Journal
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
Volume 121, Issue -, Pages 165-172Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jaap.2016.07.017
Keywords
Biochar; Nanoparticle; Nanomaterial; Black carbon; Charcoal
Funding
- Switzerland through the Swiss Contribution
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The research on biochar is focused primarily on the estimation of biochar as a macro fraction, and not much attention is devoted to its fractions with finer particles. The aim of the study was to characterize the physicochemical properties of biochar nanoparticles (biochar-NPs). The properties of the biochar-NPs were also compared to the properties of initial biochars. The results of this study indicate that the properties of biochar-NPs differ from the properties of their macro-counterparts. The differences were observed in the pH, cation exchange capacity, content of particular elements, and aromaticity/polarity not only based on the type of biochars, but also the regularities in the differences between their macro and nano-forms. The nano-biochars had a larger surface area and smaller pore sizes than the corresponding macro-biochars and were characterized by a higher negative zeta potential and greater diversity of crystalline forms than the macro-biochar. Moreover, nano-biochar had significantly lower levels of C, H, and N compared to macro biochars. (C) 2016 Elsevier B.V. All rights reserved.
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