Hostname: page-component-78c5997874-s2hrs Total loading time: 0 Render date: 2024-11-18T08:52:29.511Z Has data issue: false hasContentIssue false
  • English
  • Français

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

Published online by Cambridge University Press:  07 February 2012

Hao Yan ,
Robert A. Mayanovic ,
Joseph Demster  and
Alan J. Anderson
Hao Yan
Affiliation:
Department of Physics, Astronomy and Materials Science, Missouri State University, Springfield, MO 65897, USA
Robert A. Mayanovic
Affiliation:
Department of Physics, Astronomy and Materials Science, Missouri State University, Springfield, MO 65897, USA
Joseph Demster
Affiliation:
Department of Physics, Astronomy and Materials Science, Missouri State University, Springfield, MO 65897, USA
Alan J. Anderson
Affiliation:
Department of Earth Sciences, St. Francis Xavier University, P.O. Box 5000, Antigonish, Nova Scotia, B2G 2W5, Canada
Get access

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.

Keywords

nanoscalehydrothermalextended x-ray absorption fine structure(EXAFS)
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1383: Symposium A – Material Challenges in Current and Future Nuclear Technologies , 2012 , mrsf11-1383-a07-10
Copyright
Copyright © Materials Research Society 2012

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

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