Flower-like MoS2-Induced α-Fe2O3/Fe2(MoO4)3 Nanocomposite as an Ultrafast Sensor for Ethanol Detection
Langmuir,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 27, 2025
An
ultrafast-responsive
α-Fe2O3/Fe2(MoO4)3
nanocomposite
was
developed
for
the
detection
of
ethanol
vapor.
The
synthesized
utilizing
a
green,
normal-pressure,
microwave-assisted
method
followed
by
an
in
situ
solid-state
reaction
process
with
flower-like
MoS2
as
unique
precursor.
resulting
composite
presents
porous,
agminated
petal-like
structure
α-Fe2O3
nanoparticles
homogeneously
attached
to
surfaces
Fe2(MoO4)3
nanosheets.
Systematic
analyses
have
demonstrated
that
excels
gas-sensing
performance,
exhibiting
ultrafast
response/recovery,
high
sensitivity,
and
selectivity
vapor
concentrations
ranging
from
1
50
ppm.
5-Fe2O3/Fe2(MoO4)3
sensor
exhibits
best
properties
comparison
sensors
other
ratios.
At
optimal
temperature
200
°C,
achieves
peak
response
ppm
time
5
s
12.8.
Notably,
boasts
impressive
3
at
240
while
maintaining
times
under
6
recovery
within
min
across
range
160
°C.
In
addition,
demonstrates
good
long-term
stability.
enhanced
ethanol-sensing
could
be
attributed
its
three-dimensional
porous
structure,
synergistic
effect
between
species,
presence
oxygen
vacancy
defects.
Язык: Английский
Highly Selective Room-Temperature Blue LED-Enhanced NO2 Gas Sensors Based on ZnO-MoS2-TiO2 Heterostructures
Sensors,
Год журнала:
2025,
Номер
25(6), С. 1781 - 1781
Опубликована: Март 13, 2025
This
study
presents
the
fabrication
and
characterization
of
highly
selective,
room-temperature
gas
sensors
based
on
ternary
zinc
oxide–molybdenum
disulfide–titanium
dioxide
(ZnO-MoS2-TiO2)
nanoheterostructures.
Integrating
two-dimensional
(2D)
MoS2
with
oxide
nano
materials
synergistically
combines
their
unique
properties,
significantly
enhancing
sensing
performance.
Comprehensive
structural
chemical
analyses,
including
scanning
electron
microscopy
(SEM),
energy-dispersive
X-ray
spectroscopy
(EDX),
Raman
spectroscopy,
Fourier
transform
infrared
(FTIR),
confirmed
successful
synthesis
composition
The
demonstrated
excellent
selectivity
in
detecting
low
concentrations
nitrogen
(NO2)
among
target
gases
such
as
ammonia
(NH3),
methane
(CH4),
carbon
(CO2)
at
room
temperature,
achieving
up
to
58%
sensitivity
4
ppm
6%
0.1
for
NO2.
prototypes
outstanding
a
short
response
time
approximately
0.51
min.
impact
light-assisted
enhancement
was
examined
under
1
mW/cm2
weak
ultraviolet
(UV),
blue,
yellow,
red
light-emitting
diode
(LED)
illuminations,
blue
LED
proving
deliver
highest
sensor
responsiveness.
These
results
position
ZnO-MoS2-TiO2
nanoheterostructures
sensitive
selective
NO2
that
are
suitable
applications
environmental
monitoring,
public
health,
industrial
processes.
Язык: Английский