Iron oxide nanoparticle powders with high surface area

2012 ◽  
Author(s):  
M. Křížek ◽  
J. Pechoušek ◽  
J. Tuček ◽  
K. Šafářová ◽  
I. Medřík ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Iron Oxide Nanoparticle ◽  
Oxide Nanoparticle

scholarly journals Magnetic Iron Oxide Nanoparticle (IONP) Synthesis to Applications: Present and Future

Materials ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 4644
Author(s):  
Nene Ajinkya ◽  
Xuefeng Yu ◽  
Poonam Kaithal ◽  
Hongrong Luo ◽  
Prakash Somani ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Surface Area ◽  
Rapid Screening ◽  
Iron Oxide Nanoparticle ◽  
Formation Mechanisms ◽  
Synthesis Methods ◽  
Controlled Synthesis ◽  
Diverse Range ◽  
Oxide Nanoparticle ◽  
And Control

Iron oxides are chemical compounds which have different polymorphic forms, including γ-Fe2O3 (maghemite), Fe3O4 (magnetite), and FeO (wustite). Among them, the most studied are γ-Fe2O3 and Fe3O4, as they possess extraordinary properties at the nanoscale (such as super paramagnetism, high specific surface area, biocompatible etc.), because at this size scale, the quantum effects affect matter behavior and optical, electrical and magnetic properties. Therefore, in the nanoscale, these materials become ideal for surface functionalization and modification in various applications such as separation techniques, magnetic sorting (cells and other biomolecules etc.), drug delivery, cancer hyperthermia, sensing etc., and also for increased surface area-to-volume ratio, which allows for excellent dispersibility in the solution form. The current methods used are partially and passively mixed reactants, and, thus, every reaction has a different proportion of all factors which causes further difficulties in reproducibility. Direct active and complete mixing and automated approaches could be solutions to this size- and shape-controlled synthesis, playing a key role in its exploitation for scientific or technological purposes. An ideal synthesis method should be able to allow reliable adjustment of parameters and control over the following: fluctuation in temperature; pH, stirring rate; particle distribution; size control; concentration; and control over nanoparticle shape and composition i.e., crystallinity, purity, and rapid screening. Iron oxide nanoparticle (IONP)-based available clinical applications are RNA/DNA extraction and detection of infectious bacteria and viruses. Such technologies are important at POC (point of care) diagnosis. IONPs can play a key role in these perspectives. Although there are various methods for synthesis of IONPs, one of the most crucial goals is to control size and properties with high reproducibility to accomplish successful applications. Using multiple characterization techniques to identify and confirm the oxide phase of iron can provide better characterization capability. It is very important to understand the in-depth IONP formation mechanism, enabling better control over parameters and overall reaction and, by extension, properties of IONPs. This work provides an in-depth overview of different properties, synthesis methods, and mechanisms of iron oxide nanoparticles (IONPs) formation, and the diverse range of their applications. Different characterization factors and strategies to confirm phase purity in the IONP synthesis field are reviewed. First, properties of IONPs and various synthesis routes with their merits and demerits are described. We also describe different synthesis strategies and formation mechanisms for IONPs such as for: wustite (FeO), hematite (α-Fe2O3), maghemite (ɤ-Fe2O3) and magnetite (Fe3O4). We also describe characterization of these nanoparticles and various applications in detail. In conclusion, we present a detailed overview on the properties, size-controlled synthesis, formation mechanisms and applications of IONPs.

Rapid preparation of high surface area iron oxide and alumina nanoclusters through a soft templating approach of sol–gel precursors

2013 ◽  
Vol 37 (1) ◽  
pp. 245-249 ◽  
Author(s):  
Fernando Hung-Low ◽  
Geneva R. Peterson ◽  
Marauo Davis ◽  
Louisa J. Hope-Weeks
Keyword(s):  
Iron Oxide ◽  
Surface Area ◽  
High Surface ◽  
Sol Gel ◽  
High Surface Area ◽  
Rapid Preparation ◽  
Soft Templating

High surface area solids obtained by intercalation of iron oxide pillars in montmorillonite

1984 ◽  
Vol 19 (2) ◽  
pp. 161-168 ◽  
Author(s):  
Shoji Yamanaka ◽  
Tadahiro DOI ◽  
Shuji Sako ◽  
Makoto Hattori
Keyword(s):  
Iron Oxide ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area

Synergic Adsorption of H2S Using High Surface Area Iron Oxide–Carbon Composites at Room Temperature

