ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(22), С. 28928 - 28937
Опубликована: Май 25, 2024
Two-dimensional
(2D)
mesoporous
transition
metal
oxides
are
highly
desired
in
various
applications,
but
their
fast
and
low-cost
synthesis
remains
a
great
challenge.
Herein,
Maillard
reaction
inspired
microexplosion
approach
is
applied
to
rapidly
synthesize
ultrathin
2D
tin
oxide
(mSnO2).
During
the
between
granular
ammonia
nitrate
with
melanoidin
at
high
temperature,
organic
species
can
be
carbonized
expanded
due
instantaneous
release
of
gases,
thus
producing
carbonaceous
templates
rich
functional
groups
effectively
anchor
SnO2
nanoparticles
on
surface.
The
subsequent
removal
via
calcination
air
results
formation
mSnO2
confinement
effect
templates.
Pd
controllably
deposited
surface
situ
reduction,
forming
Pd/mSnO2
nanocomposites
thicknesses
6–8
nm.
Owing
unique
structure
oxygen
defects
exposed
metal–metal
interfaces,
exhibits
excellent
sensing
performance
toward
acetone
sensitivity,
short
response
time,
good
selectivity
under
low
working
temperature
(100
°C).
This
convenient
strategy
opens
up
possibility
constructing
porous
materials
for
applications
including
high-performance
gas
sensors.
Developing
a
sensitive
n-butanol
gas
sensor
with
low
detection
limits
is
crucial
because
of
the
environmental
and
health
risks
that
pose
in
high
concentrations.
Metal-oxide
semiconductor
sensors
are
favoured
for
their
sensitivity,
selectivity,
rapid
response,
reliability,
cost-effectiveness.
However,
many
lack
responses
or
fast
recovery
times
complex
to
prepare,
often
resulting
inconsistent
film
thicknesses
reduced
sensing
performances.
In
this
study,
based
on
Au@In2O3
hollow-sphere
array
thin
films
prepared
using
template-assisted
magnetron
sputtering
detect
n-butanol.
The
characterisation
methods
include
X-ray
diffraction,
scanning
electron
microscopy,
transmission
high-resolution
elemental
distributions
films.
results
indicate
gas-sensitive
consist
monolayers
highly
ordered
hollow
microspheres.
best
performance
achieved
when
thickness
In2O3
60
nm
time
Au
particles
10
s.
Furthermore,
exhibits
an
exceptionally
response
at
concentration
100
ppm
325
°C
(Ra/Rg
=
1054),
short
response/recovery
(8
s/15
s),
limit
3.8,
50
ppb),
selectivity
repeatability.
remarkable
proposed
can
be
mainly
attributed
large
specific
surface
areas
catalytic
spillover
effect
Au,
as
well
presence
heterojunctions,
change
charge
state.
This
study
provides
new
method
rational
design
high-performance
sensors.
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(22), С. 28928 - 28937
Опубликована: Май 25, 2024
Two-dimensional
(2D)
mesoporous
transition
metal
oxides
are
highly
desired
in
various
applications,
but
their
fast
and
low-cost
synthesis
remains
a
great
challenge.
Herein,
Maillard
reaction
inspired
microexplosion
approach
is
applied
to
rapidly
synthesize
ultrathin
2D
tin
oxide
(mSnO2).
During
the
between
granular
ammonia
nitrate
with
melanoidin
at
high
temperature,
organic
species
can
be
carbonized
expanded
due
instantaneous
release
of
gases,
thus
producing
carbonaceous
templates
rich
functional
groups
effectively
anchor
SnO2
nanoparticles
on
surface.
The
subsequent
removal
via
calcination
air
results
formation
mSnO2
confinement
effect
templates.
Pd
controllably
deposited
surface
situ
reduction,
forming
Pd/mSnO2
nanocomposites
thicknesses
6–8
nm.
Owing
unique
structure
oxygen
defects
exposed
metal–metal
interfaces,
exhibits
excellent
sensing
performance
toward
acetone
sensitivity,
short
response
time,
good
selectivity
under
low
working
temperature
(100
°C).
This
convenient
strategy
opens
up
possibility
constructing
porous
materials
for
applications
including
high-performance
gas
sensors.
