ACS Applied Electronic Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Авг. 4, 2024
Two-dimensional
nanomaterials
have
garnered
recent
interest
among
scientists
in
gas
sensing
applications.
MXene
(Ti3C2Tx)
[MX]
is
one
of
the
top
priorities
researchers
owing
to
its
numerous
advantages
like
abundant
surface-active
sites,
large
surface
area,
and
high
conductivity.
Designing
a
room
temperature
sensor
has
become
indispensable
era
environmental
industrial
monitoring.
Heterojunction
creation
helps
band
alignment
by
transfer
charge
at
junction,
which
further
better
performance
enhanced
response.
In
this
work,
SrTiO3
(STO)
perovskite-MX-based
nanocomposite
been
developed
using
simple
electrostatic
self-assembly
technique
combining
spherically
shaped
STO
on
2D
layered
MX
sheet.
The
fabricated
exhibits
good
selectivity,
sensitivity,
long-term
stability
toward
NO2
detection
27
°C.
response
recorded
for
STO-MX
composite
was
38.79%
50
ppm
gas,
triple
five
times
higher
than
pristine
with
an
exceptional
recovery
time
8
12s.
Also,
study
demonstrates
outstanding
linearity
9-fold
increase
from
1
30
reproducibility.
LOD
(limit
detection)
achieved
material
lower,
that
is,
300
ppb.
This
work
unveils
utility
perovskite
based
as
efficient
strategy
toxic
gas.
An
effective
long-term
nitrogen
dioxide
(NO2)
monitoring
at
trace
concentration
is
critical
for
protecting
the
ecological
environment
and
public
health.
Tellurium
(Te),
as
a
recently
discovered
2D
elemental
material,
promising
NO2
detection
because
of
its
suitable
band
structure
gas
adsorption
charge
mobility.
However,
high
activity
Te
leads
to
poor
stability
in
ambient
harsh
conditions,
limiting
application
gas-sensitive
material.
Herein,
single-elemental
Te@Se
heterostructures
with
core-shell
are
prepared
using
solvothermal
method.
The
demonstrate
an
extremely
response
622%
1
ppm
room
temperature,
ultrafast
response/recovery
times
10
s/30
s.
Moreover,
exhibit
excellent
sensing
performance
over
period
90
days.
success
relies
on
ultrathin
Se
shell
thickness
4-6
nm
Te,
which
enables
efficient
redistribution
transport
interfacial
charges.
These
findings
reveal
potential
single-element
heterojunctions
achieve
high-performance
sensing,
paving
way
advancements
materials.
