Small Methods,
Journal Year:
2023,
Volume and Issue:
8(4)
Published: May 18, 2023
Abstract
Biological
ion
channels
can
realize
high‐speed
and
high‐selective
transport
through
the
protein
filter
with
sub‐1‐nanometer
channel.
Inspired
by
biological
channels,
various
kinds
of
artificial
subnanopores,
subnanochannels,
subnanoslits
improved
selectivity
permeability
are
recently
developed
for
efficient
separation,
energy
conversion,
biosensing.
This
review
article
discusses
advanced
fabrication
functionalization
methods
constructing
subnanofluidic
pores,
tubes,
slits,
which
have
shown
great
potential
applications.
Novel
producing
subnanofluidics,
including
top‐down
techniques
such
as
electron
beam
etching,
irradiation,
electrochemical
well
bottom‐up
approaches
starting
from
microporous
frameworks,
polymers,
lipid
bilayer
embedded
stacked
2D
materials
summarized.
Meanwhile,
subnanochannels
discussed
based
on
introduction
functional
groups,
classified
into
direct
synthesis,
covalent
bond
modifications,
molecule
fillings.
These
enabled
construction
precise
control
structure,
size,
functionality.
The
current
progress,
challenges,
future
directions
in
field
also
discussed.
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.
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
Advanced Materials,
Journal Year:
2023,
Volume and Issue:
35(26)
Published: March 27, 2023
Highly
flexible
and
robust
self-standing
covalent
organic
framework
(COF)
membranes
with
rapid
preparation
are
important
but
technically
challenging
for
achieving
precise
separation.
Herein
,
a
novel
imine-based
2D
soft
(SCOF)
membrane
large
area
of
226.9
cm2
via
ingeniously
selecting
an
aldehyde
linker
trigonal
building
block,
is
reported.
The
rapidly
formed
(≈5
min)
based
on
the
sodium
dodecyl
sulfate
(SDS)
molecular
channel
constructed
at
water/dichloromethane
(DCM)
interface,
which
record-fast
SCOF
formation
72
times
faster
than
that
in
reported
literature.
MD
simulation
DFT
calculation
elucidate
dynamic,
self-assembled
SDS
facilitates
more
homogeneous
transfer
amine
monomers
bulk,
thereby
forming
COF
uniform
pores.
exhibits
superb
sieving
capability
small
molecules,
robustness
strong
alkaline
(5
mol
L-1
NaOH),
acid
(0.1
HCl),
various
solutions,
sufficient
flexibility
curvature
2000
m-1
membrane-based
separation
science
technology.
Proceedings of the National Academy of Sciences,
Journal Year:
2024,
Volume and Issue:
121(8)
Published: Feb. 13, 2024
Understanding
the
molecular-level
mechanisms
involved
in
transmembrane
ion
selectivity
is
essential
for
optimizing
membrane
separation
performance.
In
this
study,
we
reveal
our
observations
regarding
behavior
of
Li
+
and
Mg
2+
ions
as
a
response
to
changing
pore
solvation
abilities
covalent-organic-framework
(COF)
membranes.
These
were
manipulated
by
adjusting
lengths
oligoether
segments
attached
channels.
Through
comparative
experiments,
able
unravel
relationships
between
ability
various
transport
properties,
such
partitioning,
conduction,
selectivity.
We
also
emphasize
significance
competition
with
solvating
modulating
found
that
increasing
length
chain
facilitated
transport;
however,
it
was
COF
chains
containing
two
ethylene
oxide
units
exhibited
most
pronounced
discrepancy
energy
barrier
,
resulting
highest
factor
among
all
evaluated
Remarkably,
under
electro-driven
binary-salt
conditions,
specific
achieved
an
exceptional
/Mg
up
1352,
making
one
effective
membranes
available
separation.
The
insights
gained
from
study
significantly
contribute
advancing
understanding
selective
within
confined
nanospaces
provide
valuable
design
principles
developing
highly
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.
