X-ray photoelectron spectroscopy of CeO2-Na 2O-SiO2 glasses

A. Mekki

doi:10.1016/j.elspec.2004.09.001

X-ray photoelectron spectroscopy of CeO₂-Na ₂O-SiO₂ glasses

A. Mekki^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

52 Scopus citations

Abstract

A series of (CeO₂)_x-(Na₂O) _0.3-(SiO₂)_(0.7-x) glasses, where 0.025 ≤ x ≤ 0.075, have been synthesized nd investigated by mean of X-ray photoelectron spectroscopy (XPS). The Ce 3d spin-orbit doublet was curve fitted in order to quantify the proportions of each cerium oxidation state in these glasses. It was found that Ce ions are predominantly in the Ce(III) state in glasses with compositions x ≤ 0.075, while mixed Ce valences were found in the glass with composition x = 0.10. The O 1s spectra have also been curve fitted with two components, one from bridging oxygen (BO) and the other from non-bridging oxygen atoms (NBO). The measured number of NBO, based on the fact that only oxygen atoms in the site Si-O-Na⁺ contribute to the NBO peak, was found to be constant at ∼35% for all samples, in good agreement with the value calculated from the glass composition and inductively coupled plasma (ICP) suggesting that Ce ions enter the network as a glass intermediate. The thermal measurements done on these glasses agree well with the XPS findings.

Original language	English
Pages (from-to)	75-81
Number of pages	7
Journal	Journal of Electron Spectroscopy and Related Phenomena
Volume	142
Issue number	1
DOIs	https://doi.org/10.1016/j.elspec.2004.09.001
State	Published - Jan 2005

Bibliographical note

Funding Information:
The author would like to acknowledge the support of Physics Department at KFUPM and the Research Institute at KFUPM for the ICP measurements. I also thank Dr. D. Holland at Warwick University for providing the sample preparation and the thermal measurements facilities.

Keywords

Bridging oxygen
Ce 3d
Non-bridging oxygen
O 1s
Rare earth oxide glasses
XPS

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Radiation
Atomic and Molecular Physics, and Optics
Condensed Matter Physics
Spectroscopy
Physical and Theoretical Chemistry

Access to Document

10.1016/j.elspec.2004.09.001

Cite this

@article{382dc080e5fc4b87985d399e1d0a0391,

title = "X-ray photoelectron spectroscopy of CeO2-Na 2O-SiO2 glasses",

abstract = "A series of (CeO2)x-(Na2O) 0.3-(SiO2)(0.7-x) glasses, where 0.025 ≤ x ≤ 0.075, have been synthesized nd investigated by mean of X-ray photoelectron spectroscopy (XPS). The Ce 3d spin-orbit doublet was curve fitted in order to quantify the proportions of each cerium oxidation state in these glasses. It was found that Ce ions are predominantly in the Ce(III) state in glasses with compositions x ≤ 0.075, while mixed Ce valences were found in the glass with composition x = 0.10. The O 1s spectra have also been curve fitted with two components, one from bridging oxygen (BO) and the other from non-bridging oxygen atoms (NBO). The measured number of NBO, based on the fact that only oxygen atoms in the site Si-O-Na+ contribute to the NBO peak, was found to be constant at ∼35\% for all samples, in good agreement with the value calculated from the glass composition and inductively coupled plasma (ICP) suggesting that Ce ions enter the network as a glass intermediate. The thermal measurements done on these glasses agree well with the XPS findings.",

keywords = "Bridging oxygen, Ce 3d, Non-bridging oxygen, O 1s, Rare earth oxide glasses, XPS",

author = "A. Mekki",

note = "Funding Information: The author would like to acknowledge the support of Physics Department at KFUPM and the Research Institute at KFUPM for the ICP measurements. I also thank Dr. D. Holland at Warwick University for providing the sample preparation and the thermal measurements facilities. ",

year = "2005",

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doi = "10.1016/j.elspec.2004.09.001",

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volume = "142",

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T1 - X-ray photoelectron spectroscopy of CeO2-Na 2O-SiO2 glasses

AU - Mekki, A.

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PY - 2005/1

Y1 - 2005/1

N2 - A series of (CeO2)x-(Na2O) 0.3-(SiO2)(0.7-x) glasses, where 0.025 ≤ x ≤ 0.075, have been synthesized nd investigated by mean of X-ray photoelectron spectroscopy (XPS). The Ce 3d spin-orbit doublet was curve fitted in order to quantify the proportions of each cerium oxidation state in these glasses. It was found that Ce ions are predominantly in the Ce(III) state in glasses with compositions x ≤ 0.075, while mixed Ce valences were found in the glass with composition x = 0.10. The O 1s spectra have also been curve fitted with two components, one from bridging oxygen (BO) and the other from non-bridging oxygen atoms (NBO). The measured number of NBO, based on the fact that only oxygen atoms in the site Si-O-Na+ contribute to the NBO peak, was found to be constant at ∼35% for all samples, in good agreement with the value calculated from the glass composition and inductively coupled plasma (ICP) suggesting that Ce ions enter the network as a glass intermediate. The thermal measurements done on these glasses agree well with the XPS findings.

AB - A series of (CeO2)x-(Na2O) 0.3-(SiO2)(0.7-x) glasses, where 0.025 ≤ x ≤ 0.075, have been synthesized nd investigated by mean of X-ray photoelectron spectroscopy (XPS). The Ce 3d spin-orbit doublet was curve fitted in order to quantify the proportions of each cerium oxidation state in these glasses. It was found that Ce ions are predominantly in the Ce(III) state in glasses with compositions x ≤ 0.075, while mixed Ce valences were found in the glass with composition x = 0.10. The O 1s spectra have also been curve fitted with two components, one from bridging oxygen (BO) and the other from non-bridging oxygen atoms (NBO). The measured number of NBO, based on the fact that only oxygen atoms in the site Si-O-Na+ contribute to the NBO peak, was found to be constant at ∼35% for all samples, in good agreement with the value calculated from the glass composition and inductively coupled plasma (ICP) suggesting that Ce ions enter the network as a glass intermediate. The thermal measurements done on these glasses agree well with the XPS findings.

KW - Bridging oxygen

KW - Ce 3d

KW - Non-bridging oxygen

KW - O 1s

KW - Rare earth oxide glasses

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