Sensors,
Journal Year:
2024,
Volume and Issue:
25(1), P. 114 - 114
Published: Dec. 27, 2024
Zinc
oxide
nanoparticles
(ZnO
NPs)
with
varying
levels
of
nitrogen
(N)
doping
were
synthesized
using
a
straightforward
sol–gel
approach.
The
morphology
and
microstructure
the
N-doped
ZnO
NPs
examined
through
techniques
such
as
SEM,
XRD,
photoluminescence,
Raman
spectroscopy.
characterization
revealed
visible
changes
in
resulting
from
incorporation
into
lattice.
These
used
fabrication
conductometric
gas
sensors
designed
to
operate
at
room
temperature
(RT)
for
detecting
low
concentrations
NO2
air,
under
LED
UV-Vis
irradiation
(λ
=
400
nm).
influence
on
sensor
performance
was
systematically
studied.
findings
indicate
that
N-doping
effectively
enhances
ZnO-based
sensors’
ability
detect
RT,
achieving
notable
response
(S
R/R0)
approximately
18
when
exposed
5
ppm
NO2.
improvements
gas-sensing
capabilities
are
attributed
reduction
particle
size
narrowing
optical
band
gap.
Scientific Reports,
Journal Year:
2024,
Volume and Issue:
14(1)
Published: Oct. 18, 2024
N-butanol
is
well
known
to
be
a
flammable
and
harmful
liquid
that
potential
threat
human
health
property.
Therefore,
it
important
monitor
the
concentration
of
n-butanol
in
surroundings.
The
need
for
highly
efficient
toxic
gas
detection
urgent
has
been
driving
research
on
sensors
practical
applications.
Molybdenum
disulfide
(MoS2)
attracting
significant
interest
at
room
temperature.
Herein,
we
report
biofunctionalized
magnetic
nanoparticles
incorporated
MoS2
sensing
n-butanol.
biosynthesized
magnetite
(CT-Fe3O4)
were
synthesized
by
addition
Cinnamomum
Tamala
(CT)
leaf
extract,
subsequently,
nanocomposite
was
using
hydrothermal
method.
Highly
sensitive
based
MoS2-CT-Fe3O4
fabricated
tested
different
concentrations
nanocomposites
showed
good
performance
(
$$\Delta$$
R/Rair
%)
72%
towards
20
ppm
n-butanol,
indicating
use
Scientific Reports,
Journal Year:
2024,
Volume and Issue:
14(1)
Published: Nov. 29, 2024
Gallium-doped
zinc
oxide
(GZO)
has
demonstrated
significant
potential
in
gas-sensing
applications
due
to
its
enhanced
electrical
and
chemical
properties.
This
study
focuses
on
the
synthesis,
characterization,
performance
of
GZO
nanoparticles
(NPs),
specifically
targeting
CO₂
detection,
which
is
crucial
for
environmental
monitoring
industrial
safety.
The
samples
were
synthesized
using
a
sol–gel
method,
their
crystal
structure
was
determined
through
X-ray
diffraction
(XRD),
confirming
successful
incorporation
gallium
into
ZnO
lattice.
photoelectron
spectroscopy
(XPS)
employed
analyze
samples'
elemental
composition
state,
revealing
presence
Ga
matrix
providing
insights
doping
effects.
Transmission
electron
microscopy
(TEM)
combined
with
energy-dispersive
(EDS)
used
confirm
purity
distribution
samples,
ensuring
homogeneity
doping.
In-situ
TEM
measurements
also
conducted
one
three
smallest
size.
experiment
involved
exposing
sample
argon
(Ar)
as
reference
gas
carbon
dioxide
(CO₂)
target
evaluate
sensor's
response
under
real-time
conditions.
in-situ
provided
nanoscale
observation
changes
parameters,
particularly
d-spacing,
exhibited
alterations
exceeding
3.2%
when
exposed
Ar
gases.
Furthermore,
paramagnetic
resonance
(EPR)
optical
joint
density
states
(OJDS)
analyses
performed
examine
defects
comprehensively
understand
electronic
within
sample,
respectively.
