Chemosensors,
Journal Year:
2024,
Volume and Issue:
12(3), P. 42 - 42
Published: March 5, 2024
This
paper
aims
to
provide
a
large
coverage
of
recent
developments
regarding
environmental
monitoring
using
metal
oxide-based
sensors.
Particular
attention
is
given
the
detection
gases
such
as
H2,
COx,
SOx,
NOx,
and
CH4.
The
analyses
design
sensors
types
oxide
sensing
materials
are
emphasized.
mechanisms
peculiarities
oxides
used
in
chemoresistive
provided.
main
parameters
that
affect
sensitivity
selectivity
indicated
their
significance
sensor
signal
analyzed.
Modern
data
processing
algorithms,
employed
optimize
measurement
process
signal,
considered.
existing
arrays/e-nose
systems
for
summarized,
future
prospects
challenges
encountered
with
arrays
highlighted.
ACS Applied Nano Materials,
Journal Year:
2024,
Volume and Issue:
7(8), P. 8661 - 8670
Published: April 5, 2024
Real-time
monitoring
of
carbon
monoxide
(CO)
is
crucial
for
ensuring
human
safety.
However,
the
accuracy
CO
detection
significantly
diminished
by
high
ambient
humidity.
This
study
focuses
on
synthesizing
CeO2/In2O3
hollow
nanospheres
with
varying
CeO2
contents
(0,
1,
2,
3
mol
%)
using
a
two-step
method.
Testing
under
different
humidity
conditions
demonstrates
that
incorporating
not
only
amplifies
response
rate
pure
In2O3
sensors
(from
1.4
to
1.65
at
100
ppm
CO)
but
also
curtails
and
recovery
times
11
s/27
s
6
s/23
s)
280
°C.
Furthermore,
composite
exhibit
improved
selectivity,
repeatability,
long-term
stability.
Notably,
robust
performance
verifies
fabricated
can
monitor
in
humid
environments.
The
enhanced
stems
from
unique
structure,
abundant
mesopores
surface,
heterojunction
between
In2O3.
Advanced Materials Technologies,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 8, 2025
Abstract
Methane
(CH
4
)
serves
as
a
commonly
utilized
fuel
gas
in
various
industrial
and
everyday
settings.
Given
its
flammable,
explosive,
greenhouse
nature,
the
real‐time
monitoring
of
concentration
air
holds
vital
importance
across
practical
applications.
The
tetrahedral
structure
methane
molecules
features
high
bond
energies,
posing
significant
challenge
for
chemical
detection
over
metal
oxide‐sensitive
layers.
In
this
research,
multicomponent
assembly
method
is
used
to
synthesize
ordered
mesoporous
tin
oxide
(SnO
2
with
uniform
large
mesopores
(≈
10
nm)
pore
wall
functionalized
Pd
x
Pt
nanoalloys
2.5
nm),
due
unusual
C–H
activation
capabilities
semiconducting
properties
SnO
,
obtained
Pt@m‐SnO
fabricate
sensors
which
showcases
wide
applicability
range
detecting
concentrations
ranging
from
50
20
000
ppm
at
400
°C,
it
yields
substantial
CH
response
9.19
(1000
ppm)
an
ultralow
limit
value
175.9
ppb.
Furthermore,
sensor
successfully
incorporated
into
portable
device,
evidencing
capability
accurate
real‐world
scenarios.
Chemosensors,
Journal Year:
2024,
Volume and Issue:
12(3), P. 45 - 45
Published: March 8, 2024
The
review
paper
provides
a
comprehensive
analysis
of
nickel
oxide
(NiO)
as
an
emerging
material
in
environmental
monitoring
by
surveying
recent
developments
primarily
within
the
last
three
years
and
reports
growth
processing
strategies
employed
to
enhance
NiO
sensing
performance.
It
covers
synthesis
methods
for
pristine
NiO,
including
vapor-phase,
liquid-phase,
solution-processing
techniques,
highlighting
advantages
limitations.
mechanisms
nanostructures
are
explored,
with
focus
on
most
research
studies.
Additionally,
different
improve
gas
performance
discussed
(i.e.,
surface
functionalization
metallic
nanoparticles,
heterostructure
formation,
carbon-based
nanomaterials,
conducting
polymers).
influence
these
selectivity,
sensitivity,
response
time,
stability
NiO-based
sensors
is
thoroughly
examined.
Finally,
challenges
future
directions
that
may
lead
successful
development
highly
efficient
introduced
this
review.
