Small,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 23, 2024
Abstract
The
rational
design
of
S‐scheme
photocatalysts,
achieved
by
serially
integrating
two
different
semiconductors,
represents
a
promising
strategy
for
efficient
charge
separation
and
amplified
photocatalytic
performance,
yet
it
remains
challenge.
Herein,
ZnIn
2
S
4
(ZIS)
oxygen‐doped
(O‐ZIS)
nanosheets
are
chosen
to
construct
homojunction
catalyst
architecture.
Theoretical
simulations
alongside
comprehensive
in
situ
ex
characterizations
confirm
that
ZIS
O‐ZIS
with
noncentrosymmetric
layered
structures
can
generate
polarization‐induced
bulk‐internal
electric
field
(IEF)
within
the
crystal.
A
robust
interface‐IEF
is
also
created
strong
interfacial
interaction
between
work
functions.
Owing
these
features,
O‐ZIS/ZIS
adopts
an
directional
transfer
route,
wherein
photoexcited
electrons
holes
concurrently
migrate
their
interface
subsequently
recombine.
This
enables
spatial
provides
high
driving
force
both
reduction
oxidation
reactions
simultaneously.
Consequently,
such
photocatalyst
exhibits
H
evolution
rate
up
142.9
µmol
h
−1
without
any
cocatalysts,
which
4.6‐
3.4‐fold
higher
than
pristine
O‐ZIS,
respectively.
Benzaldehyde
produced
as
value‐added
product
146.9
.
offers
new
perspective
on
systems.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(38)
Published: May 11, 2024
Abstract
Emerging
step‐scheme
(S‐scheme)
heterostructures
hold
unique
superiority
in
steering
directional
charge
transport
and
reinforcing
redox
capacity,
yet
rational
modification
of
S‐scheme
by
single
atoms
(SAs)
for
efficient
photocatalytic
H
2
evolution
is
rarely
reported.
In
this
work,
Pd
SAs‐modulated
organic–inorganic
g‐C
3
N
4
/CdS
are
designed
prepared
a
one‐pot
mechanochemical
approach
allowing
nanosheets/CdS
nanoparticles
to
confine
atomically
dispersed
co‐catalysts.
The
charge‐transfer
pathway
corroborated
combination
situ
irradiated
X‐ray
photoelectron
spectroscopy,
electron
paramagnetic
resonance,
Kelvin
probe
force
microscopy.
Density
functional
theory
(DFT)
calculations,
high‐angle
annular
dark‐field
scanning
transmission
microscopy,
absorption
fine
structure
identify
Pd‐S
Pd‐N
atomic
moieties
underpinned
the
electronic
interaction
between
SAs
heterostructures,
which
d
‐band
center
optimized
proton
adsorption
thermodynamically.
Further,
alongside
concert
boost
rapid
migration
photogenerated
electrons
(1.05
ps)
via
Pd─S
Pd─N
bond‐derived
channels.
A
maximal
rate
85.66
mmol
h
−1
g
achieved
1
wt%
Pd‐20
hierarchical
composites.
This
work
may
guide
design
high‐efficiency
S‐scheme‐based
photocatalysts
solar‐to‐H
conversion
beyond.
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 7, 2025
Abstract
The
S‐scheme
heterojunction
exerts
a
profoundly
positive
influence
on
enhancing
carrier
separation
efficiency
and
redox
capability.
However,
there
are
few
reports
accelerating
the
reaction
rate
of
photogenerated
charge
carriers,
particularly
consumption
holes
in
heterojunction.
Herein,
an
situ
construction
strategy
is
employed
to
construct
ultra‐small
nonprecious
metal
NiO
(≈2
nm)
By
incorporating
into
heterojunctions,
photocatalytic
hydrogen
production
performance
significantly
improved
by
380
times,
nitrogen
fixation
enhanced
20
times.
Density
function
theoretical
(DFT)
calculations,
X‐ray
photoelectron
spectroscopy
(in
XPS),
Diffuse
Reflectance
Infrared
Fourier
Transform
Spectroscopy
DRIFTS)
characterization
results
indicate
that
incorporation
heterojunctions
can
not
only
enhance
photo‐generated
carriers
ability
but
also
further
promote
sacrificial
agents,
thereby
achieving
secondary
enhancement
efficiency.
Therefore,
(H
2
)
(N
markedly
improved.
successful
execution
this
work
provides
novel
approach
material
structure
design,
offering
valuable
insights
for
development
improvement
high‐performance
materials.
The
photocatalytic
hydrolysis
method
represents
a
significant
potential
solution
to
the
dual
challenges
of
energy
security
and
environmental
sustainability.
selection
suitable
materials
systems
is
paramount
importance
for
successful
implementation
hydrogen
production
technology.
In
this
study,
in
situ
reduction
Co
nanoparticles
on
MnO
was
successfully
performed
by
calcining
MnCo-PBA.
Furthermore,
graphdiyne
(GDY)
introduced
physical
agitation.
introduction
GDY
reduced
Co/MnO
agglomeration
made
Co/MnO/GDY
catalyst
exhibit
high
activity
production,
with
an
optimum
rate
2117.33
μmol·g-1·h-1,
which
4.88
2.67
times
higher
than
that
Co/MnO,
respectively.
results
photoelectrochemical
test
indicate
composite
has
better
photogenerated
carrier
separation
efficiency.
X-ray
photoelectron
spectroscopy,
density
functional
theory
calculations,
electron
paramagnetic
resonance
were
used
investigate
transfer
mechanism
during
process,
confirming
presence
S-scheme
heterojunction
ohmic
junction,
enhance
carriers.
GDY-based
constructed
study
significantly
bimetallic
catalysts.
