Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 15, 2025
Abstract
The
photocatalytic
reduction
of
CO
2
in
water
to
produce
fuels
and
chemicals
is
promising
while
challenging.
However,
many
photocatalysts
for
accomplishing
such
challenging
task
usually
suffer
from
unspecific
catalytic
active
sites
the
inefficient
charge
carrier's
separation.
Here,
a
site‐specific
single‐atom
Ni/TiO
2−x
catalyst
reported
by
situ
topological
transformation
Ni‐Ti‐EG
bimetallic
metal–organic
frameworks.
loading
nickel
nanoparticles
or
individual
atoms,
which
act
as
specific
sites,
can
be
precisely
regulated
chelating
agents
through
partial
removal
adjacent
oxygen
atoms.
Furthermore,
degree
lattice
strain
catalysts,
improves
separation
efficiency
carriers,
modulated
fine‐tuning
process.
By
leveraging
anchored
atoms
strained
TiO
,
optimized
Ni
SA0.27
/TiO
shows
generation
rate
86.3
µmol
g
−1
h
(288
times
higher
than
that
NPs
)
selectivity
up
92.5%
pure‐water
system.
This
work
underscores
importance
tailoring
creating
facilitate
efficient
selective
.
Journal of Materiomics,
Journal Year:
2024,
Volume and Issue:
11(3), P. 100918 - 100918
Published: July 27, 2024
The
construction
of
heterojunction
is
an
effective
way
to
promote
the
photoinduced
charge
carrier
separation
in
spatial,
thus
accelerating
photocatalytic
reaction.
However,
regulation
interface
properties,
as
a
crucial
factor
affecting
diffusion
process,
still
remains
significant
challenge.
In
this
work,
BiOBr/TpBD-COF
was
successfully
constructed
via
novel
phase
transformation
strategy.
Specifically,
perovskite
Cs3Bi2Br9
first
synthesized
and
then
in-situ
transformed
into
BiOBr
during
preparation
TpBD-COF
procedure,
obtaining
with
favorable
interface.
According
X-ray
photoelectron
spectroscopy
(XPS)
characterization
electron
paramagnetic
resonance
(EPR)
analysis,
photogenerated
electrons
weak
reduction
power
transfer
from
driven
by
internal
electric
field
under
irradiation,
conforming
S-scheme
mode.
As
result,
holes
strong
redox
abilities
are
spatially
located
on
surface,
respectively,
endowing
driving
force
toward
water
splitting
optimized
10%BiOBr/TpBD-COF
displayed
remarkably
enhanced
hydrogen
evolution
rate
(16.17
mmol·g−1·h−1)
comparison
(5.18
mmol·g−1·h−1).
This
study
will
provide
some
inspirations
for
developing
efficient
COF-based
photocatalysts.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 9, 2024
Abstract
The
global
energy
crisis
and
environmental
concerns
are
driving
research
into
renewable
sustainable
conversion
storage
technologies.
Solar
energy,
as
an
ideal
resource,
has
significant
potential
to
contribute
the
goal
of
net‐zero
carbon
emissions
if
effectively
harnessed
converted
a
reliable
storable
form
energy.
Photocatalysts
have
convert
sunlight
chemical
carriers.
In
this
respect,
covalent
organic
frameworks
(COFs)
shown
great
promise
due
their
tunable
structure
on
different
length
scales,
high
surface
areas,
beneficial
optical
properties
such
broad
visible
light
absorption.
This
review
offers
comprehensive
overview
key
developments
in
COF‐based
photocatalysts
for
various
applications,
including
water
splitting,
hydrogen
peroxide
generation,
transformations,
dioxide
nitrogen
reduction.
underlying
mechanisms,
essential
principles
material
design,
structure‐function
relationships
COFs
photocatalytic
applications
discussed.
challenges
faced
by
also
summarized
strategies
enhance
performance
explained,
improving
crystallinity,
regulating
molecular
structures,
tailoring
linkages,
incorporating
cocatalysts.
Finally,
critical
proposed
utilization
photocatalytically
generated
chemicals
value‐added
products.
RSC Advances,
Journal Year:
2024,
Volume and Issue:
14(41), P. 29763 - 29773
Published: Jan. 1, 2024
Doped
semiconductor
heterostructures
have
superior
properties
compared
to
their
components.
In
this
study,
we
observed
the
synthesis
of
Cu-doped
ZnO/Ag/CuO
heterostructure
with
presence
charge
transfer
and
visible
light-harvesting
resulting
from
doping
heterojunction.
The
porous
were
prepared
using
bottom-up
combustion
(BUC)
approach.
This
method
generated
by
eliminating
gaseous
by-products.
X-ray
diffraction
(XRD)
optimization
revealed
that
ideal
conditions
included
1.00
g
polyvinyl
alcohol
(PVA),
a
temperature
50
°C,
1
hour
calcination
time.
Introducing
copper
(Cu)
into
zinc
oxide
(ZnO)
lattice
caused
high-angle
shift
in
XRD
pattern
peaks.
High-resolution
transmission
electron
microscopy
(HRTEM)
images
patterns
confirmed
formation
(c-zac)
heterostructures.
Elemental
mapping
analysis
even
surface
distribution
Ag
metal.
c-zac
exhibited
optoelectrical
single
ZnO.
demonstrated
improved
methylene
blue
(MB)
dye
degradation
potential
(
