In situ XANES study of Co 2+ ion adsorption on Fe 3O 4 nanoparticles in supercritical aqueous fluids
Abstract
In situ x-ray absorption spectroscopy (XAS) measurements were made on Fe 3O 4 nanoparticles in supercritical aqueous fluids to 500°C in order to study their reactivity with Co 2+ aqua ions and to investigate the structural properties of the reacted nanoparticles. The analyses of the x-ray absorption near edge structure (XANES) of XAS indicate that reactivity of Fe 3O 4 nanoparticles with Co 2+ ions is minimal to 200°C but becomes significant in the 250-500°C temperature range. XANES and angular momentum projected density of states (l-DOS) calculations were carried out using the FEFF8.2 code and analyses were made using multi-peak fitting to determine the origin of the features exhibited in the spectra.
Department(s)
Physics, Astronomy, and Materials Science
Document Type
Conference Proceeding
DOI
https://doi.org/10.1557/opl.2012.183
Publication Date
8-16-2012
Recommended Citation
Yan, Hao, Robert A. Mayanovic, Joseph Demster, and Alan J. Anderson. "In situ XANES study of Co 2+ ion adsorption on Fe 3 O 4 nanoparticles in supercritical aqueous fluids." MRS Online Proceedings Library Archive 1383 (2012).
Journal Title
Materials Research Society Symposium Proceedings
