ACS Nano,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 14, 2025
Quadruple
perovskite
oxides
have
received
extensive
attention
in
electronics
and
catalysis,
owing
to
their
cation-ordering
structure
intriguing
physical
properties.
However,
repertoires
still
remain
limited.
In
particular,
piezoelectricity
from
quadruple
perovskites
has
been
rarely
reported
due
the
frustrated
symmetry-breaking
transition
A-site-ordered
structures,
disabling
piezoelectric
applications.
Herein,
we
report
a
feasible
strategy
achieve
CaCu3Ti4O12
(CCTO)
via
cation
defect
engineering,
specifically
through
thermal-driven
selective
exsolution
introduce
Cu
vacancies.
The
introduction
of
point
defects
CCTO
locally
destabilizes
constrained
tilted
TiO6
octahedra
framework,
relaxing
octahedral
tilting
inducing
structural
heterogeneity
which,
turn,
disrupts
high
symmetry
pristine
cubic
phase.
As
result,
defective
with
localized
asymmetry
exhibits
intense
polarization
robust
7
pC
N-1.
created
is
further
validated
by
its
application
as
piezo-photocatalyst,
enabling
efficient
charge
separation
transfer
2.5-times
increment
lifetime
photoexcitations.
This
enhancement
leads
3.86-
31-fold
increase
production
hydrogen
peroxide
reactive
oxygen
species
compared
individual
piezocatalysis
photocatalysis,
respectively.
study
establishes
pathway
engineer
perovskites,
potentially
unlocking
wide
range
applications
modern
microelectronics
beyond
demonstrated
piezo-photocatalysis.
Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 19, 2025
Abstract
Heterojunctions
are
sustainable
solutions
for
the
photocatalytic
CO
2
reduction
reaction
(CO
RR)
by
regulating
charge
separation
behavior
at
interface.
However,
their
efficiency
and
product
selectivity
severely
hindered
inflexible
weak
built‐in
electric
field
electronic
structure
of
two
phases.
Herein,
ferroelectric‐based
heterojunctions
between
polarized
bismuth
ferrite
(BFO(P))
CdS
constructed
to
enhance
interfacial
interactions
catalytic
activity.
The
intrinsic
polarization
depending
on
ferroelectric
state
causes
significant
electrostatic
potential
difference
energy‐band
bending.
This
helps
overcome
unsatisfactory
redox
that
differs
from
classical
mechanism,
synergy
heterostructure
facilitates
effective
transfer
photogenerated
charges
with
an
extended
lifetime
(>20
ns)
significantly
enhanced
photovoltage
(1002
times
BFO).
optimized
carrier
dynamics
allow
heterojunction
achieve
a
much
higher
yield
compared
state‐of‐the‐art
photocatalysts,
85.46
23.47
than
those
pristine
BFO,
respectively.
Moreover,
it
maintains
impressive
100%
together
excellent
repeatability
cycling.
work
not
only
sheds
light
how
strong
inherent
polarity
promotes
performance
photocatalysts
but
also
provides
new
insights
designing
efficient
RR.
ChemCatChem,
Journal Year:
2023,
Volume and Issue:
15(18)
Published: July 6, 2023
Abstract
MXene
has
indeed
gained
significant
attention
in
recent
years
as
a
promising
photocatalyst
for
various
applications,
including
photocatalytic
degradation
of
pollutants.
possesses
several
unique
physical
and
chemical
properties
that
make
it
suitable
such
its
uniform
planar
structure,
strong
metal
conductivity,
effective
functional
groups,
numerous
derivatives.
These
contribute
to
the
excellent
photodegradation
performance
long‐term
stability
exhibited
by
MXene‐based
photocatalysts
compared
other
photocatalysts.
composites,
which
are
formed
incorporating
with
materials,
demonstrate
even
better
activity
due
their
abundant
active
sites
porous
structure.
One
crucial
factor
influencing
is
presence
groups
on
surface
MXene.
play
role
process
overall
efficiency
catalyst.
To
provide
broader
understanding
photocatalysts,
physicochemical
briefly
described
this
review.
This
includes
structural
characteristics,
electrical
groups.
review
also
investigates
synthesis
routes
preparing
MXene,
both
natural
state
composites
materials.
methods
essential
tailoring
meet
specific
requirements.
Finally,
discusses
future
work
challenges
photocatalysis.
field
holds
great
promise
addressing
environmental
concerns
improving
organic
compounds.
However,
further
research
needed
optimize
methods,
enhance
efficiency,
explore
practical
applications
Small,
Journal Year:
2024,
Volume and Issue:
20(20)
Published: Jan. 25, 2024
Abstract
Piezo‐catalysis
emerges
as
an
efficient,
safe,
and
affordable
strategy
for
removing
hazardous
substances
from
aquatic
environments.
Here,
the
BiFeO
3
@In
2
Se
heterojunction
demonstrates
remarkable
prowess
a
piezo‐catalyst,
enabling
high‐efficiency
removal
of
uranium
(U)
U(VI)‐containing
water.
A
total
U(VI)
efficiency
94.6%
can
be
achieved
under
ultrasonic
vibration
without
any
sacrificial
agents.
During
entire
catalytic
process,
piezo‐induced
electrons,
hydroxyl
radicals,
superoxide
radicals
play
important
roles
in
removal,
while
generated
H
O
is
responsive
to
transformation
soluble
into
insoluble
(UO
)O
•2H
UO
.
Furthermore,
auxiliary
illumination
accelerate
increase
free
charges,
piezo‐catalyst
retain
more
charges.
This
leads
improved
98.8%
significantly
increased
reaction
rate
constant.
study
offers
comprehensive
analysis
fabrication
piezo‐catalysts
or
extraction
