ACS Nano,
Journal Year:
2023,
Volume and Issue:
17(8), P. 7584 - 7594
Published: April 7, 2023
Covalent
organic
framework
(COF)
membranes
have
emerged
as
a
promising
candidate
for
energy-efficient
separations,
but
the
angstrom-precision
control
of
channel
size
in
subnanometer
region
remains
challenge
that
has
so
far
restricted
their
potential
gas
separation.
Herein,
we
report
an
ultramicropore-in-nanopore
concept
engineering
matreshka-like
pore-channels
inside
COF
membrane.
In
this
concept,
α-cyclodextrin
(α-CD)
is
situ
encapsulated
during
interfacial
polymerization
which
presumably
results
linear
assembly
(LA)
α-CDs
1D
nanochannels
COF.
The
LA-α-CD-in-TpPa-1
membrane
shows
high
H2
permeance
(∼3000
GPU)
together
with
enhanced
selectivity
(>30)
over
CO2
and
CH4
due
to
formation
fast
selective
H2-transport
pathways.
overall
performance
H2/CO2
H2/CH4
separation
transcends
Robeson
upper
bounds
ranks
among
most
powerful
H2-selective
membranes.
versatility
strategy
demonstrated
by
synthesizing
different
types
LA-α-CD-in-COF
Chemical Society Reviews,
Journal Year:
2022,
Volume and Issue:
51(6), P. 2224 - 2254
Published: Jan. 1, 2022
This
review
summarizes
angstrom-scale
ion
channels
with
0D–3D
pore
structures
and
their
charge,
mono/divalent,
single-ion
selectivities
potential
applications.
Advanced Membranes,
Journal Year:
2022,
Volume and Issue:
2, P. 100032 - 100032
Published: Jan. 1, 2022
Mono-/multivalent
ion-selective
separation
has
become
a
common
requirement
at
the
water-energy
nexus,
including
energy
storage
and
conversion,
water
purification,
sustainable
industrial
processes.
In
this
review,
we
summarize
theory
of
ion
transport
through
membrane
mechanisms
selective
in
nanofiltration
(NF)
briefly.
Recent
advancing
improving
mono-/multivalent
selectivity
thin-film
composite
(TFC)
NF
via
size
sieving
enhancement,
electric
charge
property
regulation
co-enhancement
properties
are
concluded.
What's
more,
three
material
classes—surface
assembly
materials,
nanomaterials
biomimetic
channels
highlighted
as
candidates
for
preparation
membranes.
Lastly,
design
directions
critical
challenges
developing
high-selectivity
membranes
based
on
provided.
Nature Communications,
Journal Year:
2022,
Volume and Issue:
13(1)
Published: Dec. 27, 2022
Microporous
organic
nanotubes
(MONs)
hold
considerable
promise
for
designing
molecular-sieving
membranes
because
of
their
high
microporosity,
customizable
chemical
functionalities,
and
favorable
polymer
affinity.
Herein,
we
report
the
use
MONs
derived
from
covalent
frameworks
to
engineer
15-nm-thick
microporous
via
interfacial
polymerization
(IP).
The
incorporation
a
highly
porous
interpenetrated
MON
layer
on
membrane
before
IP
reaction
leads
formation
polyamide
with
Turing
structure,
enhanced
reduced
thickness.
MON-modified
achieve
remarkable
water
permeability
41.7
L
m-2
h-1
bar-1
retention
boron
(78.0%)
phosphorus
(96.8%)
at
alkaline
conditions
(pH
10),
surpassing
those
reported
nanofiltration
membranes.
Molecular
simulations
reveal
that
introducing
not
only
reduces
amine
molecule
diffusion
toward
phase
boundary
but
also
increases
porosity
density
molecules
around
pores.
This
MON-regulated
strategy
provides
guidelines
creating
high-permeability
precise
nanofiltration.
Journal of the American Chemical Society,
Journal Year:
2022,
Volume and Issue:
144(27), P. 12400 - 12409
Published: June 28, 2022
Nanofluidic
membranes
have
been
demonstrated
as
promising
candidates
for
osmotic
energy
harvesting.
