Characterization and Application of Nanomaterials,
Journal Year:
2025,
Volume and Issue:
8(1), P. 10521 - 10521
Published: Jan. 15, 2025
Nickel
Oxide
(NiO)
nanoparticles
(NPs),
doped
with
manganese
(Mn)
and
cobalt
(Co)
at
concentrations
up
to
8%,
were
synthesized
using
the
composite
hydroxide
method
(CHM).
X-ray
diffraction
(XRD)
analysis
confirmed
formation
of
a
cubic
NiO
structure,
no
additional
peaks
detected,
indicating
successful
doping.
The
average
crystallite
size
was
determined
range
from
15
17.8
nm,
depending
on
dopant
concentration.
Scanning
electron
microscopy
(SEM)
images
revealed
mostly
spherical,
agglomerated
particles,
likely
due
magnetic
interactions.
Fourier
Transform
Infrared
Spectroscopy
(FTIR)
incorporation
Mn
Co
into
lattice,
consistent
XRD
results.
dielectric
properties
exhibited
high
constant
low
frequencies,
which
can
be
attributed
ion
jump
orientation
space
charge
effects.
imaginary
part
decreased
increasing
frequency,
as
it
became
harder
for
electrons
align
alternating
field
higher
frequencies.
Both
real
constants
showed
behavior
Koop’s
theory,
frequencies
decreasing
Dielectric
loss
primarily
dipole
flipping
migration.
AC
conductivity
increased
small
polaron
hopping.
These
co-doped
NPs
show
potential
applications
in
solid
oxide
fuel
cells.
