Evolution of structural properties of iron oxide nano particles during temperature treatment from 250 °C–900 °C: X-ray diffraction and Fe K-shell pre-edge X-ray absorption study

In this present study, Iron Oxide nano particles were synthesized by using Green method. For this synthesis on Iron oxide, the leaf extract of piper betle was used as a reducing agent and FeCl3 as a precursor. Thus, they were characterized by XRD, SEM,EDX and FTIR. The parity of Fe2O3 nano particles was confirmed by EDX. The crystalline size of Iron Oxide nano particles was analyzed using X-ray Diffraction (XRD) spectrum. The functional groups are identified in Fourier Transform Infrared Spectroscopy (FTIR). The surface morphology of the Iron Oxide Nano particles is found from Scanning Electron Microscopy (SEM). The optical properties are determined by using UV-Visible Spectroscopy. Thus, the so-formed nano particles were Fe2O3.

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Green Biosynthesis of Iron Oxide Nanoparticles and Testing Their Inhibitory Efficacy Against Some Pathogens

Asian Journal of Water Environment and Pollution ◽

10.3233/ajw210051 ◽

2021 ◽

Vol 18 (4) ◽

pp. 119-123

Author(s):

Doaa Kaduim ◽

Zaid Mahmoud ◽

Falah Mousa

Keyword(s):

Iron Oxide ◽

Beta Vulgaris ◽

Inhibition Zone ◽

Nano Particles ◽

X Ray Diffraction ◽

X Ray ◽

E Coli ◽

Size Of Particles ◽

Xrd Patterns ◽

Antibacterial And Antifungal

The biosynthesis of iron oxide (Fe2O3, also known as haematite) nano particles (NPs) using Hydra helix and Beta vulgaris aqueous extracts were adduced, respectively, where the extracts act as a stabiliser and reductant reagent. The crystal structure and size of particles were investigated using X-ray diffraction (XRD), while the morphology was examined using field emission scanning electron microscopy (FESEM), XRD patterns showed the synthesised nanoparticles with well-crystallised structure from Beta vulgaris extract with size 12 nm, while the results by using Hydra helix showed many peaks back to Goethite phase with 16 nm. The antibacterial and antifungal activity were examined using Staphylococcus (showed inhibition zone diameter 23 mm, 16 mm using Hydra helix and Beta vulgaris, respectively), E. coli (showed no inhibition) and Candida fungi (showed inhibition zone 16 mm, 11 mm using Hydra helix and Beta vulgaris, respectively).

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X-ray absorption study at the Fe K-edge of garnets from the Ivrea-Verbano zone

Mineralogical Magazine ◽

10.1180/minmag.1993.057.387.07 ◽

1993 ◽

Vol 57 (387) ◽

pp. 249-255 ◽

Cited By ~ 9

Author(s):

Simona Quartieri ◽

Gianni Antonioli ◽

Pier Paolo Lottici ◽

Gilberto Artioli

Keyword(s):

Absorption Study ◽

X Ray Diffraction ◽

Neighbour Distance ◽

X Ray ◽

Coordination Numbers ◽

Exafs Analysis ◽

Diffraction Structure ◽

Dodecahedral Site ◽

X Ray Absorption ◽

Xanes Analysis

AbstractK-edge X-ray absorption spectra of Fe in garnet samples from the Ivrea-Verbano zone were collected using synchrotron radiation. From XANES analysis, the prevalent oxidation state of Fe has been determined as 2+ in all studied samples. Coordination numbers and Fe-O bond lengths derived from the EXAFS analysis are compatible with a dodecahedral environment of Fe atoms and seem to be nearly independent of the variable Fe/Ca ratio of the cations sharing the dodecahedral site in these garnets. This suggests that, since at least up to 0.5 Ca atoms p.f.u, no sensible deformation of the dodecahedron geometry is sensed by the Fe cations, iron might strongly compete with Ca atoms in controlling the entry of rare earth elements in the dodecahedral site of garnets falling within this compositional range. Comparison of the EXAFS results with the data from single crystal X-ray diffraction structure refinements indicates a first shell neighbour distance accuracy of ±0.02 Å, using theoretical EXAFS phases and amplitudes. The Debye-Waller factors derived from the EXAFS analysis indicate a higher degree of disorder on the four longer Fe-O bond distances, in comparsion with the other four shorter distances of the height-coordinated cation; this could be related to the nonrigid polyhedral behaviour of the dodecahedral site.

