Editorial Material
Nanoscience & Nanotechnology
Pranaba K. Nayak
Summary: The analysis of the Mossbauer spectroscopy in the recent paper is flawed, as the authors did not properly analyze the room temperature spectra of the samples. Corrections are necessary for Figure 4, Tables S3 and S4, and the main text.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Inorganic & Nuclear
M. Ounacer, B. Rabi, E. Agouriane, A. Essoumhi, M. Sajieddine, B. F. O. Costa
Summary: This work investigates the coprecipitated magnetite and mixed ferrites of nickel-copper and nickel-zinc. Annealing at high temperature improves the crystallinity of the samples, with magnetite showing a polycrystalline spinel structure and the ferrites displaying a cubic spinel structure. The thermal treatment also causes the oxidation of magnetite into hematite. Morphological observations show that the shape of magnetite nanoparticles is nearly spherical, while the ferrite particles have irregular shapes and tend to aggregate. Magnetic curves reveal different behaviors for the ferrites, with the nickel-copper ferrites exhibiting a blocking temperature close to room temperature and the nickel-zinc ferrites having the lowest blocking temperature. The NZF sample also exhibits a higher M-s value and a narrow hysteresis loop, making it suitable for hyperthermia applications. Mossbauer studies provide insights into the superparamagnetic relaxation and the presence of Fe3+ in the ferrites.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
A. Omelyanchik, A. S. Kamzin, A. A. Valiullin, V. G. Semenov, S. N. Vereshchagin, M. Volochaev, A. Dubrovskiy, T. Sviridova, I Kozenkov, E. Dolan, D. Peddis, A. Sokolov, V Rodionova
Summary: Iron oxide magnetic nanoparticles (MNPs) have gained interest in biomedicine and research due to their moderate cytotoxicity and advanced properties. This study presents a modified one-step coprecipitation method using glycine, which allows the production of MNPs with controlled size and in situ surface decoration. The results show that increasing the glycine concentration reduces the particle size and affects the magnetic properties. This environmentally friendly and cost-effective approach has potential applications in biomedicine and wastewater treatment.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Editorial Material
Chemistry, Physical
Pranaba K. Nayak
Summary: This paper discusses the application of Mossbauer spectroscopy in identifying iron-containing components in Upper Silesian topsoil. However, the authors made errors in fitting iron-bearing samples, resulting in inaccurate relative abundance for other phases.
Article
Materials Science, Multidisciplinary
Mbolantenaina Rakotomalala Robinson, Mustapha Abdelmoula, Martine Mallet, Romain Coustel
Summary: This work focuses on the synthesis and physico-chemical characterization of starch functionalized nano magnetites for pollutant sequestration. The presence of starch in the synthesis medium decreases magnetite crystallinity and enhances particle dispersion, resulting in fast-relaxing superparamagnetic particles at room temperature for high starch to iron mass ratios. The role of starch in the growth and stabilization of nano-magnetites is demonstrated.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Steven Rhodes, Warner Cribb, Valentin Taufour, Dwight Patterson, Dereje Seifu, Saeed Kamali, Suman Neupane
Summary: Alumina is an essential ceramic insulator, while carbon nanotubes (CNTs) have intriguing mechanical, thermal, electrical, and magnetic properties. We report the successful synthesis of CNTs/Al2O3 nanocomposites using the CVD process with iron as a catalyst. Experimental results show that the composites contain CNTs with an average diameter of 40 nm distributed homogenously within the alumina matrix, resulting in a dramatic enhancement of ferromagnetic properties.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2022)
Editorial Material
Nanoscience & Nanotechnology
Fernande Grandjean, Gary J. Long
Summary: This paper describes the morphological, compositional, and magnetic properties of three different magnetite/maghemite or Fe3O4/gamma-Fe2O3 hollow nanoparticles. The nanoparticles have larger sizes than typical nanoparticles and are found to be close in composition to gamma-Fe2O3.
ACS APPLIED NANO MATERIALS
(2022)
Article
Metallurgy & Metallurgical Engineering
Xinran Zhu, Yuexin Han, Yue Cao, Yongsheng Sun, Yanjun Li
Summary: This study characterized the phase transformation and magnetism variation of specularite ore during magnetization roasting using X-ray diffraction, vibrating sample magnetometry, and Mossbauer spectroscopy. It was found that the reduction kinetics of specularite ore followed the nucleation model A(2).
