Photocatalytic
hydrogen
production
technology
has
become
one
of
the
most
promising
technologies
to
solve
future
energy
crisis.
However,
photocatalytic
materials
have
problems
such
as
weak
catalytic
activity
and
low
efficiency.
To
address
this
problem,
we
devised
a
strategy
synthesize
alloy/terpolymer
sulfides
composite,
which
can
effectively
improve
electron-hole
separation
rate
In
study,
new
type
cocatalyst
N-doped
graphite
carbon
layer
coated
FeCo
alloy
(FC@NGC)
nanoparticles
loaded
on
tetrapod
Cd0.9Zn0.1S
(CZS)
surface
was
synthesized
by
simple
ultrasonic
self-assembly
method
combined
calcination.
Due
efficient
transfer
photoelectrons
FC@NGC
nanoparticles,
pairs
be
separated
effectively,
thus
improving
activity.
FeCo@NGC/Cd0.9Zn0.1S
(FC@NGC/CZS)
composite
photocatalyst
with
best
mass
ratio
increased
evolution
31.99
mmol
g-1
h-1
under
visible
light
irradiation,
corresponding
an
apparent
quantum
efficiency
(AQE)
high
52%
at
420
nm.
Meanwhile,
based
experimental
results
density
functional
theory,
possible
mechanism
FC@NGC/CZS
proposed.
addition,
also
excellent
stability
magnetic
properties.
This
work
provides
scheme
for
enhancement
non-noble
metal
doped
cocatalyst.
ACS Sustainable Chemistry & Engineering,
Journal Year:
2024,
Volume and Issue:
12(21), P. 8236 - 8246
Published: May 15, 2024
Photocatalytic
hydrogen
production
technology
has
emerged
as
one
of
the
most
promising
technologies
to
address
future
energy
crisis.
Cd0.9Zn0.1S
(CZS)
is
a
photocatalyst
for
visible
light
activation
but
limited
by
slow
kinetics
photoexcited
carrier
separation.
Density
functional
theory
(DFT)
calculations
based
on
first-principles
showed
that
introduction
cocatalyst,
N-doped
graphite
carbon
(FC@NC),
could
effectively
reduce
adsorption
free
hydrogen,
thus
accelerating
reaction
CZS.
Supported
theoretical
predictions,
magnetic
FC@NC
nanoparticles
were
successfully
prepared
precipitation
and
calcination
then
combined
with
tetrapod
CZS
ultrasonic
self-assembly
form
FC@NC/CZS
composite
Schottky
contact.
The
best
mass
ratio
proved
considerable
photocatalytic
evolution
rate
up
79.9
±
0.1
mmol
g–1
h–1
under
exposure,
which
was
4.4
times
pristine
CZS,
apparent
quantum
efficiency
(AQE)
at
450
nm
high
52%.
Finally,
experimental
results
DFT
calculations,
possible
mechanism
enhanced
activity
composites
heterojunction
first
proposed.
In
general,
we
attribute
boosted
stable
property
performance
following
three
aspects:
(1)
bimetallic
alloy
cocatalyst
easily
acts
an
electron
collector,
(2)
layer
protects
from
oxidation,
(3)
nitrogen-doped
provides
more
active
sites
reaction.
This
work
provided
green
economical
technique
efficient
using
in
environment.