However,
it
remains
a
long-standing
challenge
to
fabricate
high-efficiency
ion-permselective
with
well-defined
channel
architectures.
Here,
we
demonstrate
high-performance
conversion
based
on
oriented
two-dimensional
covalent
organic
frameworks
(COFs)
ultrashort
vertically
aligned
nanofluidic
channels
that
enabled
efficient
and
selective
ion
transport.
Experiments
combined
molecular
dynamics
simulations
revealed
exquisite
control
over
orientation,
charge
polarity,
density
contributed
high
selectivity
permeability.
When
applied
conversion,
pair
of
100
nm
thick
oppositely
charged
COF
achieved
an
ultrahigh
output
power
43.2
W
m-2
at
50-fold
salinity
gradient
up
228.9
the
Dead
Sea
river
water
system.
The
outperforms
state-of-the-art
membranes,
suggesting
great
potential
in
fields
advanced
membrane
technology
conversion.
ACS Energy Letters,
Journal Year:
2022,
Volume and Issue:
7(2), P. 885 - 896
Published: Feb. 2, 2022
Covalent
organic
frameworks
(COF)
displayed
strong
affinity
between
COF
and
Li+
in
terms
of
previous
works.
However,
the
relationship
solvent
molecules
electrolyte
was
exclusive.
Herein,
a
self-supporting
separator
(TPB-BD(OH)2-COF)
synthesized
served
as
lithium
metal
batteries.
The
formation
hydrogen
bond
network
is
due
to
interaction
hydroxyl
functional
group
(−OH)
TPB-BD(OH)2-COF
−OH···F
−OH···O
PF6–,
EC
EMC
within
sheath
achieve
desolvation
process
realize
more
aggregative
electrolyte,
thus
reducing
free
side
effects.
Therefore,
full
cell
assembled
with
superior
cycling
stability
reversible
capacity
114.3
mAh
g–1
after
335
cycles
at
current
density
1C
5
cm–2.
Moreover,
can
perform
well
even
extreme
environments
(temperature
60
°C).
Chemical Society Reviews,
Journal Year:
2022,
Volume and Issue:
51(11), P. 4537 - 4582
Published: Jan. 1, 2022
Water
channels
are
one
of
the
key
pillars
driving
development
next-generation
desalination
and
water
treatment
membranes.
Over
past
two
decades,
rise
nanotechnology
has
brought
together
an
abundance
multifunctional
nanochannels
that
poised
to
reinvent
separation
membranes
with
performances
exceeding
those
state-of-the-art
polymeric
within
water-energy
nexus.
Today,
these
can
be
broadly
categorized
into
biological,
biomimetic
synthetic,
owing
their
different
natures,
physicochemical
properties
methods
for
membrane
nanoarchitectonics.
Furthermore,
against
backdrop
mechanisms,
types
nanochannel
exhibit
unique
merits
limitations,
which
determine
usability
suitability
designs.
Herein,
this
review
outlines
progress
a
comprehensive
amount
nanochannels,
include
aquaporins,
pillar[5]arenes,
I-quartets,
nanotubes
porins,
graphene-based
materials,
metal-
covalent-organic
frameworks,
porous
organic
cages,
MoS2,
MXenes,
offering
comparative
glimpse
where
potential
lies.
First,
we
map
out
background
by
looking
evolution
over
years,
before
discussing
latest
developments
focusing
on
intrinsic
transport
from
chemistry
standpoint.
Next,
put
perspective
fabrication
nanoarchitecture
high-performance
nanochannel-enabled
membranes,
especially
distinct
differences
each
type
how
they
leveraged
unlock
as-promised
high
in
current
mainstream
Lastly,
critically
evaluate
recent
findings
provide
holistic
qualitative
assessment
respect
attributes
most
strongly
valued
engineering,
upcoming
challenges
share
our
perspectives
researchers
pathing
future
directions
coming
age
channels.