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Sensitivity of Zn1-xCdx Te to Tera-Hertz Signals Enhanced by Structural Orderings

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.111.25 ◽

2006 ◽

Vol 111 ◽

pp. 25-30 ◽

Cited By ~ 1

Author(s):

S.W. Han ◽

S.H. Kang

Keyword(s):

Fine Structure ◽

Data Analysis ◽

High Resolution ◽

Structural Properties ◽

Rietveld Refinement ◽

Crystalline Structure ◽

X Ray Diffraction ◽

X Ray ◽

Bridgeman Method ◽

X Ray Absorption

A better efficiency of sensing tera-hertz signals (T-rays) depends on a better crystalline structure which is obtained by replacing a small amount of Cd on Zn sites of ZnTe crystals. Zn1-xCdxTe (ZCT) crystals were fabricated with an advanced vertical Bridgeman method and the structural properties of the ZCT crystals were studied with high resolution x-ray diffraction (HRXRD) and x-ray absorption fine structure (XAFS) measurements. The Rietveld refinement to the HRXRD data showed that the ZCT crystals at x ~ 0.05 were slightly less disordered than the ZnTe crystals. These results were confirmed by the XAFS data analysis. The better structural orderings can be directly related to the sensing and emitting efficiencies of T-ray by the ZCT crystals.

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Correlation between the green-like coloration and the structural and electronic properties of celadon glazes (I)

Cerâmica ◽

10.1590/s0366-69132012000300008 ◽

2012 ◽

Vol 58 (347) ◽

pp. 328-337 ◽

Cited By ~ 2

Author(s):

M. Hidaka ◽

K. Takeuchi ◽

R. P. Wijesundera ◽

L. S. R. Kumara ◽

M. Watanabe ◽

...

Keyword(s):

High Temperature ◽

Thermal Treatment ◽

Fluorescence Analysis ◽

Temperature Treatment ◽

High Temperature Treatment ◽

X Ray Diffraction ◽

X Ray ◽

Structural And Electronic Properties ◽

X Ray Absorption ◽

Fe Ions

Celadon glazes have been investigated by means of ordinary X-ray fluorescence analysis, and X-ray diffraction and X-ray absorption spectra using synchrotron radiation. The tentative glazes are prepared by mixing raw celadon materials of Masuda feldspar, limestone, quartz, and extra-added Fe2O3 of about 1wt% at thermal treatment till about 1300 °C. It is found that the glaze-colors strongly depend on the Fe2O3 amount and the high-temperature treatment under oxidizing and deoxidizing in the used kiln. Especially, the characteristic color of blue-green, white-green-brown, and white-blue-green result from complex hybridized 3d5L and 3d6L bands. The 3d6L hybridization is induced by an electronic exchange interaction between an empty 3d6 orbital of Fe ions and an occupied 2p orbital of surrounding O ions in the (SiO2 - Al2O3 - CaO) basic complex ceramics of glass-state under the deoxidizing thermal treatment.

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Superior Sodium Storage Properties in the Anode Material NiCr 2 S 4 for Sodium‐Ion Batteries: An X‐ray Diffraction, Pair Distribution Function, and X‐ray Absorption Study Reveals a Conversion Mechanism via Nickel Extrusion

Advanced Materials ◽

10.1002/adma.202101576 ◽

2021 ◽

pp. 2101576

Author(s):

Felix Hartmann ◽

Martin Etter ◽

Giannantonio Cibin ◽

Lina Liers ◽

Huayna Terraschke ◽

...

