Realizing
low-temperature
detection
of
NO2
is
crucial
to
protecting
the
environment
and
human
health.
In
this
study,
SnS2/SnO2
hexagonal
nanosheets
with
an
average
size
630
nm
were
synthesized
by
a
two-step
process.
Subsequently,
Ag
nanoparticles
modified
on
surface
form
Ag-modified
nanoheterojunctions.
Compared
SnS2
sensors,
Ag/SnS2/SnO2-based
sensors
have
better
gas-sensing
performance
at
optimum
operating
temperature
100
°C,
including
higher
response,
stability,
excellent
selectivity
NO2.
The
response
value
Ag/SnS2/SnO2
sensor
7
ppm
°C
56.4,
which
four
times
than
that
sensor.
outstanding
sensing
properties
can
be
due
combination
modification
formation
SnS2–SnO2
heterojunction.
IEEE Sensors Journal,
Journal Year:
2024,
Volume and Issue:
24(13), P. 20352 - 20359
Published: May 20, 2024
Pure
In
2
O
xmlns:xlink="http://www.w3.org/1999/xlink">3
and
loaded
with
1
mol%,
2
3
mol%
PdO
(PdIn-1,
PdIn-2,
PdIn-3)
were
successfully
synthesized
via
simple
hydrothermal
reduction
methods.
The
characterization
results
revealed
that
the
hollow
nanosphere
morphology
of
was
not
destroyed
after
introduction
PdO.
PdIn-2
exhibited
bigger
specific
surface
area
(45.16
m
2
/g)
than
pure
(32.91
/g).
CO
sensing
showed
lowered
optimal
operating
temperature
sensor
(from
280°C
to
240°C)
reduced
response
recovery
time
10s/110s
6s/109s
for
500
ppm
CO)
compared
sensor.
At
optimum
temperature,
achieves
a
4.15
100
CO,
which
is
3.7
times
.
Additionally,
maintained
good
detection
capability
even
at
higher
relative
humidity
levels
(89%RH).
Besides,
also
has
better
selectivity
long-term
stability
CO.
improvement
gas-sensitized
performance
mainly
attributed
chemical
sensitization
electron
effects
This
study
indicates
PdO-modified
nanospheres
are
promising
materials
sensitive
gas
low
interference.
