ACS Applied Materials & Interfaces,
Journal Year:
2022,
Volume and Issue:
14(9), P. 11375 - 11387
Published: Feb. 22, 2022
Point
defects
in
piezoelectric
semiconductors
play
a
significant
role
regulating
the
piezocatalytic
performance.
However,
of
metal
vacancies
piezocatalysis
has
been
less
explored
than
that
oxygen
vacancies.
Herein,
Bi2WO6
(BWO)
nanosheets
with
tunable
Bi
were
synthesized
using
an
ion
exchange
method.
High-resolution
transmission
electron
microscopy
directly
revealed
existence
lattice
BWO
and
precipitation
quasiparticles.
The
highest
concentration
exhibited
excellent
decomposition
efficiency
(7.83
×
10-2
min-1)
over
rhodamine
B
under
ultrasound.
phenomenon
is
mainly
attributed
to
increased
charge
carrier
as
consequence
defect
energy
levels.
In
addition,
enhancement
light
absorption
capacity
caused
by
surface
plasmon
resonance
effect
quasiparticles
indicates
ions
escape
from
combine
free
electrons
around
form
quantum
dots,
which
function
traps
facilitate
separation
carriers
during
process.
This
work
systematically
reveals
essential
affiliation
clusters
piezocatalysts
verifies
significance
vacancy
engineering
application.
Angewandte Chemie International Edition,
Journal Year:
2022,
Volume and Issue:
62(5)
Published: Nov. 1, 2022
Abstract
As
a
consequence
of
rapid
industrialization
throughout
the
world,
various
environmental
pollutants
have
begun
to
accumulate
in
water,
air,
and
soil.
This
endangers
ecological
environment
earth,
remediation
has
become
an
immediate
priority.
Among
techniques,
piezocatalytic
which
uniquely
take
advantage
piezoelectric
effect,
attracted
much
attention.
Piezoelectric
effects
allow
pollutant
degradation
directly,
while
also
enhancing
photocatalysis
by
reducing
recombination
photogenerated
carriers.
In
this
Review,
we
provide
comprehensive
summary
recent
developments
techniques
for
remediation.
The
origin
effect
as
well
classification
materials
their
application
are
systematically
summarized.
We
analyze
potential
underlying
mechanisms.
Finally,
urgent
problems
future
development
discussed.
Advanced Functional Materials,
Journal Year:
2022,
Volume and Issue:
32(35)
Published: June 23, 2022
Abstract
Piezocatalysis
has
gradually
come
into
the
limelight
due
to
its
great
potential
for
solving
energy
shortages
and
environmental
pollution
problems.
However,
limited
piezocatalytic
efficiency
is
a
severe
bottleneck
practical
applications.
Here,
well‐defined
BaTiO
3
nanosheets
with
highly
exposed
{001}
polar
facets
are
successfully
synthesized
enhance
activity.
The
[001]
piezoelectric
polarization
can
drive
carriers
migrate
surface
along
out‐of‐plane
direction.
provides
abundant
active
sites
reaction.
As
result,
superior
degradation
ratio
of
organic
pollutants
obtained
high
first‐order
rate
constant
k
0.0835
min
−1
,
which
2.7
times
higher
than
nanoparticles.
Furthermore,
display
an
outstanding
H
2
production
capability,
305
µmol
g
h
–1
almost
two
that
This
work
thus
novel
comprehensive
strategy
designing
high‐performance
piezocatalysts
polarization,
also
insights
optimization
activity
by
regulating
facet
piezocatalysts.
