The use of Raman spectroscopy to characterize the carbon materials found in Amazonian anthrosoils
Article first published online: 16 OCT 2012
Copyright © 2012 John Wiley & Sons, Ltd.
Journal of Raman Spectroscopy
Volume 44, Issue 2, pages 283–289, February 2013
How to Cite
Ribeiro-Soares, J., Cançado, L. G., Falcão, N. P. S., Martins Ferreira, E. H., Achete, C. A. and Jorio, A. (2013), The use of Raman spectroscopy to characterize the carbon materials found in Amazonian anthrosoils. J. Raman Spectrosc., 44: 283–289. doi: 10.1002/jrs.4191
- Issue published online: 24 JAN 2013
- Article first published online: 16 OCT 2012
- Manuscript Accepted: 3 SEP 2012
- Manuscript Revised: 31 AUG 2012
- Manuscript Received: 4 MAY 2012
- FAPEMIG (PPM and Pronex BioNC), CNPq (Universal grant), FINEP and FAPERJ
- soil science;
- Terra Preta de Índio;
This manuscript presents the Raman characterization of the stable carbon materials found in a special type of soil, named Terra Preta de Índio (Indian Dark Earths). The Terras Pretas de Índios have been studied as a potential model for sustainable agriculture in the humid tropics. The stability of organic matter and the long-term high-level of ion exchange capacity in these soils are due to unusually high amount of black carbon. Here, we show how Raman spectroscopy can be used to characterize the stable carbon content in the Terras Pretas de Índios (TPI-carbons). The tangential stretching mode (G band) and the disorder-induced mode (D band) are analyzed in comparison to laboratory-produced amorphous carbons at different degree of disorder used here as reference materials. Statistical analysis show predominance of sp2 phase and crystallite sizes within the limit range between nanographite and amorphous carbons, while Raman mapping of a TPI-carbon grain shows that the surface is more disordered than the grain core. The analysis used here can also differentiate the TPI-carbon structures from different types of charcoal. Copyright © 2012 John Wiley & Sons, Ltd.