Advanced Materials,
Journal Year:
2023,
Volume and Issue:
36(14)
Published: Dec. 25, 2023
The
inability
to
process
many
covalent
organic
frameworks
(COFs)
as
thin
films
plagues
their
widespread
utilization.
Herein,
a
vapor-phase
pathway
for
the
bottom-up
synthesis
of
class
porphyrin-based
COFs
is
presented.
This
approach
allows
integrating
electrocatalysts
made
metal-ion-containing
into
electrodes'
architectures
in
single-step
and
deposition.
By
precisely
controlling
metal
sites
at
atomic
level,
remarkable
electrocatalytic
performance
achieved,
resulting
unprecedentedly
high
mass
activity
values.
How
choice
atoms,
i.e.,
cobalt
copper,
can
determine
catalytic
activities
POR-COFs
demonstrated.
theoretical
data
proves
that
Cu
site
highly
active
nitrate
conversion
ammonia
on
synthesized
COFs.
Chemical Society Reviews,
Journal Year:
2023,
Volume and Issue:
52(20), P. 7071 - 7136
Published: Jan. 1, 2023
This
review
highlights
the
film
preparation
methods
and
application
advances
in
memory
neuromorphic
electronics
of
porous
crystalline
materials,
involving
MOFs,
COFs,
HOFs,
zeolites.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(19)
Published: Jan. 6, 2024
Abstract
Crystalline
porous
materials
(CPMs),
including
covalent
organic
frameworks
(COFs)
and
metal–organic
(MOFs),
are
promising
for
advanced
separation
technologies.
However,
the
challenge
of
transforming
nanoscale
CPMs
into
large‐area
functional
membranes
hinders
their
application
in
membrane
process.
Herein,
a
self‐standing
pure
COF
(TpPa‐1)
nanofiber
with
high
crystallinity,
good
flexibility,
excellent
mechanical
properties,
scalability
is
prepared
using
an
electrospinning
process
polymer
sacrificial
template
strategy.
Subsequently,
innovatively
used
to
replace
traditional
inorganic
discs,
metal
meshes,
as
supports,
COF–MOF
composite
CPM
through
tailorable
confined
growth
zeolite
imidazolium
salt
frame‐8
(ZIF‐8)
on
surface
gaps
nanofibers.
The
exhibits
permeability
significantly
enhances
selectivity
dyes.
Moreover,
MOF
form
interpenetrating
network
structure,
similar
chemical
properties
improve
interfacial
stability
between
two
phases,
giving
long‐term
performance.
This
first
molecular
sieving
performance,
which
provides
new
insights
design
high‐performance
robust
membranes.
Nature Communications,
Journal Year:
2024,
Volume and Issue:
15(1)
Published: May 8, 2024
Abstract
As
one
of
the
most
attractive
methods
for
synthesis
ordered
hierarchically
porous
crystalline
materials,
soft-template
method
has
not
appeared
in
covalent
organic
frameworks
(COFs)
due
to
incompatibility
surfactant
self-assembly
and
guided
crystallization
process
COF
precursors
phase.
Herein,
we
connect
soft
templates
backbone
through
ionic
bonds,
avoiding
their
incompatibilities,
thus
introducing
an
additional
arrangement
into
anionic
microporous
COFs.
The
ion
exchange
is
used
remove
while
maintaining
high
crystallinity
COFs,
resulting
construction
COFs
with
micropores/mesopores,
herein
named
OHMMCOFs
(OHMMCOF-1
OHMMCOF-2).
exhibit
significantly
enhanced
functional
group
accessibility
faster
mass
transfer
rate.
extrinsic
porosity
can
be
adjusted
by
changing
template
length,
concentration,
ratio.
Cationic
guanidine-based
(OHMMCOF-3)
are
also
constructed
using
same
method,
which
verifies
scalability
strategy.
This
work
provides
a
path
constructing
tunable
greatly
improved
efficiency
accessibility.
Angewandte Chemie International Edition,
Journal Year:
2023,
Volume and Issue:
63(4)
Published: Nov. 30, 2023
Abstract
Covalent
organic
framework
(COF)
membranes
featuring
uniform
topological
structures
and
devisable
functions,
show
huge
potential
in
water
purification
molecular
separation.
Nevertheless,
the
inability
of
COF
to
be
produced
on
an
industrial
scale
their
nonenvironmentally
friendly
fabrication
method
are
bottleneck
preventing
applications.
Herein,
we
report
a
new
green
industrially
adaptable
scraping‐assisted
interfacial
polymerization
(SAIP)
technique
fabricate
scalable
TpPa
membranes.
The
process
used
non‐toxic
low‐volatility
ionic
liquids
(ILs)
as
phase
instead
conventional
solvents
for
synthesis
layer
support
membrane,
which
can
simultaneously
achieve
purposes
(i)
improving
greenness
membrane‐forming
(ii)
fabricating
robust
membrane
that
function
beyond
This
approach
yields
large‐area,
continuous
(19×25
cm
2
)
with
thickness
78
nm
within
brief
period
minutes.
resulting
exhibited
unprecedented
combination
high
permeance
(48.09
L
m
−2
h
−1
bar
antibiotic
desalination
efficiency
(e.g.,
NaCl/adriamycin
separation
factor
41.8),
is
superior
commercial
benchmarking
Advanced Science,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 11, 2024
Membranes
with
switchable
wettability,
solvent
resistance,
and
toughness
have
emerged
as
promising
materials
for
separation
applications.
However,
challenges
like
limited
mechanical
strength,
poor
chemical
stability,
structural
defects
during
membrane
fabrication
hinder
their
widespread
adoption.
Covalent
organic
frameworks
(COFs),
crystalline
constructed
from
molecules
connected
by
covalent
bonds,
offer
a
solution
due
to
high
porosity,
customizable
properties.
The
ordered
structures
functionality
provide
COFs
lightweight
framework,
large
surface
area,
tunable
pore
sizes,
which
attracted
increasing
attention
applications
in
separations.
Recent
research
has
extensively
explored
the
preparation
strategies
of
COF
membranes
various
processes.
This
review
uniquely
delves
into
influence
techniques,
including
interfacial
polymerization,
layer-by-layer
assembly,
situ
growth,
on
thickness
performance.
It
comprehensively
explores
design
potential
these
methods,
particular
focus
gas
separation,
oil/water
nanofiltration.
Furthermore,
future
opportunities,
within
this
field,
directions
development
are
proposed.
