Nanomaterials,
Journal Year:
2024,
Volume and Issue:
14(21), P. 1725 - 1725
Published: Oct. 29, 2024
Hydrogen
sulfide
(H2S)
is
a
highly
toxic
and
corrosive
gas
commonly
found
in
industrial
emissions
natural
processing,
posing
serious
risks
to
human
health
environmental
safety
even
at
low
concentrations.
The
early
detection
of
H2S
therefore
critical
for
preventing
accidents
ensuring
compliance
with
regulations.
This
study
presents
the
development
porous
ZnO/SnO2-nanocomposite
sensors
tailored
ultrasensitive
sub-ppb
levels.
Utilizing
screen-printing
method,
we
fabricated
five
different
sensor
compositions—ranging
from
pure
SnO2
ZnO—and
characterized
their
structural
morphological
properties
through
X-ray
diffraction
(XRD)
scanning
electron
microscopy
(SEM).
Among
these,
SnO2/ZnO
composition-weight
ratio
3:4
demonstrated
highest
response
325
°C,
achieving
limit
0.14
ppb.
was
evaluated
detecting
concentrations
ranging
5
ppb
500
under
dry,
humid
air
N2
conditions.
relative
concentration
error
carefully
calculated
based
on
analytical
sensitivity,
confirming
sensor’s
precision
measuring
Our
findings
underscore
significant
advantages
mixture
nanocomposites
enhancing
offering
promising
applications
monitoring
safety.
research
paves
way
advancement
effective
capable
operating
diverse
conditions
high
accuracy.
ACS Sensors,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 5, 2025
Accurate
methods
for
detecting
volatile
organic
compounds
(VOCs)
are
essential
noninvasive
disease
diagnosis,
with
breath
analysis
providing
a
simpler,
user-friendly
alternative
to
traditional
diagnostic
tools.
However,
challenges
remain
in
low-temperature
VOC
solid-state
sensors,
especially
concerning
their
selectivity
and
functionality
at
room
temperature.
Herein,
we
present
key
insights
into
optimizing
multiwalled
carbon
nanotubes
(MWCNTs)/polyaniline
(PANI)
ZnO
nanocomposites
efficient,
light-free
selective
acetone
sensing.
We
showcased
novel
prepared
by
integrating
p-type
MWCNTs/PANI
porous
3D
network
of
n-type
nanoparticles,
synthesized
via
flame
spray
pyrolysis,
varying
the
weight
ratios
between
(namely
1:1,
8:1,
32:1,
64:1).
The
32:1
nanocomposite
exhibited
superior
over
toluene
ethanol,
resulting
promise
even
As
such,
potential
sensing
mechanism
was
proposed,
which
involves
nanoheterojunction
formation
ZnO,
creating
an
accumulation
layer
that
enhances
gas
response.
Moreover,
incorporation
MWCNTs
improved
overall
conductivity
carrier
mobility.
Hence,
believe
this
work
offers
valuable
low-temperature,
sensors.
ACS Sensors,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 10, 2025
The
need
for
efficient
and
reliable
gas
sensors
has
grown
significantly
due
to
increasing
industrial
activities,
transportation,
environmental
pollution,
posing
serious
risks
human
health
the
environment.
Advanced
sensor
technologies
are
crucial
detecting
these
harmful
gases
at
low
concentrations
with
a
high
accuracy.
Nickel
oxide,
p-type
metal
oxide
semiconductor,
emerged
as
promising
candidate
sensing
applications
owing
its
unique
excellent
structural,
electronic,
catalytic
properties
along
chemical
stability.
Interestingly,
possibility
synthesize
NiO
in
versatile
nanostructure
forms:
nanowires,
nanoflowers,
nanospheres,
helps
enhance
surface
area
porosity,
which
critical
factors
improve
adsorption
diffusion.
This
review
presents
comprehensive
assessment
of
latest
advancements
synthesis,
characterization,
gas-sensing
performance
nanostructures.
We
explore
how
structural
modifications,
such
decoration
noble
nanoparticles,
formation
different
composites,
functionalization
self-assembly
sensitivity,
selectivity,
operational
temperature
sensors.
Particular
focus
is
given
integration
novel
nanoheterostructures,
where
p-n
p-p
junctions
improves
charge
transport
overall
response.
Finally,
we
identify
current
challenges
reproducibility,
stability,
operating
conditions,
while
offering
directions
future
research
on
tailoring
nanostructures
more
effective,
scalable,
robust
technologies.
Analytical Chemistry,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 6, 2025
Lithium-ion
batteries
(LIBs)
provide
many
benefits,
but
trace
electrolyte
leakage
can
cause
serious
safety
risks
such
as
thermal
runaway.
Although
gas
sensors
offer
a
potential
solution,
the
complexity
of
solvents
in
LIBs
makes
it
challenging
to
develop
sensing
materials
capable
universally
detecting
multiple
solvent
molecules.
Here,
Ag@Ag2O-functionalized
SnO2
nanoflowers
were
synthesized
using
self-template
pyrolysis
strategy
for
sensitive
detection
both
common
molecules
and
widely
used
electrolytes.
These
sensors,
enhanced
by
abundant
oxygen
vacancies
introduced
Ag@Ag2O
functionalization,
exhibit
excellent
sensitivity,
particularly
dimethyl
carbonate,
with
response
106-100
ppm,
low
limit
11.76
ppb,
rapid
response/recovery
times
(28/55
s)
at
an
operating
temperature
200
°C.
The
sensor
performance
was
validated
density
functional
theory
calculations,
which
corroborated
effectiveness
material.
In
simulated
LIB
scenarios,
puncture
injection,
demonstrated
quick
responses
various
compositions,
indicating
their
practical
applications.
This
study
highlights
effective
method
fabricating
composite
emphasizes
significance
our
universal
approach
monitoring
energy
storage
devices.
