Journal of Materials Chemistry A,
Journal Year:
2022,
Volume and Issue:
10(23), P. 12489 - 12496
Published: Jan. 1, 2022
By
integrating
various
electron-donating
units
into
CTFs,
their
photophysical
and
photochemical
properties
can
be
facilely
modulated
to
achieve
an
enhanced
performance
for
photocatalytic
selective
oxidation
of
sulfides
sulfoxides.
Angewandte Chemie International Edition,
Journal Year:
2022,
Volume and Issue:
61(42)
Published: Aug. 27, 2022
Abstract
Two‐dimensional
covalent
organic
frameworks
(2D‐COFs)
have
emerged
as
attractive
platforms
for
solar‐to‐chemical
energy
conversion.
In
this
study,
we
implemented
a
gradient
heating
strategy
to
synthesize
sp
2
‐carbon‐linked
triazine‐based
COF,
COF‐JLU100,
exhibiting
high
crystallinity,
large
surface
area,
good
durability
and
carrier
mobility
solar‐driven
photocatalytic
hydrogen
evolution.
The
Pt‐doped
COF‐JLU100
demonstrated
evolution
rate
of
over
100
000
μmol
g
−1
h
water
splitting
under
visible‐light
illumination
(λ>420
nm).
Experimental
theoretical
studies
corroborate
that
the
cyano‐vinylene
segments
in
extend
π‐delocalization
enable
fast
charge
transfer
separation
rates
well
dispersion
water.
Moreover,
can
be
prepared
by
low‐cost
easily
available
monomers
has
excellent
stability,
which
is
desirable
practical
production.
Nature Communications,
Journal Year:
2022,
Volume and Issue:
13(1)
Published: Oct. 1, 2022
Abstract
Covalent
organic
frameworks
(COFs)
have
constituted
an
emerging
class
of
photocatalysts
showing
enormous
potential
for
visible
photocatalytic
H
2
evolution
from
water.
However,
suffering
sluggish
reaction
kinetics,
COFs
often
cooperate
with
precious
metal
co-catalysts
essential
proton-reducing
capability.
Here,
we
synthesize
a
chiral
β-ketoenamine-linked
COF
coordinated
10.51
wt%
atomically
dispersed
Cu(II)
as
electron
transfer
mediator.
The
enantioselective
combination
the
COF-Cu(II)
skeleton
L-/D-cysteine
sacrificial
donors
remarkably
strengthens
hole
extraction
and
in
turn,
photoinduced
electrons
accumulate
rapidly
via
Cu
ions.
Also,
parallelly
stacking
sequence
provides
energetically
favorable
arrangement
H-adsorbed
sites.
Thus,
without
metal,
rate
reaches
high
14.72
mmol
h
−1
g
enantiomeric
mixtures.
This
study
opens
up
strategy
optimizing
kinetics
promises
exciting
photocatalysis.
Advanced Materials,
Journal Year:
2023,
Volume and Issue:
35(48)
Published: April 24, 2023
Covalent
organic
frameworks
(COFs)
are
new
porous
materials
constructed
by
covalent
bonds,
with
the
advantages
of
pre-designable
topology,
adjustable
pore
size,
and
abundant
active
sites.
Many
research
studies
have
shown
that
COFs
exhibit
great
potential
in
gas
adsorption,
molecular
separation,
catalysis,
drug
delivery,
energy
storage,
etc.
However,
electrons
holes
intrinsic
COF
prone
to
compounding
transport,
carrier
lifetime
is
short.
The
donor-acceptor
(D-A)
type
COFs,
which
synthesized
introducing
D
A
units
into
backbone,
combine
separated
electron
hole
migration
pathway,
tunable
band
gap
optoelectronic
properties
D-A
polymers
unique
made
progress
related
recent
years.
Here,
synthetic
strategies
first
outlined,
including
rational
design
linkages
as
well
functionalization
approaches.
Then
applications
catalytic
reactions,
photothermal
therapy,
electronic
systematically
summarized.
In
final
section,
current
challenges,
directions
for
development
presented.
Eco-Environment & Health,
Journal Year:
2023,
Volume and Issue:
2(3), P. 117 - 130
Published: July 13, 2023
To
date,
significant
efforts
have
been
devoted
to
eliminating
hazardous
components
purify
wastewater
through
the
development
of
various
nanomaterials.
Covalent
organic
frameworks
(COFs),
an
important
branch
porous
crystalline
family,
possess
peculiarity
ultrahigh
surface
area,
adjustable
pore
size,
and
facile
functionality.
Exciting
studies
from
design
fabrication
potential
applications
in
water
treatment
by
COF-based
membranes
(COMs)
emerged.
