IEEE Sensors,
Journal Year:
2023,
Volume and Issue:
unknown, P. 1 - 4
Published: Oct. 29, 2023
In
this
work,
we
report
synthesis
of
tungsten
disulfide
(WS2)
platelets
from
sulfurization
commercial
trioxide
powder
$(\text{WO}_{3})$
using
hydrogen
free
atmospheric
pressure
chemical
vapor
deposition
(APCVD)
technique.
This
methodology
has
the
potential
to
be
scaled
up
industrial
scale
owing
its
high
yield,
reproducibility,
low
cost,
and
ease
operation.
Composition
morphological
investigations
revealed
total
conversion
metal
oxide
dichalcogenide
nanosheets.
Gas
sensing
results
showed
obtained
material
in
detecting
NO
2
at
room
temperature.
The
responses
were
remarkable,
stable
reproducible
towards
100
ppb
nitrogen
dioxide
(NO
).
Nanotechnology,
Journal Year:
2024,
Volume and Issue:
35(40), P. 405501 - 405501
Published: July 17, 2024
The
number
of
layers
present
in
a
two-dimensional
(2D)
nanomaterial
plays
critical
role
applications
that
involve
surface
interaction,
for
example,
gas
sensing.
This
paper
reports
the
synthesis
2D
WS
Sensors,
Journal Year:
2025,
Volume and Issue:
25(6), P. 1781 - 1781
Published: March 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.
This
work
presents
a
facile
approach
for
fabricating
hybrid
heterostructures
of
tungsten
disulfide
(WS2),
synthesized
via
atmospheric
pressure
chemical
vapor
deposition
(APCVD)
and
commercial
graphene.
A
simple
airbrushing
technique,
with
nitrogen
(N2)
as
the
carrier
gas,
was
employed
to
fabricate
sensors.
The
morphological
structural
characterizations
material
revealed
sheet-like
synthesis
edge-enriched
2D
WS2
decorated
multilayer
graphene
nanomaterial.
gas-sensing
properties
pristine
materials
were
evaluated
dioxide
(NO2)
at
various
operating
temperatures.
sensor
ratio
3:1
demonstrated
exceptional
sensitivity
ultralow
NO2
concentrations
(10
ppb)
remarkably
low
temperature
100
°C,
outperforming
both
counterparts.
Additionally,
sensor's
responses
CO,
H2,
C6H6,
NH3
examined
assess
its
selectivity.
tested
under
different
relative
humidity
conditions
(RH
25
°C;
25%,
50%,
75%).
response
nearly
doubled
RH
=
highlighting
potential
practical
applications
in
selective
detection.
eventually
reached
saturation
75%
RH.
In
addition,
manuscript
provides
detailed
discussion
gas
sensing
mechanism.
ACS Applied Nano Materials,
Journal Year:
2024,
Volume and Issue:
7(20), P. 24281 - 24290
Published: Oct. 14, 2024
Tin
selenide
(SnSe)
is
gaining
significant
interest
in
the
scientific
research
community
by
virtue
of
its
fascinating
electrical,
chemical,
and
physical
characteristics.
Surprisingly,
incorporation
SnSe
area
gas
sensors
has
been
very
little
explored.
Due
to
distinctive
properties,
can
be
utilized
as
an
effective
material
detect
nitric
oxide
(NO2)
at
ambient
temperature.
In
this
paper,
we
report
optimized
synthesis
nanostructures
through
a
low-cost
hydrothermal
method
their
employment
sensing
for
NO2
detection
(400
ppb
1
ppm).
Different
structures
(nanoparticles,
nanoflakes,
nanoflowers)
were
obtained
depending
upon
varied
growth
times
(12,
16,
20
h).
An
extensive
characterization
study
was
performed,
evidencing
formation
desired
structure
morphology
SnSe.
The
optimum
sensor
(S_16)
exhibited
response
12.11
presence
ppm
room
temperature
(25
°C)
along
with
promising
reversibility.
theoretical
limit
found
116
ppb.
offered
excellent
sensitivity
selectivity
due
high
interactive
tendency
molecules.
demonstrated
work
paves
way
adequate
alternative
utilizing
room-temperature-operated
selective
sensors.
Physical Chemistry Chemical Physics,
Journal Year:
2023,
Volume and Issue:
25(48), P. 32883 - 32903
Published: Jan. 1, 2023
Air
pollution
is
a
worldwide
issue
that
affects
human
health
and
the
environment.
The
scientific
community
tries
to
control
it
through
different
approaches,
from
experimental
theoretical
assessments.
Here,
we
perform
DFT
calculations
describe
CO2,
NO2,
SO2
detection
on
single-atom
(Ti,
Cu,
Zn,
Pt)
graphene
supported
2D
molybdenum
disulfide
(MoS2)
tungsten
(WS2).
Transition
metal
single
atoms
improve
monolayer
reactivity
by
generating
an
effective
way
remove
airborne
pollutants.
Results
indicate
NO2
chemically
adsorb
all
tested
transition
metals,
whereas
CO2
stands
top
of
incorporated
van
der
Waals
interactions.
Since
strong
Ti-O
interactions
appear,
Ti
graphene/MoS2(WS2)
systems
efficiently
Compared
pristine
graphene,
our
proposed
heterostructures
SO2,
adsorption
energies.
heterostructures'
electronic
properties
change
once
molecules
interact
with
sensible
selective
pollutant
molecule
removal.
ACS Applied Nano Materials,
Journal Year:
2024,
Volume and Issue:
7(17), P. 20380 - 20390
Published: Aug. 17, 2024
The
design
of
a
simple
and
safe
method
for
constructing
heterojunction
structures
in
nanocomposites
is
promising
strategy
the
manufacture
high-performance
electrochemical
energy
storage
devices.
In
this
paper,
based
on
"less-liquid"
reaction
system
assistance
generated
NaCl,
heterojunction-containing
zero-dimensional
(0
D)
CoS2/NiS2
nanocomposite
with
particle
sizes
ranging
from
50
to
200
nm
were
prepared.
During
reaction,
reactant
carries
crystalline
water
provide
liquid
environment.
Similarly,
lattice
occupation
NaCl
promotes
construction
large
number
heterogeneous
inside
nanostructured
materials.
prepared
material
was
subsequently
employed
as
cathode
Mg2+/Li+
hybrid
battery
(MLHB).
interface
effect
heterostructures
induces
an
electric
field
within
nanocrystals,
resulting
lower
ion
diffusion
resistance,
facilitating
interfacial
electron
transport.
Therefore,
heterojunctions
accelerated
dynamics
at
interface,
increased
charge-transfer
rate.
Mg2+
Li+
exhibit
reversible
synergistic
effects.
More
specifically,
current
density
0.2
A
g–1,
initial
discharge
specific
capacity
785.5
mAh
while
0.5
317.54
g–1
maintained
over
cycles.
And
Coulombic
efficiency
∼99.8%.
This
nanoscale
materials
provides
developing
MLHB
