Quantitative determination of the oxidation state of iron in biotite using X-ray photoelectron spectroscopy: I. Calibration

1997 ◽  
Vol 61 (21) ◽  
pp. 4519-4530 ◽  
Author(s):  
Stuart P. Raeburn ◽  
Eugene S. Ilton ◽  
David R. Veblen
Keyword(s):  
Quantitative Determination ◽  
Oxidation State ◽  
Photoelectron Spectroscopy ◽  
X Ray

Determination of the oxidation state of manganese in lepidolite by X-ray photoelectron spectroscopy

Clay Minerals ◽  
1982 ◽  
Vol 17 (4) ◽  
pp. 477-481 ◽  
Author(s):  
S. Evans ◽  
E. Raftery
Keyword(s):  
Oxidation State ◽  
Photoelectron Spectroscopy ◽  
Electronic Spectroscopy ◽  
Binding Energies ◽  
Core Electron ◽  
X Ray ◽  
Occasional Occurrence ◽  
The Subject ◽  
Electron Binding Energies

It is usually assumed that the oxidation state of the small proportion of Mn sometimes present in micas is +2, although there is evidence from electronic spectroscopy (Burns, 1970) for at least the occasional occurrence of Mn(III) in manganophyllite. We describe here X-ray photoelectron spectroscopic (XPS) measurements on the Mn in a Norwegian lepidolite which was the subject of a concurrent structural study by X-ray photoelectron diffraction (Evans & Raftery, 1982). To establish the Mn oxidation state we have compared the Mn2p core-electron binding energies (BE), the Mn2P3/2-O ls BE differences, and the Mn2p XPS peak profiles from the four common oxides of manganese (MnO, Mn3O4, Mn2O3 and MnO2) with those from the lepidolite. A re-examination of these oxides was undertaken because the agreement between reports in the literature was unsatisfactory, and uncertainty existed concerning the integrity of some of the surfaces previously examined.

Quantitative Determination of Ligand Densities on Nanomaterials by X-ray Photoelectron Spectroscopy

2015 ◽  
Vol 7 (3) ◽  
pp. 1720-1725 ◽  
Author(s):  
Marco D. Torelli ◽  
Rebecca A. Putans ◽  
Yizheng Tan ◽  
Samuel E. Lohse ◽  
Catherine J. Murphy ◽  
...  
Keyword(s):  
Quantitative Determination ◽  
Photoelectron Spectroscopy ◽  
X Ray

Determination of the Oxidation State of the 99Tc Technetium Isotope on Activated Carbon by X-Ray Photoelectron Spectroscopy

2021 ◽  
Vol 57 (9) ◽  
pp. 893-900
Author(s):  
Yu. A. Teterin ◽  
A. V. Makarov ◽  
A. V. Safonov ◽  
E. V. Zakharova ◽  
K. I. Maslakov ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Oxidation State ◽  
Photoelectron Spectroscopy ◽  
X Ray

scholarly journals An Insight into Chemistry and Structure of Colloidal 2D-WS2 Nanoflakes: Combined XPS and XRD Study

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1969
Author(s):  
Riccardo Scarfiello ◽  
Elisabetta Mazzotta ◽  
Davide Altamura ◽  
Concetta Nobile ◽  
Rosanna Mastria ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Xrd Analysis ◽  
Crystal Habit ◽  
Phase Identification ◽  
X Ray Diffraction ◽  
X Ray ◽  
Morphological Evaluation ◽  
Rational Understanding ◽  
Structural Inspection

The surface and structural characterization techniques of three atom-thick bi-dimensional 2D-WS2 colloidal nanocrystals cross the limit of bulk investigation, offering the possibility of simultaneous phase identification, structural-to-morphological evaluation, and surface chemical description. In the present study, we report a rational understanding based on X-ray photoelectron spectroscopy (XPS) and structural inspection of two kinds of dimensionally controllable 2D-WS2 colloidal nanoflakes (NFLs) generated with a surfactant assisted non-hydrolytic route. The qualitative and quantitative determination of 1T’ and 2H phases based on W 4f XPS signal components, together with the presence of two kinds of sulfur ions, S22− and S2−, based on S 2p signal and related to the formation of WS2 and WOxSy in a mixed oxygen-sulfur environment, are carefully reported and discussed for both nanocrystals breeds. The XPS results are used as an input for detailed X-ray Diffraction (XRD) analysis allowing for a clear discrimination of NFLs crystal habit, and an estimation of the exact number of atomic monolayers composing the 2D-WS2 nanocrystalline samples.

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