Inorganic Chemistry,
Journal Year:
2023,
Volume and Issue:
62(17), P. 6843 - 6850
Published: April 20, 2023
Layered
double
hydroxide
(LDH)-based
photocatalysts
have
attracted
more
attention
in
photocatalysis
due
to
their
low
cost,
wide
band
gaps,
and
adjustable
photocatalytic
active
sites;
however,
photogenerated
carrier
separation
efficiency
limits
efficiency.
Herein,
a
NiAl-LDH/Ni-doped
Zn0.5Cd0.5S
(LDH/Ni-ZCS)
S-scheme
heterojunction
is
rationally
designed
constructed
from
kinetically
thermodynamically
favorable
angles.
The
15%
LDH/1%
Ni-ZCS
displays
comparable
hydrogen
evolution
(PHE)
activity
with
rate
of
6584.0
μmol
g-1
h-1,
which
exceeds
by
∼6.14-
∼1.73-fold
those
ZCS
1%
Ni-ZCS,
respectively,
outperforms
most
the
previously
reported
LDH-based
metal
sulfide-based
photocatalysts.
In
addition,
apparent
quantum
yield
reaches
12.1%
at
420
nm.
situ
X-ray
photoelectron
spectroscopy,
photodeposition,
theoretical
calculation
reveal
specific
transfer
path
carriers.
On
this
basis,
we
propose
possible
mechanism.
fabrication
not
only
accelerates
carriers
but
also
decreases
activation
energy
H2
improves
redox
capacity.
Moreover,
there
are
huge
amounts
hydroxyl
groups
distributed
on
surface
photocatalysts,
highly
polar
easy
combine
H2O
large
dielectric
constant
form
bond,
can
further
accelerate
PHE.
RSC Applied Interfaces,
Journal Year:
2023,
Volume and Issue:
1(1), P. 43 - 69
Published: Sept. 27, 2023
Semiconductor
heterojunctions
are
pivotal
in
determining
the
overall
photocatalytic
efficiency.
This
review
explores
recent
advances
diverse
heterojunction
types,
charge
transfer
mechanisms
and
materials.
ACS Catalysis,
Journal Year:
2023,
Volume and Issue:
13(10), P. 6619 - 6629
Published: April 28, 2023
Photocatalytic
regeneration
of
a
nicotinamide
cofactor,
adenine
dinucleotide
phosphate
(NADPH),
has
emerged
as
an
ideal
cascade
partner
for
combination
with
enzymatic
transformations,
but
it
still
suffers
from
low
efficiency
due
to
the
recombination
photogenerated
charge
carriers.
Herein,
hierarchical
Rh-covalent
organic
framework
(COF)@COF
core–shell
hollow
sphere
(CSHS)
S-scheme
heterojunction
is
proposed
enhance
carrier
transfer
and
utilization
in
photocatalysis
regenerate
expensive
NADPH.
The
Rh-COFBpy@
spherical
COF
(HCOF)
CSHS
was
prepared
by
simple
sequential
situ
growth.
turnover
frequency
Rh-COFBpy@HCOF25
NADPH
reached
2.6
mmol·gRh-COF–1·h–1,
which
3.7
times
that
pure
Rh-COFBpy
under
visible
light.
Density
functional
theory
calculation
X-ray
photoelectron
spectroscopy
analysis
showed
internal
electric
field
directed
HCOF
formed
Rh-COFBpy@HCOF
CSHS,
accelerated
electron
Rh-COFBpy.
In
irradiated
XPS
analyses
photoirradiated
Kelvin
probe
measurement
revealed
charge-transfer
mechanism
within
Rh-COFBpy@HCOF.
photocatalytic
system
further
coupled
reduction
C═C,
achieving
photoenzyme
reaction.
This
work
provides
protocol
design
COF-based
artificial
photosynthetic
systems.
