Communications in Physics,
Год журнала:
2024,
Номер
34(4), С. 413 - 413
Опубликована: Дек. 19, 2024
A
facile
and
controllable
one-step
atmospheric
pressure
microplasma
method
was
employed
to
synthesize
nitrogen-doped
carbon
quantum
dots
(N-CQDs)
with
tunable
optical
properties.
The
N-CQDs
were
characterized
using
Fourier
transform
infrared
spectroscopy,
high-resolution
transmission
electron
microscopy,
UV‒Vis
absorption
photoluminescence
spectroscopy.
HRTEM
revealed
uniformly
distributed
spherical
nanoparticles
a
graphite-like
structure.
FTIR
confirmed
effective
nitrogen
doping,
enhancing
chemical
stability.
spectroscopy
redshifted
peaks,
indicating
improved
electronic
interactions
reduced
bandgap
(4.05
eV)
compared
those
of
undoped
CQDs
(4.18
eV).
PL
analysis
excitation-dependent
emission
significantly
higher
yield
(PLQY)
33.09%.
These
results
suggest
that
hold
promise
for
applications
in
optoelectronics
bioimaging,
providing
foundation
further
optimization
future
studies.
ACS Applied Nano Materials,
Год журнала:
2024,
Номер
7(16), С. 19668 - 19676
Опубликована: Авг. 12, 2024
Glucose
can
form
carbon
material
under
hydrothermal
conditions.
Thus,
carbon-layer-coated
nickel
sulfide
nanoparticles
were
prepared
using
a
one-step
method
with
as
the
primary
phase.
The
effect
of
glucose
mass
on
structure
and
electrochemical
properties
was
studied
in
detail.
size
decreased
after
surface
coated
by
layer,
forming
uniform
spherical
particles
200–300
nm.
layer
thickness
∼3
nitrogen
adsorption–desorption
test
revealed
that
specific
area
pristine
2.7
m2
g–1.
Under
optimal
conditions,
(NixSy-0.5)
depicted
15.2
high
provided
additional
electrochemically
active
sites.
glucose-derived
could
be
utilized
conductive
agent
to
enhance
electron
transport
electrode.
Electrochemical
results
capacitance
NixSy-0.5
612.5
C
g–1
at
1
A
g–1,
higher
than
(381.7
g–1).
hybrid
supercapacitor
(HSC)
assembled
positive
electrode
commercial
activated
(AC)
negative
exhibited
energy
density
47
Wh
kg–1.
retention
rate
is
(99%)
20
000
cycles.
This
study
demonstrated
simultaneous
preparation
sulfide–carbon
composites
feasible
strategy
for
preparing
economical
efficient
materials.