Keyword(s):

Distribution Function ◽

Pair Distribution Function ◽

Sodium Ion ◽

Sodium Ion Batteries ◽

Absorption Study ◽

X Ray Diffraction ◽

X Ray ◽

X Ray Absorption ◽

Sodium Storage ◽

Storage Properties

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Morphology and Structural Properties of Undoped and Cobalt Doped Magnetic Iron Oxide Particles for Improving the Environmental Quality

International Journal of Engineering and Advanced Technology - Regular Issue ◽

10.35940/ijeat.f2184.089620 ◽

2020 ◽

Vol 9 (6) ◽

pp. 18-21 ◽

Cited By ~ 1

Keyword(s):

Iron Oxide ◽

Structural Properties ◽

Industrial Applications ◽

X Ray Diffraction ◽

Iron Oxide Particles ◽

Natural Sand ◽

X Ray ◽

Magnetic Iron Oxide ◽

Milling Method ◽

Oxide Particles

Doping of metal ions in magnetic iron oxide particles can improve its performance and lead to its new technological and industrial applications. Magnetic iron oxide particles of undoped and cobalt doped were synthesized from natural sand of Logas District Kuansing Regency by ball milling method. The structural properties and the morphology of the magnetic iron oxide F e2O3 particles were analyzed using X-Ray Diffractometer (XRD) and scanning electron microscope (SEM). The X-ray diffractometric study showed that X-ray diffraction (XRD) peaks shift to slightly higher angles as compared to those of undoped magnetic iron oxide particles. This shift is due to relatively smaller ionic radius of cobalt as compared to those for iron. Moreover, peaks corresponding to cobalt oxide or metal cobalt could not be observed in the diffraction pattern. Some other diffraction peaks from other crystalline forms such as silicon (Si) and titanium (Ti) were observed.

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Effect of Annealing on Structural Properties of Fe3O4 Ferrite Nanoparticles

Advanced Science Letters ◽

10.1166/asl.2018.12190 ◽

2018 ◽

Vol 24 (8) ◽

pp. 5748-5751

Author(s):

Ravita ◽

Amita ◽

Ashok Kumar ◽

Pawan S Rana

Keyword(s):

Particle Size ◽

Electron Microscope ◽

Iron Oxide ◽

Structural Properties ◽

Iron Oxide Nanoparticles ◽

Annealing Treatment ◽

Precipitation Method ◽

Oxide Nanoparticles ◽

X Ray Diffraction ◽

X Ray

Nano-crystalline Fe3O4 particles has been synthesized by chemical co-precipitation method. The synthesized samples were annealed at different temperature 300 °C, 500 °C, 700 °C. The effect of annealing temperature on structural properties of synthesized sample has been studied by various analytical techniques like X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope and Fourier transform infrared spectroscopy (FTIR). The X-ray diffraction patterns confirm the synthesis of single crystalline phase of Fe3O4 nanoparticles. The crystallite size of synthesized iron oxide nanoparticles is about 7 nm. The crystallinity of iron oxide nanoparticles is enhanced by annealing treatment which is also confirmed by corresponding SEM and TEM micrographs. A phase transition from magnetite (Fe3O4) to hematite (α-F2O3) is observed when the samples are annealed above 500 °C. The fundamental groups of the iron oxide and annealed samples have been identified from FTIR spectrum. The particle size calculated from TEM images for the Fe3O4 sample varies in the range 5–20 nm and it has been observed that the particle size increases on annealing.

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X-RAY ABSORPTION STUDY OF FREE AND BOUND SULPHUR IN MoS2+x(0 ≤ x ≤ 1)

Le Journal de Physique Colloques ◽

10.1051/jphyscol:19879190 ◽

1987 ◽

Vol 48 (C9) ◽

pp. C9-1049-C9-1052

Author(s):

P. BELOUGNE ◽

B. DEROIDE ◽

J. M. ESTEVA ◽

R. C. KARNATAK ◽

J. V. ZANCHETTA

Keyword(s):

Absorption Study ◽

X Ray ◽

X Ray Absorption

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