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In situ XANES Study of Co2+ Ion Adsorption on Fe3O4 Nanoparticles in Supercritical Aqueous Fluids

  • Hao Yan (a1), Robert A. Mayanovic (a1), Joseph Demster (a1) and Alan J. Anderson (a2)
Abstract
ABSTRACT

In situ x-ray absorption spectroscopy (XAS) measurements were made on Fe3O4 nanoparticles in supercritical aqueous fluids to 500 °C in order to study their reactivity with Co2+ 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 Fe3O4 nanoparticles with Co2+ 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.

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1.Technology and Applied R&D Needs for Materials under Extreme Environments (DOE, 2007).
2.Mayanovic R.A., Anderson A.J., Bassett W.A., and Chou I.-M., Rev. Sci. Instrum. 78, 053904 (2007).
3.Mayanovic R.A., Yan H., Anderson A.J., Meredith P.R., and Bassett W.A., Journal of Physical Chemistry C, DOI: 10.1021/jp2067793 (2011).
4.Bassett W.A., European Journal of Mineralogy 15, 773 (2003).
5.Chou I.-M., Bassett W.A., Anderson A.J., Mayanovic R.A., and Shang L., Rev. Sci. Instrum. 79, 115103 (2008).
6.Yan H., Mayanovic R.A., Anderson A.J., and Meredith P.R., Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 649, 207 (2011).
7.Wagner W., Journal of Physical and Chemical Reference Data 31, 387 (1999).
8.Ankudinov A.L., Ravel B., Rehr J.J., and Conradson S.D., Phys. Rev. B 58, 7565 (1998).
9.Hedin L. and Lundqvist B.I., Journal of Physics C: Solid State Physics 4, 2064 (1971).
10.Uheida A., Salazar-Alvarez G., Björkman E., Yu Z., and Muhammed M., Journal of Colloid and Interface Science 298, 501 (2006).
11.Yan H., Mayanovic R.A., Anderson A.J., and Meredith P.R., (Unpublished data).
12.Chen L.X., Liu T., Thurnauer M.C., Csencsits R., and Rajh T., J. Phys. Chem. B 106, 8539 (2002).
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