MINERAL PROCESSING AND EXTRACTIVE METALLURGY REVIEW
(2023)
Article
Microbiology
Elizabeth C. Sklute, Deborah A. Leopo, Kaylee A. Neat, Kenneth J. T. Livi, M. Darby Dyar, James F. Holden
Summary: This study investigates the biogenic mineral transformation of thermophilic bacteria Desulfovulcanus ferrireducens on various types of Fe(III) minerals. The results demonstrate that these bacteria can catalyze dissolution-reprecipitation reactions on different Fe(III) minerals, leading to the formation of diverse mineral products.
FRONTIERS IN MICROBIOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Luis A. Rivera-Escobedo, Jorge L. Sanchez-Orozco, Luis A. Garcia-Cerda, Bertha Puente-Urbina, Lorena Garcia-Uriostegui, H. Ivan Melendez-Ortiz
Summary: In this study, thermo-responsive nanocomposites were prepared by synthesizing hafnium-doped magnetite nanoparticles and grafting poly(vinylcaprolactam) (PNVCL) onto them. The nanocomposites were characterized using various techniques, and drug release studies were conducted. The results showed successful incorporation of hafnium into the structure of magnetite, as well as covalent interaction between the nanoparticles and the polymer. The PNVCL-modified Hf0.6Fe2.4O4 nanoparticles exhibited sustained drug release, making them suitable for drug delivery systems.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Geosciences, Multidisciplinary
Ugo Geymond, Theo Briolet, Valentine Combaudon, Olivier Sissmann, Isabelle Martinez, Mathieu Duttine, Isabelle Moretti
Summary: Interactions between water and ferrous rocks can generate natural H-2 through the oxidation of iron. The potential of magnetite (a-Fe3O4) as a source mineral for natural H-2 has never been considered, but recent observations of hydrogen emissions in magnetite-rich banded iron formations (BIF) have prompted further investigation. This study used batch reactor experiments and thermodynamic calculations to explore the reaction pathways of magnetite during water-rock interactions, focusing on low temperatures. The results showed that high amounts of H-2 were generated, accompanied by mineralogical transitions and the formation of secondary minerals. These findings have important implications for H-2 exploration and the understanding of BIF-hosted iron ore formation.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Chemistry, Inorganic & Nuclear
Ahmed M. Abu-Dief, Fedaa M. M. M. Alrashedee, Khadijah A. Emran, Hessah Al-Abdulkarim
Summary: A new series of magnetic MIL-53 MOFs with high porosity and uniformly distributed doping ions were successfully prepared via solvothermal method. These nanomaterials showed potent antimicrobial activity and cytotoxicity against breast cancer cells.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Adam Dziwoki, Bohdana Blyzniuk, Kinga Freindl, Ewa Madej, Ewa Mlynczak, Dorota Wilgocka-Slezak, Jozef Korecki, Nika Spiridis
Summary: Molecular beam epitaxy is enhanced by the presence of an external magnetic field, which impacts the growth morphology and magnetic properties of epitaxial magnetite films on MgO(111). In situ and ex situ characterization techniques revealed that the in-plane magnetic field during deposition influenced the film growth and magnetization process, attributed to modification of the effective magnetic anisotropy. This novel approach expands the capabilities of molecular beam epitaxy for engineering low-dimensional materials.
Article
Chemistry, Multidisciplinary
Monica Sorescu, Jordan Jubeck, Matthew Knauss, Alice Perrin, Michael McHenry
Summary: This study investigated the structural and magnetic properties of cobalt ferrite nanoparticles exposed to mechanochemical activation with and without graphene nanoparticles. It was found that the degree of inversion decreased with milling time and the canting angle was studied as a function of ball milling time for both sets of samples. The hysteresis loops exhibited a wasp-waist shape when recorded at 5 K in an applied magnetic field of 5 T, and the blocking temperature of the samples was determined using zero-field-cooling-field-cooling measurements.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2021)
Article
Chemistry, Multidisciplinary
Lucian Diamandescu, Felicia Tolea, Marcel Feder, Florin Vasiliu, Ionel Mercioniu, Monica Enculescu, Traian Popescu, Bogdan Popescu
Summary: The equimolar oxide mixture beta-Ga2O3-alpha-Fe2O3 was processed by high-energy ball milling to obtain nanoscaled GaFeO3 ortho-ferrite. After 12 hours of HEBM, only nanoscaled gallium-doped alpha-Fe2O3 was obtained, with the GaFeO3 structure being achieved after subsequent calcination.
