Advanced Functional Materials,
Год журнала:
2021,
Номер
32(15)
Опубликована: Дек. 29, 2021
Abstract
Photoreduction
of
CO
2
without
photosensitizers
and
scavengers
runs
into
the
development
bottleneck
for
lack
excellent
photocatalysts
ambiguous
reduction
mechanism.
Herein,
an
ultrathin
CoO
layer
containing
Zn‐dopants
O‐vacancies
(V
o
‐Zn‐CoO)
is
designed
as
archetype
to
explore
influence
mechanism
Zn
on
in
nanolayer
photoreduction.
DFT
calculations
illustrate
that
not
only
reduce
formation
barriers
*COOH
*CO
intermediates,
but
also
form
π‐back‐bonding
with
stimulating
CH
4
evolution.
Finally,
V
‐Zn‐CoO
significantly
enhances
photoreduction
efficiency
selectivity
26.8
µmol
g
−1
h
(63.8%)
compared
7.2
(23.6%)
O‐vacancies.
Moreover,
synergistic
effect
benefits
stability
photocatalysts,
achieving
durable
photocatalytic
performance
layer.
This
work
manifests
strategy
metal
atoms
effective
optimize
efficiency,
selectivity,
photocatalyst
Nanomaterials,
Год журнала:
2022,
Номер
12(2), С. 294 - 294
Опубликована: Янв. 17, 2022
g-C3N4
has
drawn
lots
of
attention
due
to
its
photocatalytic
activity,
low-cost
and
facile
synthesis,
interesting
layered
structure.
However,
improve
some
the
properties
g-C3N4,
such
as
photochemical
stability,
electrical
band
structure,
decrease
charge
recombination
rate,
towards
effective
light-harvesting,
g-C3N4–metal
oxide-based
heterojunctions
have
been
introduced.
In
this
review,
we
initially
discussed
preparation,
modification,
physical
then,
combination
with
various
metal
oxides
TiO2,
ZnO,
FeO,
Fe2O3,
Fe3O4,
WO3,
SnO,
SnO2,
etc.
We
summarized
their
characteristic
these
heterojunctions,
optical
features,
performance,
edge
positions.
This
review
covers
recent
advances,
including
applications
in
water
splitting,
CO2
reduction,
photodegradation
organic
pollutants,
sensors,
bacterial
disinfection,
supercapacitors.
show
that
can
efficiency
bare
make
composites
suitable
for
a
wide
range
applications.
Finally,
provides
perspectives,
limitations,
challenges
investigation
g-C3N4–metal-oxide-based
heterojunctions.
CO2
capture
and
conversion
has
been
prospected
as
an
auspicious
technology
to
simultaneously
tackle
the
rise
in
global
emission
produce
value-added
fuels
with
goal
of
accomplishing
carbon
neutrality.
A
sustainable
route
achieve
this
is
via
utilization
solar
energy,
thereby
harnessing
abundant
nonexhaustive
resource
shift
our
reliance
away
from
rapidly
depleting
fossil
fuels.
Graphitic
nitride
(g-C3N4)
its
allotrope
have
earned
rank
a
fascinating
metal-free
photocatalyst
due
superior
stability,
high
surface-area-to-volume
ratio,
tunable
surface
engineering.
By
leveraging
these
properties,
robust
nitride-based
nanostructures
are
engineered
for
photocatalytic
energy-rich
C1C2
product,
which
indispensable
chemical
industry.
Thus,
review
presents
latest
panorama
experimental
computational
research
on
tuning
local
electronic,
coordination
environment,
charge
dynamics
optical
properties
low-dimensional
allotropes
toward
highly
selective
efficient
photoconversion.
To
name
few,
structural
engineering,
point-defect
heterojunction
construction,
cocatalyst
loading.
advance
frontier,
critical
insights
elucidated
establish
structure-performance
relationship
unravel
primary
factors
dictating
selectivity
molecules
reduction.
External-field
assisted
photocatalysis
such
electric
(photoelectro-)
heat
(photothermal)
discussed
uncover
synergistic
contributions
that
drive
development
photochemistry.
Last,
future
challenges
prospects
outlined
potential
application
solar-driven
conversion,
along
scale-up
strategy
economic
viewpoint
rational
high-efficiency
catalysts.
ACS Applied Nano Materials,
Год журнала:
2023,
Номер
6(17), С. 15709 - 15720
Опубликована: Авг. 29, 2023
In
this
study,
a
Bi4O5Br2/CdWO4
(BOB/CWO)
composite
photocatalyst
was
designed
and
prepared
using
convenient
hydrothermal
method.
A
detailed
investigation
carried
out
on
the
morphology,
specific
surface
area,
structure,
optical
properties,
photoelectric
chemical
properties
of
BOB/CWO
composite.
The
CdWO4
nanorods
were
found
to
disperse
Bi4O5Br2
nanoflowers,
their
tight
contact
between
resulted
in
formation
heterojunction
structure.
By
analysis
band
structure
two
semiconductors,
it
that
worked
type
II
mechanism,
effectively
improving
separation
efficiency
electron–hole
pairs.
Therefore,
exhibited
high
performance
photocatalytic
N2
fixation
(PNF)
reactions.
optimal
catalyst
presents
PNF
rate
501
μmol
L–1
g–1
h–1
under
simulated
sunlight
irradiation,
which
5.7
3.1
times
pure
Bi4O5Br2,
respectively.
Under
visible-light
illumination,
sensitized
coupling
effect
boosting
reaction
could
still
be
observed.
findings
study
are
anticipated
offer
practical
knowledge
about
design
synthesis
efficient
photocatalysts
for
PNF.
Photocatalysis
has
the
advantages
of
practical,
sustainable
and
environmental
protection,
so
it
plays
a
significant
role
in
energy
transformation
utilization.
CeO
