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Mössbauer and Raman characterization of iron-loaded woody charcoal: effects of Fe3+-dispersion in wood on reduction of Fe3+ and graphitization in carbonization
Ist Teil von
Journal of wood science, 2022-12, Vol.68 (1), p.1-15, Article 7
Ort / Verlag
Singapore: Springer Singapore
Erscheinungsjahr
2022
Link zum Volltext
Quelle
SpringerNature Journals
Beschreibungen/Notizen
An Fe
3+
-impregnation method was improved to disperse Fe
3+
in wood powder more homogeneously, and the wood powder was carbonized at various temperatures. The obtained iron-loaded charcoal samples were analyzed using Mössbauer and Raman spectroscopy to understand the effects of the improved method on the reduction of Fe
3+
and graphitization. G′(2D)-band was adopted as a marker of graphitic structure formation among Raman scattering due to sp
2
-carbon. Mössbauer and Raman characterization confirmed that the reduction from Fe
3+
to Fe
0
is closely related with the graphitization in charcoal; however, both the chemical changes progressed rapidly from a much lower temperature-range and graphitization occurred more uniformly compared with charcoal synthesized using the previous method containing no decompression-impregnation processes. Moreover, the effects of holding time at carbonization temperature and Fe
3+
content in the wood powder were examined in terms of relationship between the reduction of Fe
3+
and graphitization. It was suggested that there were multiple reaction paths to graphitization in carbonization.