Synthesis of Nitrogen-Doped Carbon Nanodots from Ethylene Amine
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Date
2024-02-06
Authors
Anhar Azizeh
Ansam Zedan
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Abstract
Abstract
Carbon nanodots are a new emerging class of carbon allotropes having excellent properties
which make them good candidates for different applications. CNDs can be doped with
different elements such as N, S, and P. N doped CNDs have been synthesized by different
researchers by using different resources and a variety of methods.
In this work, N
doped CNDs will be synthesized from triethylenetetramine and Penta
ethylene hexamine by direct thermal method, studying the effect of using hydroge n
peroxide as an oxidant and/or catalyst agent on completion time, product yield, quantum
yield and optical properties such as energy bandgap. It was found that the addition of
hydrogen peroxide improved the completion time and product yield for both precu rsors
with a minimum of 7 minutes to synthesize CNDs from triethylenetetramine and the
highest product yield of 46% for CNDs from Penta ethylene hexamine. About 15%
Quantum yield has been attained for CNDs synthesized from triethylenetetramine in the
absen ce of hydrogen peroxide with gradual decay upon the addition of H 2 O 2 . The presence
of H 2 O 2 also affects the energy bandgap of CNDs prepared from triethylenemelamine with
a slight decrease upon its increase.
The FT
IR and XPS acquisition have proved the sa ucerful synthesis of N doped CNDs
from both precursors, that was clear from the higher percentage of nitrogen element about
17 at. % and the nitrogen functional groups existed on the CNDs surfaces.