Author:
Yamagishi Takayuki,Yamauchi Shigeru,Shibutani Sakae,Suzuki Hikaru,Takayama Tsutomu,Sakai Yoichi
Abstract
AbstractAn Fe3+-impregnation method was improved to disperse Fe3+ 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 Fe3+ and graphitization. G′(2D)-band was adopted as a marker of graphitic structure formation among Raman scattering due to sp2-carbon. Mössbauer and Raman characterization confirmed that the reduction from Fe3+ to Fe0 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 Fe3+ content in the wood powder were examined in terms of relationship between the reduction of Fe3+ and graphitization. It was suggested that there were multiple reaction paths to graphitization in carbonization.
Funder
grant-in aid for scientific research from the japan society for the promotion of science.
Publisher
Springer Science and Business Media LLC
Cited by
7 articles.
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