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.
