Abstract:Crystallite size is one of the fundamental factors controlling the magnetic property of magnetic nanoparticles. In this study, magnetite nanoparticles were produced from Ethiopian iron ore and the effect of solvent extraction parameters on the crystallite size were investigated by considering classical nucleation theory. First, the iron ore was crushed and unwanted gangues were discarded, then followed by further grinding to get a black powder. Finally, the magnetite nanoparticles were produced using solvent e… Show more
“…The technique of thermal decomposition is an endothermic procedure involving a chemical reaction. The chemical production of nanoparticles occurs when chemical bonds, or van der Waal forces, are disrupted by a hot reaction [ 149 ]. This heat of reaction is the temperature at which the chemical elements decompose.…”
Section: Synthesized Iron Oxide Nanoparticles’ Mechanical Alloying Me...mentioning
confidence: 99%
“… Copyright: 2009, 2011, 2020 American Chemical Society; 2012, 2015, 2018 Elsevier Fig. 6 SEM micrographs of IONPs at 60 min a α -Fe 2 O 3 , mechanochemical process [ 147 ] b α-Fe 2 O 3, mechanical milling [ 151 ] c CoFe 2 O 4 , mechanical milling [ 156 ] d Fe 3 O 4 , co-precipitation [ 149 ] e Fe 3 O 4 , sol–gel method [ 158 ] f Fe 3 O 4 , chemical co-precipitation [ 159 ]. Copyright: 2008 American Chemical Society; 2009, 2011 Springer Science; 2012 Trans Tech; 2016, 2021 Elsevier …”
Section: Synthesized Iron Oxide Nanoparticles’ Mechanical Alloying Me...mentioning
confidence: 99%
“… SEM micrographs of IONPs at 60 min a α -Fe 2 O 3 , mechanochemical process [ 147 ] b α-Fe 2 O 3, mechanical milling [ 151 ] c CoFe 2 O 4 , mechanical milling [ 156 ] d Fe 3 O 4 , co-precipitation [ 149 ] e Fe 3 O 4 , sol–gel method [ 158 ] f Fe 3 O 4 , chemical co-precipitation [ 159 ]. …”
Section: Synthesized Iron Oxide Nanoparticles’ Mechanical Alloying Me...mentioning
confidence: 99%
“…Nanomaterials are substances that exhibit the characteristics of microscopic objects. Optics [ 3 , 4 ], mechanics [ 5 , 6 ], bioengineering [ 6 , 7 ], medicine [ 8 , 9 ], and environmental remediation [ 10 , 11 ] are all engineering disciplines that utilize these particles. According to the literature [ 9 – 11 ], numerous strategies have been employed to produce metallic nanoparticles (MNPs).…”
The significance of green synthesized nanomaterials with a uniform shape, reduced sizes, superior mechanical capabilities, phase microstructure, magnetic behavior, and superior performance cannot be overemphasized. Iron oxide nanoparticles (IONPs) are found within the size range of 1–100 nm in nanomaterials and have a diverse range of applications in fields such as biomedicine, wastewater purification, and environmental remediation. Nevertheless, the understanding of their fundamental material composition, chemical reactions, toxicological properties, and research methodologies is constrained and extensively elucidated during their practical implementation. The importance of producing IONPs using advanced nanofabrication techniques that exhibit strong potential for disease therapy, microbial pathogen control, and elimination of cancer cells is underscored by the adoption of the green synthesis approach. These IONPs can serve as viable alternatives for soil remediation and the elimination of environmental contaminants. Therefore, this paper presents a comprehensive analysis of the research conducted on different types of IONPs and IONP composite-based materials. It examines the synthesis methods and characterization techniques employed in these studies and also addresses the obstacles encountered in prior investigations with comparable objectives. A green engineering strategy was proposed for the synthesis, characterization, and application of IONPs and their composites with reduced environmental impact. Additionally, the influence of their phase structure, magnetic properties, biocompatibility, toxicity, milling time, nanoparticle size, and shape was also discussed. The study proposes the use of biological and physicochemical methods as a more viable alternative nanofabrication strategy that can mitigate the limitations imposed by the conventional methods of IONP synthesis.
