Porous
Zn3Mo2O9
microflowers
assembled
with
cross-linked
nanosheets
were
synthesized
using
a
facile
hydrothermal
method
combined
calcination.
The
morphology,
structure,
composition,
and
specific
surface
area
of
the
sample
characterized
range
techniques.
used
as
sensing
materials
to
fabricate
gas
sensors
for
volatile
organic
compounds.
When
exposed
100
ppm
ethanol,
compared
pure
MoO3
nanorods
sensor,
sensor
exhibited
stronger
response
58.3
at
220
°C,
shorter
response/recovery
times
(10
s/14
s).
excellent
stability
repeatability
demonstrated
by
exposure
ethanol
10
cycles.
detected
limit
vapor
was
low
29
ppb.
superior
properties
attributed
favorable
porous
nanosheets,
higher
porosity,
large
area,
relative
percentage
OC
OV,
oxidative
catalytic
activation.
This
advantageous
providing
abundant
active
sites
adsorption
molecules,
well
accelerating
oxidation
more
molecules
between
oxygen
species
gas.
have
great
potential
detecting
alcohol
gases.
Journal of Materials Chemistry A,
Год журнала:
2023,
Номер
11(44), С. 23742 - 23771
Опубликована: Янв. 1, 2023
Metal
oxides
have
been
extensively
used
in
environmental
monitoring,
breath
analysis,
and
food
quality
assessment.
This
review
summarizes
the
effects
of
nanoscale
heterojunctions
on
enhancing
gas-sensing
performance
metal
oxide
devices.
Advanced Sensor and Energy Materials,
Год журнала:
2024,
Номер
3(2), С. 100093 - 100093
Опубликована: Фев. 24, 2024
The
advancement
of
gas
sensor
technology
over
the
past
decades
has
led
to
remarkable
progress
and
achievements
in
pollution
control
environmental
protection.
Compared
with
other
sensing
materials,
electrospun
nanofibers
have
attracted
significant
attention,
which
is
mainly
due
their
unique
characteristics,
including
but
not
limited
high
surface
area,
easy
structure
design,
facile
facility
setup,
multifunctional
properties,
etc.,
making
them
outstanding
candidates
for
potential
applications
this
field.
This
review
provides
an
overview
sensors,
concentrating
on
carbon
monoxide,
hydrogen,
dioxide,
hydrogen
sulfide,
ammonia,
nitrogen
oxides,
oxygen,
volatile
organic
compounds.
It
begins
a
brief
introduction
materials
advantages
along
ongoing
research.
principles
electrospinning
are
then
discussed.
Afterward,
corresponding
properties
diverse
sensors
thoroughly
reviewed.
Finally,
future
vision
regarding
challenges
perspectives
area
proposed.
extensive
comprehensive
reference
utilize
advanced
generate
novel
facilitating
performance
high-demand
areas.
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.
Applied Surface Science,
Год журнала:
2023,
Номер
637, С. 157929 - 157929
Опубликована: Июль 1, 2023
Gas
sensors
are
essential
devices
in
various
industrial
and
environmental
monitoring
applications.
Nitric
oxide
(NO)
is
a
harmful
gas
that
produced
combustion
processes
associated
with
air
pollution
respiratory
diseases.
Zinc
gallate
(ZnGa2O4)
has
shown
promising
results
as
material
for
NO
sensing
Previously,
the
performance
of
based
on
ZnGa2O4
epilayers
was
not
substantial.
However,
there
potential
further
improvement
by
optimizing
their
surface
properties.
Plasma
treatment
been
widely
utilized
to
modify
characteristics
materials,
including
semiconductors,
We
have
investigated
impact
plasma
metal-organic
chemical
vapor
deposition
grown
this
work.
An
inductive
coupled
reactive
ion
etching
used
apply
Ar
successfully
optimize
response
sensor
gas.
The
ZnGa2O4-based
159.5%,
which
enhanced
8
times
reached
1276.1%
under
5
ppm
concentration
after
10
min
treatment.
limit
detection
found
be
2.4
ppb.
These
demonstrate
significantly
improved
sensor's
response.
cross-selectivity
tested
among
NO,
CO2,
CO,
SO2
gases,
indicated
possess
highly
selectivity
towards
This
study
provides
valuable
insights
into
modification
techniques
enhancing
sensors,
can
significant
development
advanced
technologies
Nanomaterials,
Год журнала:
2023,
Номер
13(18), С. 2510 - 2510
Опубликована: Сен. 7, 2023
In
this
work,
the
adsorption
and
sensing
behavior
of
Ag-doped
MoSe2/ZnO
heterojunctions
for
H2,
CH4,
CO2,
NO,
CO,
C2H4
have
been
studied
based
on
density
functional
theory
(DFT).
gas
analysis,
energy,
distance,
transfer
charge,
total
electron
density,
states
(DOS),
energy
band
structure,
frontier
molecular
orbital,
work
function
(WF)
each
has
calculated.
Furthermore,
reusability
stability
also
studied.
The
results
showed
that
great
potential
to
be
a
candidate
highly
selective
responsive
sensors
NO
detection
with
excellent
stability.
