Hostname: page-component-745bb68f8f-b6zl4 Total loading time: 0 Render date: 2025-01-30T00:01:03.116Z Has data issue: false hasContentIssue false
  • English
  • Français

Surface Characterization of Carbon-Bearing Magnetite (CBM) and Carbon-Bearing Ni(II)-Ferrite (CBNF)

Published online by Cambridge University Press:  15 February 2011

T. Sano ,
K. Akanuma ,
M. Tsuji  and
Y. Tamaura
T. Sano
Affiliation:
Department of Chemistry, Research Center for Carbon Recycling and Utilization, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152, Japan
K. Akanuma
Affiliation:
Department of Chemistry, Research Center for Carbon Recycling and Utilization, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152, Japan
M. Tsuji
Affiliation:
Department of Chemistry, Research Center for Carbon Recycling and Utilization, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152, Japan
Y. Tamaura
Affiliation:
Department of Chemistry, Research Center for Carbon Recycling and Utilization, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152, Japan
Get access

Abstract

Oxygen-deficient magnetite (ODM; Fe3O4-δ, δ>0) synthesized by reduction of magnetite with H2 at 300°C decomposed CO2 to carbon with an efficiency of nearly 100% at 300°C. In this reaction, two oxygen ions of the CO2 were incorporated into the spinel structure of ODM and carbon was deposited on the surface of ODM with zero valence to form visible particles. The particles of carbon separated from ODM were studied by Raman, energy-dispersive X-ray and wave-dispersive X-ray spectroscopies. The carbon which had been deposited on the ODM was found to be a mixture of graphite and amorphous carbon in at least two levels of crystallization. X-ray photoelectron spectroscopy and X-ray diffraction patterns of the carbon-bearing magnetite (CBM) showed no indication of carbide (Fe3C) or metallic iron (α-Fe) phase formation. In the C 1s XPS spectra of the CBM, no peaks were observed which could be assigned to CO2 or CO. X-ray diffractometry, chemical analysis and TG-MS measurement showed that the carbon-bearing Ni(II)-ferrite (CBNF) (Ni(II)/Fetotal = 0.15) synthesized by the carbon deposition reaction from CO2 with the H2-reduced Ni(II)-ferrite was represented by (Ni0.28Fe2.72O4.00)1-δ (Ni2+06.9Fe2+2.31O3.00)δCτ (δ= 0.27, τ= 0.17). The carbon of the CBNF gave the CIOlayer-like oxide containing some Ni2+ ions.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 344: Symposium I – Materials and Processes for Environmental Protection , 1994 , 169
Copyright
Copyright © Materials Research Society 1994

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

1. Tamaura, Y. and Tabata, M., Nature 346, 255 (1990).Google Scholar
2. Tamaura, Y., Proc. Int. Symp. Chemical Fixation Carbon Dioxide, Nagoya, 1991, pp. 167–172.Google Scholar
3. Tamaura, Y. and Nishizawa, K., Energy Convers. Mgmt. 33, 573 (1992).Google Scholar
4. Akanuma, K., Nishizawa, K., Kodama, T., Tabata, M., Mimori, K., Yoshida, T., Tsuji, M. and Tamaura, Y., J. Mater. Sci. 28, 860 (1993).Google Scholar
5. Nishizawa, K., Kodama, T., Tabata, M., Yoshida, T., Tsuji, M. and Tamaura, Y., J. Chem. Soc. Faraday Trans. 88, 2771 (1992).Google Scholar
6. Nishizawa, K., Kato, H., Mimori, K., Yoshida, T., Hasegawa, N., Tsuji, M. and Tamaura, Y., J. Mater. Sci. 29, 768 (1994).Google Scholar
7. Tamaura, Y., Tanno, Y. and Abe, M., Bull. Chem. Soc. Jpn. 158, 1500 (1985).Google Scholar
8. Abe, M., Tamaura, Y., Goto, Y., Kitamura, N. and Gomi, M., J. Appl. Phis. 61, 1447 (1987).Google Scholar
9. Akanuma, K., Tabata, M., Hasegawa, N., Tsuji, M., Tamaura, Y., Nakahara, Y. and Hoshino, S., J. Mater. Chem. 3, 943 (1993).Google Scholar
10. Katsura, T., Tamaura, Y. and Chyo, G. S., Bull. Chem. Soc. Jpn. 52, 96 (1979).Google Scholar
11. Kodama, T., Kato, H., Chang, S. G., Hasegawa, N., Tsuji, M. and Tamaura, Y., J. Mater. Res. in press.Google Scholar
12. Iwasaki, I., Katsura, T., Ozawa, T., Yoshida, M., Mashima, M., Haramura, H. and Iwasaki, B., Bull. Volcanol. Soc. Jpn. Ser. II 5, 9 (1960).Google Scholar
13. Mills, P. and Sullivan, J. L., J. Phys. D: Appl. Phys. 16, 723 (1983).Google Scholar
14. Ertl, G. and Wandelt, K., Surf. Sci. 50, 479 (1975).Google Scholar
15. Allen, G. C., Curtis, M. T., Hooper, A. J. and Tucker, P. M., J. Chem. Soc. Dalton Trans., 1525 (1974).Google Scholar
16. Katagiri, G., Ishida, H. and Ishitani, A., Carbon 26, 565 (1988).Google Scholar
17. Fitzer, E. and Rozploch, F., Carbon 26, 594 (1988).Google Scholar
18. Akanuma, K., Hasegawa, N., Tsuji, M. and Tamaura, Y., Proc. of the Int. Symp. on CO2 Fixation and Efficient Utilization of Energy, Tokyo, 1993, pp. 233–238.Google Scholar