Systematic XPS study of gallium-substituted boehmite

Kloprogge, J. Theo and Wood, Barry J. (2016) Systematic XPS study of gallium-substituted boehmite. Journal of Materials Science, 51 11: 5436-5444. doi:10.1007/s10853-016-9847-1


Author Kloprogge, J. Theo
Wood, Barry J.
Title Systematic XPS study of gallium-substituted boehmite
Journal name Journal of Materials Science   Check publisher's open access policy
ISSN 1573-4803
0022-2461
Publication date 2016-06-01
Year available 2016
Sub-type Article (original research)
DOI 10.1007/s10853-016-9847-1
Open Access Status Not Open Access
Volume 51
Issue 11
Start page 5436
End page 5444
Total pages 9
Place of publication New York, NY, United States
Publisher Springer New York LLC
Collection year 2017
Language eng
Abstract Abstract: Ga-substituted boehmites were synthesized using a soft-chemistry route in the presence of poly(ethylene oxide) surfactant under hydrothermal conditions. The effect of Ga-substitution was studied by X-ray diffraction and X-ray photoelectron spectroscopy. Initial precipitates were amorphous (minor bayerite). After hydrothermal treatment, XRD showed broad reflections at low Ga-substation indicating low crystallinity and formation of pseudoboehmite. This was confirmed by high-resolution XPS of Al 2p, Ga 2p, and O 1s. The Al 2p binding energy of 74.03 eV was closer to boehmite than pseudoboehmite, probably caused by the Ga-substitution in the structure. The O 1s showed the presence of O, OH, and H2O. The ratio of (total O)/(Al + Ga) showed an excess of O as expected for pseudoboehmite. The ratio of (O + OH)/Al + Ga) was also slightly larger than the theoretical value of 2 for boehmite. High concentrations of added Ga (10, 20 %) resulted in amorphous material after hydrothermal treatment. Graphical Abstract: [Figure not available: see fulltext.]
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Earth Sciences Publications
HERDC Pre-Audit
Centre for Microscopy and Microanalysis Publications
 
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