Journal of the American Ceramic Society,
Год журнала:
2024,
Номер
107(9), С. 5695 - 5719
Опубликована: Май 27, 2024
Abstract
Semiconductor
photocatalysis
has
been
extensively
used
in
the
degradation
of
pollutants
and
production
hydrogen
fuel.
The
main
drawback
application
semiconductor
is
rapid
recombination
charge
carriers.
Several
strategies
have
applied
to
improve
carrier
separation
preserve
them
for
imparting
photocatalytic
reactions.
Among
modifications
that
are
made
systems,
construction
different
types
heterostructures,
including
type
II,
Z‐scheme,
p–n
junction,
Schottky
received
great
attention.
Recently,
emerging
S‐scheme
heterojunctions
shown
be
able
powerful
carriers
reactions,
which
not
case
other
heterostructures.
In
this
review,
principles
mechanisms
transfer
heterostructures
discussed,
important
semiconductors
reviewed.
Methods
identification
heterojunction,
challenges,
prospects
addressed.
Abstract
Metal
sulfide‐based
homojunction
photocatalysts
are
extensively
explored
with
improved
photocatalytic
performance.
However,
the
construction
of
metal
S‐scheme
remains
a
challenge.
Herein,
fabrication
2D
CdIn
2
S
4
nanosheets
coated
3D
octahedra
(referred
to
as
2D/3D
n‐CIS/o‐CIS)
photocatalyst
is
reported
by
simply
adjustment
polyvinyl
pyrrolidone
amount
during
solvothermal
synthesis.
The
formation
within
n‐CIS/o‐CIS
systematically
investigated
via
series
characterizations,
which
can
generate
an
internal
electric
field
facilitate
separation
and
migration
photogenerated
electron‐hole
pairs.
composite
exhibits
significantly
activity
stability
in
selective
oxidation
phenylcarbinol
(PhCH
OH)
benzaldehyde
(PhCHO)
when
compared
pure
n‐CIS
o‐CIS
samples
under
visible
light
irradiation.
It
hoped
that
this
work
contribute
novel
insights
into
development
sulfides
for
solar
energy
conversion.
Advanced Materials,
Год журнала:
2024,
Номер
36(32)
Опубликована: Июнь 4, 2024
Abstract
Solar
fuel
synthesis
is
intriguing
because
solar
energy
abundant
and
this
method
compensates
for
its
intermittency.
However,
most
photocatalysts
can
only
absorb
UV‐to‐visible
light,
while
near‐infrared
(NIR)
light
remains
unexploited.
Surprisingly,
the
charge
transfer
between
ZnO
CuInS
2
quantum
dots
(QDs)
transform
a
NIR‐inactive
into
NIR‐active
composite.
This
strong
response
attributed
to
increased
concentration
of
free
carriers
in
p‐type
semiconductor
at
interface
after
migration
,
enhancing
localized
surface
plasmon
resonance
(LSPR)
effect
NIR
.
As
paradigm,
ZnO/CuInS
heterojunction
used
H
O
production
coupled
with
glycerin
oxidation
demonstrates
supreme
performance,
corroborating
importance
efficient
transfer.
Mechanistic
studies
through
contact
potential
difference
(CPD),
Hall
test,
finite
element
(FEM)
calculation
allow
direct
correlation
approach
bypasses
general
issues,
thereby
stepping
forward
ambitious
goal
harnessing
entire
spectrum.
Abstract
Owing
to
the
improved
charge
separation
and
maximized
redox
capability
of
system,
Step‐scheme
(S‐scheme)
heterojunctions
have
garnered
significant
research
attention
for
efficient
photocatalysis
H
2
evolution.
In
this
work,
an
innovative
linear
donor–acceptor
(D–A)
conjugated
polymer
fluorene‐alt‐(benzo‐thiophene‐dione)
(PFBTD)
is
coupled
with
CdS
nanosheets,
forming
organic–inorganic
S‐scheme
heterojunction.
The
CdS/PFBTD
(CP)
composite
exhibits
impressed
hydrogen
production
rate
7.62
mmol
g
−1
h
without
any
co‐catalysts,
which
≈14
times
higher
than
pristine
CdS.
It
revealed
that
outstanding
photocatalytic
performance
attributed
formation
rapid
electron
transfer
channels
through
interfacial
Cd─O
bonding
as
evidenced
by
density
functional
theory
(DFT)
calculations
in
situ
X‐ray
photoelectron
spectroscopy
(XPS)
analysis.
mechanism
involved
further
investigated
photo‐irradiated
Kelvin
probe
force
microscopy
(KPFM)
This
work
provides
a
new
point
view
on
points
out
direction
designing
superior
heterojunction
photocatalysts.