2019 ◽  
Vol 33 (8) ◽  
pp. 7509-7521 ◽  
Author(s):  
Kexin Ling ◽  
Varun Shenoy Gangoli ◽  
Andrew R. Barron
Keyword(s):  
Iron Oxide ◽  
Surface Area ◽  
Room Temperature ◽  
High Surface ◽  
High Surface Area ◽  
Carbon Composites

Soft-templating approach for the synthesis of high surface area and superparamagnetic mesoporous iron oxide materials

2010 ◽  
Vol 131 (1-3) ◽  
pp. 373-377 ◽  
Author(s):  
Atanu Mitra ◽  
Carlos Vázquez-Vázquez ◽  
M. Arturo López-Quintela ◽  
Bidyut K. Paul ◽  
Asim Bhaumik
Keyword(s):  
Iron Oxide ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Oxide Materials ◽  
Soft Templating

scholarly journals Efficiency Enhancement of Electro-Adsorption Desalination Using Iron Oxide Nanoparticle-Incorporated Activated Carbon Nanocomposite

Micromachines ◽  
2021 ◽  
Vol 12 (10) ◽  
pp. 1148
Author(s):  
Ahmed S. Yasin ◽  
Ahmed Yousef Mohamed ◽  
Donghyun Kim ◽  
Sungmin Yoon ◽  
Howon Ra ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Iron Oxide ◽  
Electrode Materials ◽  
High Surface ◽  
Hydrothermal Process ◽  
Water Desalination ◽  
Iron Oxide Nanoparticle ◽  
Potential Candidate ◽  
Structural Morphology ◽  
Oxide Nanoparticle

Capacitive deionization (CDI) technology is currently considered a potential candidate for brackish water desalination. In this study, we designed iron oxide nanoparticle-incorporated activated carbon (AC/Fe2O3) via a facile and cost-effective hydrothermal process. The as-synthesized material was characterized using several techniques and tested as electrodes in CDI applications. We found that the distinctive properties of the AC/Fe2O3 electrode, i.e., high wettability, high surface area, unique structural morphology, and high conductivity, resulted in promising CDI performance. The electrosorptive capacity of the AC/Fe2O3 nanocomposite reached 6.76 mg g−1 in the CDI process, with a high specific capacitance of 1157.5 F g−1 at 10 mV s−1 in a 1 M NaCl electrolyte. This study confirms the potential use of AC/Fe2O3 nanocomposites as viable electrode materials in CDI and other electrochemical applications.

scholarly journals Understanding Pore Surface Modification of Sucrose-Modified Iron Oxide/Silica Mesoporous Composite for Degradation of Methylene Blue

2021 ◽  
Vol 16 (3) ◽  
pp. 459-471
Author(s):  
Yuvita Eka Pertiwi ◽  
Maria Ulfa ◽  
Teguh Endah Saraswati ◽  
Didik Prasetyoko ◽  
Wega Trisunaryanti
Keyword(s):  
Methylene Blue ◽  
Iron Oxide ◽  
Surface Area ◽  
Heterogeneous Reaction ◽  
High Surface ◽  
High Surface Area ◽  
Impregnation Method ◽  
X Ray ◽  
Vis Spectroscopy ◽  
Wide Range

Santa Barbara Amorphous (SBA-15) containing iron oxide with a sucrose-modified in a heterogeneous reaction for degradation methylene blue (MB) successful synthesized used hydrothermal, ultrasonication, and wet impregnation method. SBA-15 is mesoporous silica that can easily serve as external and internal surfaces making it suitable for a wide range of applications. The structure and morphology of materials were characterized using Surface Area Analyzer (SAA), X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscope-Energy Dispersive X-Ray (SEM-EDX), and Transmission Electron Microscopy (TEM). Iron oxide impregnated as a maghemite phase has an average size of 12 nm and well distributed on the SBA-15. After modified with sucrose the materials remaining stable, which has a two-dimensional hexagonal (p6mm) structure, high specific surface area, and large pore volume (up to 1.82 cm3.g−1). The degradation of MB was evaluated under visible light irradiation using UV-Vis spectroscopy. Catalytic activity showed efficiencies of 52.9; 70.2; and 21.1% for SBA-15, Fe2O3/SBA-15, and sucrose-modified Fe2O3/SBA-15 respectively. Sucrose-modified Fe2O3/SBA-15 has the lowest efficiency, which probably occurs due to the presence of pore-blocking and the formation of micropores on the external pore. The modification with sucrose has the advantage of producing a high surface area even though there is a catalytic center due to partial decomposition which causes a decrease in the efficiency of degradation of MB. All materials provide a high micro surface area so that they can be further adapted and can be widely applied to many potential applications as both catalyst support and an adsorbent. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). 

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