Formation Mechanisms of Iron Oxide and Iron Sulfide at High Temperature in Aqueous H2S Corrosion Environment

2018 ◽  
Vol 165 (3) ◽  
pp. C171-C179 ◽  
Author(s):  
Shujun Gao ◽  
Bruce Brown ◽  
David Young ◽  
Srdjan Nesic ◽  
Marc Singer
Keyword(s):  
High Temperature ◽  
Iron Oxide ◽  
Iron Sulfide ◽  
Formation Mechanisms ◽  
H2s Corrosion

Formation of iron oxide and iron sulfide at high temperature and their effects on corrosion

2018 ◽  
Vol 135 ◽  
pp. 167-176 ◽  
Author(s):  
Shujun Gao ◽  
Bruce Brown ◽  
David Young ◽  
Marc Singer
Keyword(s):  
High Temperature ◽  
Iron Oxide ◽  
Iron Sulfide

scholarly journals Magnetic field-assisted assembly of iron oxide mesocrystals: a matter of nanoparticle shape and magnetic anisotropy

2019 ◽  
Vol 10 ◽  
pp. 894-900 ◽  
Author(s):  
Julian J Brunner ◽  
Marina Krumova ◽  
Helmut Cölfen ◽  
Elena V Sturm (née Rosseeva)
Keyword(s):  
Magnetic Field ◽  
Iron Oxide ◽  
Structural Difference ◽  
Superparamagnetic Iron Oxide ◽  
Directed Assembly ◽  
Homogeneous Magnetic Field ◽  
Superparamagnetic Nanoparticles ◽  
Formation Mechanisms ◽  
Nanoparticle Shape ◽  
Self Assembled

This letter describes the formation and detailed characterization of iron oxide mesocrystals produced by the directed assembly of superparamagnetic iron oxide-truncated nanocubes using the slow evaporation of the solvent within an externally applied homogeneous magnetic field. Anisotropic mesocrystals with an elongation along the direction of the magnetic field can be produced. The structure of the directed mesocrystals is compared to self-assembled mesocrystalline films, which are formed without the influence of a magnetic field. The remarkable structural difference of mesocrystals produced within the external magnetic field from those self-assembled without field indicates that the specific nanoparticle ordering within the superstructure is driven by competing of two types of anisotropic interactions caused by particle shape (i.e., faceting) and orientation of the magnetic moment (i.e., easy axes: <111>magnetite). Hence, these findings provide a fundamental understanding of formation mechanisms and structuring of mesocrystals built up from superparamagnetic nanoparticles and how a magnetic field can be used to design anisotropic mesocrystals with different structures.

Synthesis and Comparison of the Magnetic Properties of Iron Sulfide Spinel and Iron Oxide Spinel Nanocrystals

2011 ◽  
Vol 23 (10) ◽  
pp. 2514-2517 ◽  
Author(s):  
John H. L. Beal ◽  
Sujay Prabakar ◽  
Nicola Gaston ◽  
Geok B. Teh ◽  
Pablo G. Etchegoin ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Iron Oxide ◽  
Iron Sulfide ◽  
Oxide Spinel

scholarly journals Thermodynamic evaluation for reduction of iron oxide ore particles in a high temperature drop tube furnace

2018 ◽  
Vol 47 (2) ◽  
pp. 173-177 ◽  
Author(s):  
Zhiyuan Chen ◽  
Yingxia Qu ◽  
Christiaan Zeilstra ◽  
Jan van der Stel ◽  
Jilt Sietsma ◽  
...  
Keyword(s):  
High Temperature ◽  
Iron Oxide ◽  
Temperature Drop ◽  
Tube Furnace ◽  
Thermodynamic Evaluation ◽  
Drop Tube ◽  
Drop Tube Furnace ◽  
Reduction Of Iron

scholarly journals Review and data evaluation for high-temperature reduction of iron oxide particles in suspension

2019 ◽  
Vol 47 (7) ◽  
pp. 741-747 ◽  
Author(s):  
Zhiyuan Chen ◽  
Christiaan Zeilstra ◽  
Jan van der Stel ◽  
Jilt Sietsma ◽  
Yongxiang Yang
Keyword(s):  
High Temperature ◽  
Iron Oxide ◽  
Data Evaluation ◽  
Iron Oxide Particles ◽  
Temperature Reduction ◽  
Reduction Of Iron ◽  
Oxide Particles

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.

Modification effect of high-temperature ball milling condition to iron oxide corrosion protective coating

2017 ◽  
Vol 111 ◽  
pp. 210-219
Author(s):  
Xiaoling Liu ◽  
Yingjun Zhang ◽  
Mingshun Liu ◽  
Xinwei Li ◽  
Yawei Shao ◽  
...  
Keyword(s):  
High Temperature ◽  
Iron Oxide ◽  
Ball Milling ◽  
Protective Coating ◽  
Modification Effect ◽  
Milling Condition
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