scholarly journals Influence of Anion Coexistence on Crystal Structure of Iron Oxides Deposited from Steel Surfaces

2008 ◽  
Vol 6 ◽  
pp. 60-63
Author(s):  
Kozo Shinoda ◽  
Sang-Koo Kwon ◽  
Shigeru Suzuki ◽  
Yoshio Waseda
Keyword(s):  
Crystal Structure ◽  
Iron Oxides ◽  
Steel Surfaces

scholarly journals Discovery of Fe7O9: a new iron oxide with a complex monoclinic structure

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Ryosuke Sinmyo ◽  
Elena Bykova ◽  
Sergey V. Ovsyannikov ◽  
Catherine McCammon ◽  
Ilya Kupenko ◽  
...  
Keyword(s):  
Applied Sciences ◽  
Crystal Structure ◽  
Iron Oxide ◽  
Iron Oxides ◽  
Industrial Applications ◽  
Ambient Conditions ◽  
X Ray Diffraction ◽  
X Ray ◽  
High Pressure High Temperature ◽  
Insight Into

Abstract Iron oxides are fundamentally important compounds for basic and applied sciences as well as in numerous industrial applications. In this work we report the synthesis and investigation of a new binary iron oxide with the hitherto unknown stoichiometry of Fe7O9. This new oxide was synthesized at high-pressure high-temperature (HP-HT) conditions, and its black single crystals were successfully recovered at ambient conditions. By means of single crystal X-ray diffraction we determined that Fe7O9 adopts a monoclinic C2/m lattice with the most distorted crystal structure among the binary iron oxides known to date. The synthesis of Fe7O9 opens a new portal to exotic iron-rich (M,Fe)7O9 oxides with unusual stoichiometry and distorted crystal structures. Moreover, the crystal structure and phase relations of such new iron oxide groups may provide new insight into the cycling of volatiles in the Earth’s interior.

scholarly journals Bacterial Phosphating of Mild (Unalloyed) Steel

2000 ◽  
Vol 66 (10) ◽  
pp. 4389-4395 ◽  
Author(s):  
Hans-Peter Volkland ◽  
Hauke Harms ◽  
Beat Müller ◽  
Gernot Repphun ◽  
Oskar Wanner ◽  
...  
Keyword(s):  
Oxygen Consumption ◽  
Iron Oxides ◽  
Driving Force ◽  
Steel Surface ◽  
Surface Reaction ◽  
Bacterial Activity ◽  
Initial Value ◽  
Steel Surfaces ◽  
Steel Electrodes ◽  
Unalloyed Steel

ABSTRACT Mild (unalloyed) steel electrodes were incubated in phosphate-buffered cultures of aerobic, biofilm-formingRhodococcus sp. strain C125 and Pseudomonas putida mt2. A resulting surface reaction leading to the formation of a corrosion-inhibiting vivianite layer was accompanied by a characteristic electrochemical potential (E) curve. First, E increased slightly due to the interaction of phosphate with the iron oxides covering the steel surface. Subsequently, E decreased rapidly and after 1 day reached −510 mV, the potential of free iron, indicating the removal of the iron oxides. At this point, only scattered patches of bacteria covered the surface. A surface reaction, in which iron was released and vivianite precipitated, started. E remained at −510 mV for about 2 days, during which the vivianite layer grew steadily. Thereafter, E increased markedly to the initial value, and the release of iron stopped. Changes in E and formation of vivianite were results of bacterial activity, with oxygen consumption by the biofilm being the driving force. These findings indicate that biofilms may protect steel surfaces and might be used as an alternative method to combat corrosion.

Facile crystal-structure-controlled synthesis of iron oxides for adsorbents and anode materials of lithium batteries

2016 ◽  
Vol 170 ◽  
pp. 239-245 ◽  
Author(s):  
Yao Luo ◽  
Lihu Liu ◽  
Wencan Qiao ◽  
Fan Liu ◽  
Yashan Zhang ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Iron Oxides ◽  
Lithium Batteries ◽  
Anode Materials ◽  
Controlled Synthesis

The abiotic reductive removal and subsequent incorporation of Tc(iv) into iron oxides: a frontier review

2019 ◽  
Vol 6 (12) ◽  
pp. 3492-3500 ◽  
Author(s):  
Daria Boglaienko ◽  
Tatiana G. Levitskaia
Keyword(s):  
Crystal Structure ◽  
Iron Oxides ◽  
Exafs Analysis ◽  
Subsequent Incorporation

This article reviews the mechanism of Tc incorporation into the crystal structure of magnetite and provides comparative EXAFS analysis.

Tritium exchange studies on metal oxide colloidal dispersions

1977 ◽  
Vol 30 (8) ◽  
pp. 1655 ◽  
Author(s):  
DE Yates ◽  
F Grieser ◽  
R Cooper ◽  
TW Healy
Keyword(s):  
Crystal Structure ◽  
Heat Treatment ◽  
Iron Oxide ◽  
Metal Oxide ◽  
Iron Oxides ◽  
Colloidal Dispersions ◽  
Water Interface ◽  
Amorphous Iron ◽  
Tio2 Rutile ◽  
Exchange Technique

The tritium exchange technique has been used to detemine the maximum number of surface protons at the oxide-water interface for oxide colloids including silicas, TiO2 (rutile) and the iron oxides goethite, hematite and amorphous iron oxide. The effects of heat treatment, crystal structure and exchange conditions are considered and tritium exchange values for the number of surface protons are compared with values calculated from crystal structures.

One-Pot Synthesis of Iron Oxides-Doped Carbon Microspheres Composites

2018 ◽  
Vol 932 ◽  
pp. 76-80
Author(s):  
Xiao Hui Guo ◽  
Hui Min Yang ◽  
Gui Bao Guo
Keyword(s):  
Crystal Structure ◽  
Iron Oxides ◽  
High Performance ◽  
Dye Wastewater ◽  
Carbon Microspheres ◽  
Concentration Increase ◽  
Sem Images ◽  
One Pot ◽  
Properties Of Materials ◽  
Hydrothermal Methods

Iron oxides-doped carbon microspheres composites were synthesized by one-pot hydrothermal methods using Fe (NO3)3·9H2O as the iron source and glucose as the carbon source. The morphology, particle size and crystal structure can be controlled flexibly by altering the concentration of ferric salts and glucose. The SEM and XRD were used to characterize the physicochemical properties of materials. The SEM images indicated that the composites were microspheres, and as the salts concentration increase, adhesion occurred between microspheres. The XRD results showed that the composites were composed of Fe3O4 and amorphous carbon. The materials were applied to photocatalytic degradation of dye wastewater and possessed high performance.

Synthesis, crystal structure and magnetic properties of iron oxides nanoparticles for biomedical applications

2010 ◽  
Vol 3 (3) ◽  
pp. 220 ◽  
Author(s):  
S. Rashdan ◽  
M. Bououdina ◽  
A. Al Saie ◽  
E. Ghanem ◽  
A. Bin Thani ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Iron Oxides ◽  
Biomedical Applications

Association of Uranium with Iron Oxides Typically Formed on Corroding Steel Surfaces

2002 ◽  
Vol 36 (16) ◽  
pp. 3504-3511 ◽  
Author(s):  
C. J. Dodge ◽  
A. J. Francis ◽  
J. B. Gillow ◽  
G. P. Halada ◽  
C. Eng ◽  
...  
Keyword(s):  
Iron Oxides ◽  
Steel Surfaces
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