“…The technique of thermal decomposition is an endothermic procedure involving a chemical reaction. The chemical production of nanoparticles occurs when chemical bonds, or van der Waal forces, are disrupted by a hot reaction [ 149 ]. This heat of reaction is the temperature at which the chemical elements decompose.…”
Section: Synthesized Iron Oxide Nanoparticles’ Mechanical Alloying Me...mentioning
confidence: 99%
“… Copyright: 2009, 2011, 2020 American Chemical Society; 2012, 2015, 2018 Elsevier Fig. 6 SEM micrographs of IONPs at 60 min a α -Fe 2 O 3 , mechanochemical process [ 147 ] b α-Fe 2 O 3, mechanical milling [ 151 ] c CoFe 2 O 4 , mechanical milling [ 156 ] d Fe 3 O 4 , co-precipitation [ 149 ] e Fe 3 O 4 , sol–gel method [ 158 ] f Fe 3 O 4 , chemical co-precipitation [ 159 ]. Copyright: 2008 American Chemical Society; 2009, 2011 Springer Science; 2012 Trans Tech; 2016, 2021 Elsevier …”
Section: Synthesized Iron Oxide Nanoparticles’ Mechanical Alloying Me...mentioning
confidence: 99%
“… SEM micrographs of IONPs at 60 min a α -Fe 2 O 3 , mechanochemical process [ 147 ] b α-Fe 2 O 3, mechanical milling [ 151 ] c CoFe 2 O 4 , mechanical milling [ 156 ] d Fe 3 O 4 , co-precipitation [ 149 ] e Fe 3 O 4 , sol–gel method [ 158 ] f Fe 3 O 4 , chemical co-precipitation [ 159 ]. …”
Section: Synthesized Iron Oxide Nanoparticles’ Mechanical Alloying Me...mentioning
confidence: 99%
“…Nanomaterials are substances that exhibit the characteristics of microscopic objects. Optics [ 3 , 4 ], mechanics [ 5 , 6 ], bioengineering [ 6 , 7 ], medicine [ 8 , 9 ], and environmental remediation [ 10 , 11 ] are all engineering disciplines that utilize these particles. According to the literature [ 9 – 11 ], numerous strategies have been employed to produce metallic nanoparticles (MNPs).…”
The significance of green synthesized nanomaterials with a uniform shape, reduced sizes, superior mechanical capabilities, phase microstructure, magnetic behavior, and superior performance cannot be overemphasized. Iron oxide nanoparticles (IONPs) are found within the size range of 1–100 nm in nanomaterials and have a diverse range of applications in fields such as biomedicine, wastewater purification, and environmental remediation. Nevertheless, the understanding of their fundamental material composition, chemical reactions, toxicological properties, and research methodologies is constrained and extensively elucidated during their practical implementation. The importance of producing IONPs using advanced nanofabrication techniques that exhibit strong potential for disease therapy, microbial pathogen control, and elimination of cancer cells is underscored by the adoption of the green synthesis approach. These IONPs can serve as viable alternatives for soil remediation and the elimination of environmental contaminants. Therefore, this paper presents a comprehensive analysis of the research conducted on different types of IONPs and IONP composite-based materials. It examines the synthesis methods and characterization techniques employed in these studies and also addresses the obstacles encountered in prior investigations with comparable objectives. A green engineering strategy was proposed for the synthesis, characterization, and application of IONPs and their composites with reduced environmental impact. Additionally, the influence of their phase structure, magnetic properties, biocompatibility, toxicity, milling time, nanoparticle size, and shape was also discussed. The study proposes the use of biological and physicochemical methods as a more viable alternative nanofabrication strategy that can mitigate the limitations imposed by the conventional methods of IONP synthesis.
Iron oxide nanoparticles, especially hematite (α-Fe2O3) and magnetite (Fe3O4) have attained substantial research interest in various applications of green and sustainable energy harnessing owing to their exceptional opto-magneto-electrical characteristics and non-toxicity. In this study, we synthesized high-purity hematite and magnetite nanoparticles from a facile top-down approach by employing a high-energy ball mill followed by ultrasonication. A systematic investigation was then carried out to explore the structural, morphological, thermal, optoelectrical, and magnetic properties of the synthesized samples. The experimental results from scanning electron microscopy and X-ray diffraction corroborated the formation of highly crystalline hematite and magnetite nanoparticles with average sizes of ~80 nm and ~50 nm, respectively. Thermogravimetric analysis revealed remarkable results on the thermal stability of the newly synthesized samples. The optical studies confirmed the formation of a single-phase compound with the bandgaps dependent on the size of the nanoparticles. The electrochemical studies that utilized cyclic voltammetry and electrochemical impedance spectroscopy techniques verified these iron oxide nanoparticles as electroactive species which can enhance the charge transfer process with high mobility. The hysteresis curves of the samples revealed the paramagnetic behavior of the samples with high values of coercivity. Thus, these optimized materials can be recommended for use in future optoelectronic devices and can prove to be potential candidates in the advanced research of new optoelectronic materials for improved energy devices.
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