2D Materials,
Journal Year:
2023,
Volume and Issue:
10(2), P. 025022 - 025022
Published: March 14, 2023
Abstract
Graphdiyne
(GDY)
is
a
new
carbon
allotrope
with
excellent
properties
due
to
its
unique
structure
and
highly
conjugated
system.
In
this
work,
GDY/CuMoO
4
(CMO)/CuO
tandem
S-scheme
heterojunction
was
constructed
using
the
cross-coupling
method.
Among
them,
CuI
not
only
used
as
coupling
catalyst
obtain
easily
collected
GDY,
but
also
precursor
for
more
active
composite
catalysts.
2D
GDY
provides
substrate
loading
of
CMO
CuO,
while
system
electrical
conductivity
allow
composites
form
strong
charge
distribution
transport.
The
step-by-step
progressive
heterojunctions
based
on
one-step
calcination
strategy
have
stronger
reducing
activity
carrier
transfer
capability.
intrinsic
mechanism
investigated
by
photoelectrochemical
characterization
in
situ
x-ray
photoelectron
spectroscopy
analysis,
photocatalytic
hydrogen
production
reaction
proposed.
This
work
viable
approach
development
photocatalysis
design
heterojunctions.
ACS Applied Materials & Interfaces,
Journal Year:
2023,
Volume and Issue:
15(16), P. 20027 - 20039
Published: April 12, 2023
Photocatalytic
water
cracking
hydrogen
(H2)
production
is
a
promising
clean
energy
technology.
Therefore,
ternary
CdS@Nb2O5/Nb2CTx
(MXene)
heterojunction
with
hierarchical
structure
was
designed
to
promote
photocatalytic
H2
evolution.
When
Na2S/Na2SO3
and
lactic
acid
were
used
as
sacrificial
agents,
the
evolution
reaction
(HER)
rates
of
optimized
photocatalyst
1501.7
2715.8
μmol
g-1
h-1,
12.4%
26.1%
apparent
quantum
efficiencies
(AQE)
at
420
nm,
respectively.
Its
HER
performance
10.9-fold
higher
than
that
pure
CdS
remained
87%
activity
after
five
rounds
cycle
tests.
Such
an
enhancement
stems
from
excellent
light
absorption
properties,
tight
interfacial
contact,
fast
charge
transfer
channel,
sufficient
active
sites.
Mechanism
analysis
demonstrates
S-scheme
Schottky
junction
synchronous
regulation
boost
for
production.
This
work
creates
possibilities
manufacturing
Nb-based
MXene
photocatalysts
converting
solar
other
applications.
Nanoscale,
Journal Year:
2023,
Volume and Issue:
15(19), P. 8548 - 8577
Published: Jan. 1, 2023
A
photocatalytic
system
driven
by
solar
light
is
one
of
the
promising
strategies
for
converting
CO2
into
valuable
energy.
The
reduction
to
CH4
widely
studied
since
has
a
high
energy
density
as
main
component
nonrenewable
natural
gas.
Therefore,
it
necessary
develop
semiconductor
materials
with
activity
and
selectivity.
Graphitic
carbon
nitride
(g-C3N4/CN)
attracted
widespread
attention
due
its
excellent
redox
ability
visible
response.
hybrid
constructed
loading
cocatalysts
on
g-C3N4
can
significantly
improve
yield
target
products,
serve
general
platform
explore
mechanism
reaction.
Herein,
we
briefly
introduce
theory
selective
photoreduction
basic
properties
cocatalysts.
Then,
several
typical
configurations
modification
cocatalyst/CN
systems
promoting
production
are
presented
in
detail.
In
particular,
systematically
summarize
application
composite
photocatalysts
methane,
according
classification
(monometal,
bimetal,
metal-based
compound,
nanocarbon
materials).
Finally,
challenges
perspectives
developing
cocatalyst/g-C3N4
selectivity
guide
rational
design
catalysts
performance
future.
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.
