ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(11), P. 13839 - 13848
Published: March 6, 2024
The
application
of
covalent
organic
frameworks
(COFs)
for
the
photocatalytic
reduction
CO2
is
mostly
limited
by
severe
charge
recombination
and
low
sunlight
utilization.
Herein,
a
triazine-based
COF
with
an
electron-rich
large
π-conjugated
system
(TCOF)
was
employed
as
building
block
integrated
CuInS2
(CIS)
to
construct
noble-metal-free
high-efficiency
photocatalyst
reduction.
in
situ
growth
CIS
nanosheets
on
TCOF
creates
p–n
heterojunction,
named
CIS@TCOF.
Compared
TCOF,
CIS@TCOF
heterostructure
exhibits
dramatically
boosted
performance
CO2.
produced
HCOOH
yield
over
10
wt
%
can
be
up
171.2
μmol
g–1
h–1
under
visible
light
irradiation
good
reproducibility,
which
about
3
times
high
that
TCOF.
Further
in-depth
studies
indicate
introduction
not
only
enhances
utilization
but
also
restrains
photogenerated
electron–hole
pairs
efficiently
facilitates
photoinduced
transfer
via
heterojunction
due
unique
structural
compositional
features.
This
research
shows
great
potential
COFs
efficient
carbon
fixation
materials
provides
versatile
route
semiconductor-COF
heterostructures
photocatalysis.
Angewandte Chemie International Edition,
Journal Year:
2023,
Volume and Issue:
62(14)
Published: Feb. 9, 2023
Oxygen
vacancies-enriched
black
TiO2
is
one
promising
support
for
enhancing
hydrogen
evolution
reaction
(HER).
Herein,
oxygen
vacancies
enriched
supported
sub-nanometer
Pt
clusters
(Pt/TiO2
-OV
)
with
metal
interactions
designed
through
solvent-free
microwave
and
following
low-temperature
electroless
approach
the
first
time.
High-temperature
strong
reductants
are
not
required
then
can
avoid
aggregation
of
decorated
species.
Experimental
theoretical
calculation
verify
that
created
exhibit
synergistic
effects
optimizing
kinetics.
Based
on
it,
Pt/TiO2
presents
remarkable
electrocatalytic
performance
18
mV
to
achieve
10
mA
cm-2
coupled
small
Tafel
slope
12
dec-1
.
This
work
provides
quick
synthetic
strategy
preparing
titanium
dioxide
based
nanomaterials.
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.
Small,
Journal Year:
2023,
Volume and Issue:
19(48)
Published: Aug. 4, 2023
Abstract
Covalent
organic
frameworks
(COFs)
are
one
type
of
porous
materials
linked
by
covalent
bonds.
COFs
exhibit
many
outstanding
characteristics
such
as
high
porosity,
chemical
and
thermal
stability,
large
specific
surface
area,
efficient
electron
transfer
efficiency,
the
ability
for
predesigned
structures.
These
exceptional
advantages
enable
to
remarkable
performance
in
photocatalysis.
Additionally,
activity
photocatalysts
can
be
significantly
upgraded
ion
doping
formation
heterojunctions.
This
paper
summarizes
latest
research
progress
on
COF‐based
applied
photocatalytic
systems.
Initially,
typical
structures
preparation
methods
analyzed
compared.
Moreover,
essential
principles
reactions
over
COFs‐based
developments
hydrogen
production,
CO
2
reduction,
pollutants
elimination,
transformation,
overall
water
splitting
indicated.
At
last,
outlook
challenges
photocatalysis
discussed.
review
is
intended
permit
instructive
guidance
use
based
future.
Nanoscale,
Journal Year:
2024,
Volume and Issue:
16(9), P. 4352 - 4377
Published: Jan. 1, 2024
The
review
highlights
charge
transfer,
improved
photocatalytic
performance,
and
possible
photocatalysis
schemes
in
TiO
2
-based
composites.
It
also
addresses
perspectives
challenges
transfer
mechanisms
for
photocatalysis.
