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Influence of the Synthetic Conditions on the Structural and Electrochemical Properties of Carbon Nano‐Onions
Author(s) -
Mykhailiv Olena,
Lapinski Andrzej,
MolinaOntoria Agustin,
Regulska Elzbieta,
Echegoyen Luis,
Dubis Alina T.,
PlonskaBrzezinska Marta E.
Publication year - 2015
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201500061
Subject(s) - raman spectroscopy , inert gas , nanostructure , materials science , annealing (glass) , fourier transform infrared spectroscopy , carbon fibers , nanometre , thermogravimetric analysis , nano , electrochemistry , infrared , analytical chemistry (journal) , infrared spectroscopy , chemical engineering , nanotechnology , chemistry , composite material , optics , organic chemistry , electrode , engineering , composite number , physics
Thermal annealing of nanodiamonds with diameters of a few nanometers (in an inert atmosphere and at temperatures in the range: 1500–1800 °C) leads to the formation of carbon nano‐onions (CNOs) with diameters between 5 and 6 nm, which correspond to nanostructures with six to eight graphitic layers. The resulting spherical CNO structures were thermally modified under different atmospheres and characterized by SEM, TEM, thermogravimetric analysis and spectroscopic (Raman and diffuse reflectance infrared Fourier transform/FTIR) spectroscopy. The electrochemical properties of the CNOs prepared under different conditions were determined and compared. The results reveal that the CNOs show different structures with predominant spherical “small” carbon nano‐onions. The aim of this article is to investigate the impact of the CNO′s synthesis conditions on the resulting structures and study the effect of further thermal modifications on the sizes, shapes and homogeneity of these carbon nanostructures.