesized Ce3+ ion doped MZP ferrite nanoparticles using co-precipitation process. XRD and FTIR analysis confirmed the single-phase spinel structure of the samples. TEM and FE-SEM observations revealed the porous morphology and spherical shape of the nanoparticles. The doped samples exhibited some special physical properties, such as changes in dielectric value and magnetic characteristics.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Review
Materials Science, Multidisciplinary
Harita Sonia, Harita Kumari, Seema Suman, Surjeet Chahal, Seema Devi, Suresh Kumar, Sandeep Kumar, Parmod Kumar, Ashok Kumar
Summary: This paper comprehensively reviews the research interest in MFe2O4 and its nanocomposites with specific metal oxides (ZnO, TiO2, CeO2) for decontamination of wastewater using photocatalysts. The stable and easily separable magnetic behavior of MFe2O4 nanoparticles make them attractive for this application. The paper discusses the advantageous pathway for the generation of free radicals with the help of MFe2O4-based nanocomposites as photocatalysts.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Chemistry, Inorganic & Nuclear
Vasundhara Madaan, Brij Mohan, Vinita Bhankar, Rohit Ranga, Parveen Kumari, Permender Singh, Mika Sillanpaa, Ashok Kumar, Alexander A. Solovev, Krishan Kumar
Summary: Metal-doped CeO2-based nanomaterials show promising applications in the photocatalytic degradation of organic waste in water. The unique properties of metal-doped CeO2, such as its characteristic bandgap, oxygen vacancies, and surface-active cationic sites, play an important role in organic waste degradation. The synthesis routes and conditions, reaction temperature, concentration, nature and annealing temperature of the doping ions, and surface morphology also affect the photocatalytic degradation process. Challenges and prospects for the development of metal-doped CeO2 as a photocatalyst with precise morphology and synthesis routes are discussed.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Materials Science, Ceramics
Seema Devi, Saurabh Suman, Surjeet Chahal, Saurabh Singh, Sandeep Ankita, Parmod Kumar, Sandeep Kumar, Ashok Kumar, Vinod Kumar
Summary: Hybrid nanocomposite materials consisting of multi walled carbon nanotubes (MWCNT) and hematite (a-Fe2O3) were developed for wastewater treatment through photocatalysis. The nanocomposites were prepared using a sonication method and characterized using various techniques. The 10% a-Fe2O3/CNT nanocomposites exhibited higher photocatalytic activity with 87% degradation of Rose Bengal dye in 90 minutes. The enhanced activity was attributed to the synergistic effects of a-Fe2O3 and CNTs, which reduced charge carrier recombination and promoted the formation of highly active radical species on the CNT surface. This research is significant for understanding the photocatalytic mechanism and developing efficient photocatalysts for organic pollutant degradation.
CERAMICS INTERNATIONAL
(2023)
Review
Environmental Sciences
Harita Kumari, Sonia, Surjeet Suman, Rohit Ranga, Surjeet Chahal, Seema Devi, Sourabh Sharma, Sandeep Kumar, Parmod Kumar, Suresh Kumar, Ashok Kumar, Rajesh Parmar
Summary: Water pollution is a global issue caused by rapid industrialization and urbanization. Metal oxide-based semiconductors have been explored as photocatalysts to degrade organic pollutants in wastewater, but their performance is limited. Strategies such as doping, nanocomposite formation, and core-shell nanostructures have been discussed to improve their photocatalytic activity. Rare-earth doped metal oxides show advantages in interacting with functional groups quickly. This review article focuses on synthesizing rare earth doped metal oxides and nanocomposites, their efficiency in degrading organic pollutants, and potential industrial applications.
WATER AIR AND SOIL POLLUTION
(2023)
Article
Materials Science, Ceramics
Rohit Ranga, Krishan Kumar, Ashok Kumar
Summary: A series of La3+ ion doped magnesium nickel ferrites were prepared and characterized for their structural and magnetic properties. The doping of La3+ ions resulted in a decrease in crystallite size, an increase in lattice parameter, and changes in magnetic properties. Additionally, the frequency and temperature variations affected the dielectric properties of the material.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Electrical & Electronic
Sonia, Ashok Kumar, Parmod Kumar
Summary: Cobalt ferrite/cerium oxide nanocomposites with varying weight ratios were synthesized and investigated for the removal of Rose Bengal dye by photocatalytic activity. The results showed that increasing the content of cerium oxide led to the creation of oxygen vacancies and photoinduced electrons and holes, resulting in enhanced photocatalytic activity.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
Harita Kumari, Surjeet Sonia, Surjeet Chahal, Ashok Suman, Parmod Kumar, Ashok Kumar, Rajesh Parmar
Summary: Scientists and citizens are concerned about the presence of organic pollutants in water bodies, especially phenolic compounds, organic dyes, and antibiotics. This study synthesized Ce-doped SnO2 samples and found that they exhibited a single phase crystalline nature. The incorporation of Ce resulted in improved ferromagnetic properties and enhanced catalytic behavior, making SnO2 a useful material for spintronic devices and the degradation of organic dyes.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Surjeet Ankita, Surjeet Chahal, Saurabh Singh, Ashok Suman, K. Kanishka H. De Silva, Ashok Kumar, Sandeep Kumar, Lalit Kumar, Masamichi Yoshimura, Ravi Kumar, Parmod Kumar
Summary: The present work focuses on refining the magnetic and photocatalytic properties of three samples of cerium oxide nano/micro-sized particles synthesized by different chemical routes. X-ray diffraction measurements reveal the growth of a single phase cubic fluorite structure of pure CeO2 with a space group of Fm3m. The synthesis route significantly alters the morphology and particle size, as observed by high resolution transmission electron microscopy. Raman spectra and XPS confirm the presence of oxygen vacancies defects in the CeO2 matrix. In this study, the magnetic properties and photocatalytic activity of rose Bengal dye under UV light were investigated. Room temperature ferromagnetism was observed for SG, CO, and HB samples, with small magnetizations of 2.21, 16.8, and 3.58 emu/g x 10-4, respectively. The photocatalytic efficiency of the CO sample was 76.3% for the degradation of rose Bengal dye under UV illumination for 140 minutes. Therefore, the morphology-dependent enhanced ferromagnetic and superior photocatalytic behavior of CeO2 make it a multifunctional material for use as a photocatalyst for organic dye decomposition and in spintronics devices.
Article
Environmental Sciences
Surjeet Chahal, Lakshita Phor, Ashok Kumar, Suresh Kumar, Sandeep Kumar, Ravi Kumar, Parmod Kumar
Summary: This article presents the synthesis of cerium oxide (CeO2) nanoparticles using a sol-gel method, followed by their decoration on multi-walled carbon nanotubes (CNTs) and graphene oxide (GO) to create binary and ternary hybrid nanocomposites via ultrasonic treatment. The presence of oxygen vacancy defects enhances the photocatalytic efficiency as observed using X-ray photoelectron spectroscopy (XPS). The ternary hybrid nanocomposites (CeO2/CNT/GO) exhibit excellent photocatalytic efficiency with a degradation rate of rose bengal (RB) dye up to 96.9% in 50 minutes. CNTs and GO facilitate interfacial charge transfer, thereby reducing electron-hole pair recombination. These findings suggest that these composites show great promise for the degradation of harmful organic pollutants in wastewater treatment.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