Article
Chemistry, Analytical
Flavio H. A. de Meira, Sayton F. Resende, Douglas S. Monteiro, Marcio C. Pereira, Luiz H. C. Mattoso, Ronaldo C. Faria, Andre S. Afonso
Article
Green & Sustainable Science & Technology
Edilailsa Januario de Melo, Jose Izaquiel Santos da Silva, Marcio Cesar Pereira, Luiz Carlos Alves de Oliveira, Lucrecio Fabio dos Santos, Jose Domingos Fabris, Jose Roberto Nunhez
Summary: Hematite is a widely used semiconductor in hydrogen production processes, showing favorable performance in both water and ammonia molecular dissociation for hydrogen production. Ammonia-doped hematite as a substrate demonstrated higher electrical current under visible light, while copper-doped hematite showed a more significant increase in electrical current during tests.
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
(2021)
Article
Chemistry, Analytical
Tatiana Santos Andrade, Marcio Cesar Pereira, Panagiotis Lianos
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2020)
Article
Environmental Sciences
Rodrigo C. Hott, Thaina S. Magalhaes, Luiz F. O. Maia, Kallel S. F. Santos, Guilherme L. Rodrigues, Luiz C. A. Oliveira, Marcio C. Pereira, Marcia C. S. Faria, Alessandra P. Carli, Caio C. Souza Alves, Jairo L. Rodrigues
Summary: Environmental contamination is a global concern exacerbated by human activities. In Brazil, mining companies are responsible for polluting large river basins. Fe-2(MoO4)(3) nanoparticles efficiently adsorb arsenic, purifying contaminated water without risks to human health.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Energy & Fuels
Elisa da S. Barreto, Bruno E. L. Baeta, Marcio C. Pereira, Daniel Pasquini, Valeria M. Guimaraes, Leandro V. A. Gurgel
Article
Chemistry, Analytical
Tatiana Santos Andrade, Vassilios Dracopoulos, Marcio Cesar Pereira, Panagiotis Lianos
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2020)
Article
Chemistry, Analytical
Tatiana Santos Andrade, Barbara Antunes Cunha Sa, Izabela Campos Sena, Antero Ricardo Santos Neto, Francisco Guilherme Esteves Nogueira, Panagiotis Lianos, Marcio Cesar Pereira
Summary: The study presents a membrane-free hydrogen peroxide photocatalytic cell with a W-BiVO4/V2O5 photoanode and a Cu2O/CuO photocathode, operating under tandem lighting. The cell achieves a high power density under simulated sunlight.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Analytical
Izabela Campos Sena, Davi de Oliveira Sales, Tatiana Santos Andrade, Mariandry Rodriguez, Adilson Candido da Silva, Francisco Guilherme Esteves Nogueira, Jairo Lisboa Rodrigues, Joao Paulo de Mesquita, Marcio Cesar Pereira
Summary: An all-inorganic PFC with a heterostructured W-BiVO4/V2O5 photoanode and platinum cathode has been developed, utilizing sulfite ions as the anolyte and Fe3+ as the catholyte. Under optimized conditions, the PFC exhibits high short-circuit current, open-circuit potential, and power density, showcasing efficient charge separation and hole transport.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Energy & Fuels
Tatiana Santos Andrade, Vassilios Dracopoulos, Anastasios Keramidas, Marcio Cesar Pereira, Panagiotis Lianos
Summary: A Photo(catalytic) Fuel Cell using CdS/TiO2 photoanode and ethanol as model fuel was studied as a power source for charging a vanadium redox battery. The cell showed stability and power output capacity under various current production conditions. However, self-oxidation of CdS sensitizer was found to occur at a faster rate with high current output, providing insights for sustainable electricity production and storage in a vanadium redox battery.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2021)
Article
Chemistry, Physical
Jose B. G. Filho, Carlos G. O. Bruziquesi, Regiane D. F. Rios, Alexandre A. Castro, Henrique F. V. Victoria, Klaus Krambrock, Alexandra A. P. Mansur, Herman S. Mansur, Ruben D. Siniterra, Teodorico C. Ramalho, Marcio C. Pereira, Luiz C. A. Oliveira
