Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: March 10, 2024
Abstract
Covalent
organic
frameworks
(COFs)
attract
significant
attention
due
to
their
ordered,
crystalline,
porous,
metal‐free,
and
predictable
structures.
These
unique
characteristics
offer
great
opportunities
for
the
diffusion
transmission
of
photogenerated
charges
during
photocatalysis.
Currently,
a
considerable
number
COFs
are
used
as
metal‐free
semiconductor
photocatalysts.
This
review
aims
understand
relationships
between
structure
photocatalysis
performance
provides
in‐depth
insight
into
synthetic
strategy
improve
performance.
Subsequently,
focuses
on
structural
motif
in
sustainable
photocatalytic
hydrogen
evolution,
carbon
dioxide
reduction,
peroxide
generation,
compound
transformations.
Last,
conjunction
with
progress
achieved
challenges
yet
be
overcome,
candid
discussion
is
undertaken
regarding
field
COF
photocatalysis,
accompanied
by
presentation
potential
research
avenues
future
directions.
seeks
provide
readers
comprehensive
understanding
pivotal
role
robust
guidance
innovative
utilization
Journal of the American Chemical Society,
Journal Year:
2023,
Volume and Issue:
145(36), P. 19856 - 19865
Published: Aug. 31, 2023
Introducing
an
external
visible-light
field
would
be
a
promising
strategy
to
improve
the
activity
of
electrocatalytic
CO2
reduction
reaction
(CO2RR),
but
it
still
remains
challenge
due
short
excited-state
lifetime
active
sites.
Herein,
Ru(bpy)3Cl2
struts
as
powerful
photosensitive
donors
were
immobilized
into
backbones
Co-porphyrin-based
covalent
organic
frameworks
(named
Co-Bpy-COF-Rux,
x
is
molar
ratio
Ru
and
Co
species,
=
1/2
2/3)
via
coordination
bonds,
for
photo-coupled
CO2RR
produce
CO.
The
optimal
Co-Bpy-COF-Ru1/2
displays
high
CO
Faradaic
efficiency
96.7%
at
-0.7
V
vs
reversible
hydrogen
electrode
(RHE)
partial
current
density
16.27
mA
cm-2
-1.1
RHE
under
assistance
light,
both
which
far
surpassing
values
observed
in
dark.
significantly
enhanced
mainly
attributed
incorporation
donor
with
long
concomitantly
giant
built-in
electric
Co-Bpy-COF-Ru1/2,
efficiently
accelerate
photo-induced
electron
transfer
from
cobalt-porphyrin
light.
Thus,
sites
have
longer
lower
rate-determining
steps'
energy
occurring
during
actual
process.
This
first
work
porphyrin-based
COFs
CO2RR,
opening
new
frontier
construction
efficient
electrocatalysts.
Advanced Functional Materials,
Journal Year:
2023,
Volume and Issue:
34(43)
Published: Oct. 15, 2023
Abstract
Photochemical
CO
2
reduction
using
ubiquitous
sunlight
akin
to
natural
photosynthesis
is
an
effective
approach
for
conversion
of
renewable
energy
into
useful
chemical
feedstock.
Driven
by
the
need
earth‐abundant,
inexpensive,
and
sustainable
photocatalysts
with
practical
applicability,
covalent
organic
frameworks
(COFs)
have
emerged
as
a
new
generation
molecularly
defined
semiconductors
tunable
optoelectronic
properties.
These
reticular
highly
ordered,
porous
crystalline
structures
can
be
tailor‐made
covalently
combining
building
blocks
target
specific
functions.
To
date,
numerous
COFs
been
reported,
which
show
promising
activity
photocatalytic
allowing
derive
structure–property–function
relationships.
In
this
review,
different
reported
strategies
are
comprehensively
analyzed
categorized
active
site
engineering
in
COF
synthetic
rationale
resulting
catalytic
each
discussed.
The
recent
advancements
terms
tailored
photocatalyst
design
then
critically
assessed,
aspects
advanced
materials
characterization
analyzed,
future
perspectives
challenges
field
highlighted.
ACS Nano,
Journal Year:
2024,
Volume and Issue:
18(33), P. 21804 - 21835
Published: Aug. 8, 2024
Covalent
organic
frameworks
(COFs)
are
crystalline
networks
with
extended
backbones
cross-linked
by
covalent
bonds.
Due
to
the
semiconductive
properties
and
variable
metal
coordinating
sites,
along
rapid
development
in
linkage
chemistry,
utilization
of
COFs
photocatalytic
CO2RR
has
attracted
many
scientists'
interests.
In
this
Review,
we
summarize
latest
research
progress
on
for
CO2
reduction.
first
part,
present
COF
linkages
that
have
been
used
CO2RR,
discuss
four
mechanisms
including
as
intrinsic
photocatalysts,
photosensitive
motifs
metalated
semiconductors
heterojunction
photocatalysts.
Then,
principles
structural
designs
functional
building
units
stacking
mode
exchange.
Finally,
outlook
challenges
provided.
This
Review
is
intended
give
some
guidance
design
synthesis
diverse
different
linkages,
various
structures,
divergent
modes
efficient
photoreduction
CO2.