This
review
summarizes
preparation
strategies
synthesis
mechanisms
for
COMs,
including
layer-by-layer
stacking,
situ
growth,
interfacial
polymerization,
electrochemical
synthesis,
briefly
describes
advanced
characterization
techniques
COMs.
Moreover,
application
COMs
heavy
metal
removal,
dye
separation,
purification
radionuclides,
pollutant
detection,
sea
desalination,
so
on,
is
described
discussed.
Finally,
perspectives
on
future
opportunities
designing
proposed.
Molecules,
Journal Year:
2023,
Volume and Issue:
28(11), P. 4507 - 4507
Published: June 1, 2023
Conjugated
polymer
photocatalysts
for
hydrogen
production
have
the
advantages
of
an
adjustable
structure,
strong
response
in
visible
light
region,
energy
levels,
and
easy
functionalization.
Using
atom-
step-economic
direct
C–H
arylation
method,
dibromocyanostilbene
was
polymerized
with
thiophene,
dithiophene,
terthiophene,
fused
thienothiophene
dithienothiophene,
respectively,
to
produce
donor–acceptor
(D-A)-type
linear
conjugated
polymers
containing
different
thiophene
derivatives
conjugation
lengths.
Among
them,
D-A
photocatalyst
constructed
from
dithienothiophene
could
significantly
broaden
spectral
response,
a
evolution
rate
up
12.15
mmol
h−1
g−1.
The
results
showed
that
increase
number
rings
on
building
blocks
beneficial
photocatalytic
cyanostyrylphene-based
polymers.
For
unfused
dithiophene
enabled
more
rotation
freedom
between
reduced
intrinsic
charge
mobility,
resulting
lower
performance
accordingly.
This
study
provides
suitable
process
design
electron
donors
photocatalysts.
Journal of Materials Chemistry A,
Journal Year:
2023,
Volume and Issue:
11(27), P. 14489 - 14538
Published: Jan. 1, 2023
Covalent
organic
frameworks
provide
a
platform
for
the
integration
of
functional
linkers
into
ordered
yet
tunable
two-dimensional
to
yield
π–π
stacked
conjugated
materials
photocatalytic
water
splitting
hydrogen
generation.
Journal of the American Chemical Society,
Journal Year:
2023,
Volume and Issue:
145(9), P. 5203 - 5210
Published: Feb. 13, 2023
sp2
carbon-conjugated
covalent
organic
frameworks
(sp2c-COFs)
with
superb
in-plane
π-conjugations,
high
chemical
stability,
and
robust
framework
structure
are
expected
to
be
ideal
films/membranes
for
a
wide
range
of
applications
including
energy-related
devices
optoelectronics.
However,
so
far,
sp2c-COFs
have
been
mainly
limited
microcrystalline
powders,
this
consequently
hampered
their
performances
in
devices.
Herein,
we
report
simple
methodology
fabricate
large-area,
free-standing,
crystalline
sp2c-COF
films
(TFPT–TMT
TB–TMT)
on
various
solid
substrates
(e.g.,
fluorine-doped
tin
oxide,
aluminum
sheet,
polyacrylonitrile
membrane)
by
self-assembly
monolayer-assisted
surface-initiated
Schiff-base-mediated
aldol
polycondensation
(namely,
SI-SBMAP).
The
resultant
show
lateral
sizes
up
120
cm2
tunable
thickness
from
tens
nanometers
few
micrometers.
Owing
the
highly
ordered
quasi-1D
channels,
membrane-based
osmotic
power
generator
presents
an
output
density
14.1
W
m–2
under
harsh
conditions,
outperforming
most
reported
COF
membranes
as
well
commercialized
benchmark
(5
m–2).
This
work
demonstrates
interfacial
fabrication
green
energy
potential
Materials Chemistry Frontiers,
Journal Year:
2023,
Volume and Issue:
7(16), P. 3298 - 3331
Published: Jan. 1, 2023
This
review
provides
an
overview
of
the
recent
advances
in
heterogeneous
catalysis
using
COFs,
primarily
from
2020
to
2023,
covering
fundamentals,
advantages,
current
challenges,
and
future
perspectives.
Advanced Materials,
Journal Year:
2023,
Volume and Issue:
36(1)
Published: Oct. 2, 2023
Covalent
organic
frameworks
(COFs)
have
shown
great
advantages
as
photocatalysts
for
hydrogen
evolution.
However,
the
effect
of
linkage
geometry
and
type
on
extent
π-electron
conjugation
in
plane
framework
photocatalytic
properties
COFs
remains
a
significant
challenge.
Herein,
two
Kagome
(kgm)
topologic
oligo(phenylenevinylene)-based
are
designed
synthesized
boosting
evolution
via
"two
one"
strategy.
Under
visible
light
irradiation,
COF-954
with
5
wt%
Pt
cocatalyst
exhibits
high
rate
(HER)
137.23
mmol
g