Summary: NbOFe-NF nanofabric was produced using electrospinning technique and applied to the photo degradation of methyl paraoxon, achieving high conversion rate and selectivity.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Physical
Jose B. G. Filho, Regiane D. F. Rios, Carlos G. O. Bruziquesi, Daniele C. Ferreira, Henrique F. V. Victoria, Klaus Krambrock, Marcio C. Pereira, Luiz C. A. Oliveira
Summary: The photocatalytic production of gamma-valerolactone from levulinic acid was achieved using UV-assisted accumulated electron transfer technique. A commercial niobic acid was used as the photocatalyst, showing higher efficiency in ethanol as a hole scavenger and additional contact time with the substrate. By optimizing the reaction conditions, longer illumination time resulted in higher selectivity towards the desired product.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Physical
Wanessa L. Oliveira, Meiriele Antunes Ferreira, Henrique A. J. L. Mourao, Manoel J. M. Pires, Vinicius Ferreira, Honoria F. Gorgulho, Daniel F. Cipriano, Jair C. C. Freitas, Valmor R. Mastelaro, Otaciro R. Nascimento, Dalva E. C. Ferreira, Frederico Ramos Fioravante, Marcio C. Pereira, Joao P. de Mesquita
Summary: This study demonstrates that oxygenated graphitic carbon nitride (g-C3N4) prepared at different temperatures can degrade indigo carmine with hydrogen peroxide in the dark by a reaction similar to a conventional Fenton's reaction. The Fenton-like activity is directly related to the oxygenated functional groups on g-C3N4 structure, mainly -OH functional groups, suggesting a potential alternative to traditional metal catalysts in Fenton-like reactions for advanced oxidation.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Tatiana Santos Andrade, Izabela Campos Sena, Luiz Carlos Alves de Oliveira, Panagiotis Lianos, Marcio Cesar Pereira
Summary: The promising potential of rechargeable Zn-air batteries as energy storage technology is hindered by high charging overpotential. By replacing the battery electrocatalyst with a photoelectrode, more efficient oxidation reactions during charging and reduced bias can be achieved. This novel approach utilizing a BiVO4-based photoelectrode in a zinc-air battery system demonstrates significant reduction in charging voltage and the ability to deliver power with an open-circuit potential of 1.1 V during discharge mode.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Engineering, Environmental
Tatiana S. S. Andrade, Andreia T. T. Oliveira, Mariandry Rodriguez, Marcio C. C. Pereira, Barbara A. C. Sa, Carlos G. O. Bruziquesi, Pedro E. A. Salomao, Franciso G. E. Nogueira, Luiz Carlos Alves de Oliveira
Summary: Efficient light absorption and charge separation and transfer can be achieved in W:BiVO4-WO3-V2O5 ternary heterojunctions, leading to improved performance in the photoelectrochemical water oxidation reaction. The different bandgap energies of W:BiVO4, WO3, and V2O5 enable higher absorption of visible light and enhance charge transport, with V2O5 facilitating hole transport and WO3 increasing electron mobility.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Environmental
Larissa F. Costa, Luis A. M. Ruotolo, Lucas S. Ribeiro, Marcio C. Pereira, Emerson R. Camargo, Francisco G. E. Nogueira
Summary: This study developed a new synthesis route using a modified Pechini approach and soybean husk as a carbon precursor to obtain low-cost magnetic-activated carbons for adsorption of phenolic compounds. The magnetic adsorbents demonstrated a strong affinity towards phenolic compounds and were successful in removing organics from real wastewater. The Fe content, phase formation, and graphitization degree were found to influence both the magnetic properties and adsorption capacity of the materials.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
