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Speciation of functional groups formed on the surface of ammoxidised carbonaceous materials by XPS method
Authors:Leszek Wachowski  Janusz W. Sobczak
Affiliation:a Faculty of Chemistry, Adam Mickiewicz University, Grunwaldzka 6, 60-780 Poznań, Poland
b Institute of Physical Chemistry, Polish Academy of Science, Kasprzaka 44/52, 01-224 Warszawa, Poland
Abstract:
X-ray photoelectron spectroscopy (XPS) has been used to investigate the fate of nitrogen functional groups present in carbonaceous materials obtained from European plum (Prunus domestica) stones and modified by ammonia-air mixture at 250 or 300 °C. Peaks have been found in the XPS patterns, corresponding to different nitrogen functional forms i.e. pyrrolic, pyridinic, pyridone, amine and chemisorbed nitrogen oxides. It has been found that the distribution of nitrogen functional forms changes as a result of the modification processes.
Keywords:Waste plum stones   Organic material enriched in nitrogen   X-ray photoelectron microscopy   Nitrogen functionalities
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