Synthesis and catalytic properties of nitrogen-containing carbon nanotubes
نویسندگان
چکیده
Nitrogen-containing carbon nanotubes (CNTs) were synthesized by the CVD method on oxide catalysts of Al-Fe-Mo-O adding acetonitrile or ethylenediamine to source (propylene), completely replacing it, as well impregnating original CNTs with urea, followed heat treatment. The structure nitrogen-containing (N-CNT) was characterized Raman scattering, transmission electron microscopy (TEM), differential thermal and gravimetric analysis (DTA, DTG) X-ray photoelectron spectroscopy (XPS). influence synthesis number chemical state nitrogen heteroatoms in matrix is found. According TEM, have a characteristic bamboo-like structure, which less perfect compared CNTs: bands (G D) are shifted higher frequencies, their half-width band D intensity increase relative G. This also manifested lower stability CNTs. XPS, direct increases total content atoms proportion pyrrolic quaternary against background significant decrease amount pyridinic form. can be explained fact that evenly distributed throughout CNTs, during nitriding included mainly surface layers defects, because pyridine form edge location atom graphene plane.The catalytic effect multilayer kinetics decomposition hydrogen peroxide aqueous solutions at different pH values considered. It concluded allows obtain more catalytically active containing nitrogen, type. has been found regardless synthesis, maximum activity observed 7.
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ژورنال
عنوان ژورنال: Hìmìâ, fìz?ka ta tehnologìâ poverhnì
سال: 2021
ISSN: ['2079-1704', '2518-1238']
DOI: https://doi.org/10.15407/hftp12.02.135