Self-assembled
nanomaterials
have
aroused
enormous
interest
owing
to
their
enhanced
physicochemical
properties
as
compared
monomers.
Herein,
two-dimensional
Nd-based
polyoxometalate
clusterphene
(Nd-POMCene)
with
a
highly
ordered
honeycomb
structure
is
synthesized
by
self-assembly,
which
demonstrated
efficient
photocatalytic
degradation
performance
towards
organic
dyes,
such
Rhodamine
B
(RhB),
methylene
blue,
and
crystal
violet.
Especially,
RhB
can
be
totally
photodegraded
Nd-POMCene
under
the
simulated
sunlight
within
1
h
while
degraded
efficiency
of
97.50
%
achieved
natural
light
2
h.
As
proved
density
functional
theory
results,
POMCene
beneficial
for
enhancing
associated
improved
separation/transmission
photogenerated
electron/hole
pairs
large-scale
electron
delocalization.
The
mechanism
study
provides
compelling
evidence
demonstrate
that
all
holes,
hydroxyl
radicals,
superoxide
radicals
chemically
account
photodegradation
Nd-POMCene.
Finally,
it
verified
there
much
less
toxicity
in
products
RhB.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Июнь 20, 2024
Abstract
The
piezoelectric
effect
is
employed
to
enhance
the
photocatalytic
process
by
enabling
efficient
utilization
of
photogenerated
electrons
and
holes.
In
this
study,
a
defect‐engineered
Na–Sm
bimetal‐regulated
layered
ferroelectric
material,
SrBi
2
Nb
O
9
,
synthesized
using
molten
salt
process,
exhibits
excellent
piezo‐photocatalytic
performance
in
synergistic
removal
uranium
[U(VI)]
tetracycline
(TC)
from
wastewater.
incorporation
Sm
dopant
creates
an
intermediate
band
structure,
while
Na
doping
introduces
empty
orbitals
into
conduction
band,
thereby
enhancing
electrical
conductivity,
improving
electron
mobility,
supplying
sufficient
promote
catalytic
reactions.
Moreover,
induces
additional
internal
electric
field,
which
combines
embedded
field
along
b
‐axis
with
polarization
‐axis.
This
combined
enhances
anisotropic
migration
holes,
facilitating
their
spatial
separation.
doped
can
simultaneously
remove
98%
U(VI)
degrade
99%
TC.
Furthermore,
enhancement
observed
between
reduction
TC
oxidation
reactions,
rate
constant
being
1.2
times
higher
than
that
individual
system.
work
presents
innovative
strategy
for
designing
catalysts
able
pollutants
optimize
redox
