Optimization of cation selectivity based on channel chemistry of covalent organic framework under confined size
Xiaorui Chu,
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Jibin Miao,
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Qianqian Ge
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et al.
Journal of Membrane Science,
Journal Year:
2025,
Volume and Issue:
unknown, P. 123860 - 123860
Published: Feb. 1, 2025
Language: Английский
Hybrid Energy Harvesting Enabled by a Covalent Organic Framework Membrane
Junsin Yi,
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Zhuozhi Lai,
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Qing Guo
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et al.
Advanced Membranes,
Journal Year:
2025,
Volume and Issue:
unknown, P. 100130 - 100130
Published: Jan. 1, 2025
Language: Английский
Creating Sodium Ion Channels via De Novo Encapsulation of Ionophores for Enhanced Water Energy Harvesting
Qing Guo,
No information about this author
Zhiwei Xing,
No information about this author
Huaxi Guo
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et al.
Advanced Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 30, 2025
Abstract
Biological
ion
channels
achieve
remarkable
permselectivity
and
cation
discrimination
through
the
synergy
of
their
intricate
architectures
specialized
ionophores
within
confined
nanospaces,
enabling
efficient
energy
conversion.
Emulating
such
selectivity
in
synthetic
nanochannels,
however,
remains
a
persistent
challenge.
To
address
this,
novel
host‐guest
assembly
membrane
is
developed
by
incorporating
sodium‐selective
into
β‐ketoenamine‐linked
covalent
organic
framework
(COF).
This
design
confers
exceptional
Na
+
selectivity,
achieving
/K
/Li
ratios
3.6
103,
respectively,
along
with
near‐perfect
/Cl
−
under
0.5
M
||
0.01
salinity
gradient.
Notably,
dynamically
switches
its
to
favor
anion
transport
presence
high‐valent
cations
(e.g.,
Ca
2+
),
overcoming
limitations
as
uphill
diffusion
back
currents
observed
conventional
cation‐selective
membranes.
adaptive
behavior
yields
4.6‐fold
increase
output
power
density
‐rich
environments.
These
findings
advance
biomimetic
nanochannels
unparalleled
enhanced
conversion
efficiency.
Language: Английский
Rational design of two-dimensional nanosheets membranes for lithium extraction from brine: Recent progress and future opportunities
Desalination,
Journal Year:
2025,
Volume and Issue:
unknown, P. 118895 - 118895
Published: April 1, 2025
Language: Английский
Staggered-Stacking Two-Dimensional Covalent Organic Framework Membranes for Molecular and Ionic Sieving
Jingfeng Wang,
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Xiaoming Zhang,
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Ruichen Shen
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et al.
ACS Nano,
Journal Year:
2024,
Volume and Issue:
18(51), P. 34698 - 34707
Published: Dec. 10, 2024
Two-dimensional
covalent
organic
frameworks
(2D
COFs),
a
family
of
crystalline
materials
with
abundant
porous
structures
offering
nanochannels
for
molecular
transport,
have
enormous
potential
in
the
applications
separation,
energy
storage,
and
catalysis.
However,
2D
COFs
remain
limited
by
relatively
large
pore
sizes
(>1
nm)
weak
interlayer
interactions
between
nanosheets,
making
it
difficult
to
achieve
efficient
membranes
meet
selective
sieving
requirements
water
molecules
(0.3
hydrated
salt
ions
(>0.7
nm).
Here,
we
report
high-performance
COF
membrane
narrowed
channels
(0.7
×
0.4
nm2)
excellent
mechanical
performance
constructed
staggered
stacking
cationic
anionic
nanosheets
selectively
ions.
The
has
been
improved
two
times
than
that
single-phase
due
enhanced
nanosheets.
stacked
exhibit
significantly
monovalent
rejection
ratio
(up
77.9%)
compared
(∼49.2%),
while
maintaining
comparable
permeability.
design
provides
strategy
constructing
nanoporous
precise
ionic
sieving.
Language: Английский
Efficient Ion Screening Boosted by MOF/COF Bilayer Membrane Through Multiple Separation Mechanisms
Yu Ma,
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Lin Liu,
No information about this author
Ruihe Yu
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et al.
Small,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 27, 2024
Abstract
Porous
organic
frameworks
(POFs),
including
metal‐organic
(MOFs)
and
covalent
(COFs),
have
drawn
attention
as
ion‐selective
materials
due
to
their
well‐defined
channels
functional
sites.
However,
individual
limitations
require
novel
approaches
maximize
potential.
In
this
study,
a
hybrid
bilayer
membrane
combining
MOFs
COFs
on
nylon
substrate
via
consecutive
liquid‐liquid
interface
polymerization
is
developed.
This
method
forms
robust
chemical
bonds
between
the
MOF
COF
layers,
creating
efficient
ion
transport
channels.
The
integration
of
ZIF‐8
(MOF
layer),
which
exhibits
strong
electrostatic
repulsion
against
cations,
with
TpPa‐SO
3
H
(COF
offering
cation
coordination,
results
in
synergistic
effect
that
significantly
enhances
separation.
ZIF‐8/TpPa‐SO
H/nylon
achieved
Li
+
/Mg
2+
separation
ratio
501,
400
times
higher
than
pristine
200
membrane.
outstanding
performance
combined
layer
coordination
layer,
enabling
precise
discrimination.
membrane's
structural
integrity
stability
further
contribute
its
superior
efficiency,
making
it
promising
candidate
for
large‐scale
lithium
extraction
from
salt
lakes.
Language: Английский
Efficient Light-Driven Ion Pumping for Deep Desalination via the Vertical Gradient Protonation of Covalent Organic Framework Membranes
Weipeng Xian,
No information about this author
Xiaoyi Xu,
No information about this author
Yongxin Ge
No information about this author
et al.
Journal of the American Chemical Society,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 28, 2024
Traditional
desalination
methods
face
criticism
due
to
high
energy
requirements
and
inadequate
trace
ion
removal,
whereas
natural
light-driven
pumps
offer
superior
efficiency.
Current
synthetic
systems
are
constrained
by
short
exciton
lifetimes,
which
limit
their
ability
generate
sufficient
electric
fields
for
effective
pumping.
We
introduce
an
innovative
approach
utilizing
covalent-organic
framework
membranes
that
enhance
light
absorption
reduce
charge
recombination
through
vertical
gradient
protonation
of
imine
linkages
during
acid-catalyzed
liquid-liquid
interfacial
polymerization.
This
technique
creates
intralayer
interlayer
heterojunctions,
facilitating
hybridization
establishing
a
robust
built-in
field
under
illumination.
These
improvements
enable
the
achieve
remarkable
transport
across
extreme
concentration
gradients
(2000:1),
with
rate
approximately
3.2
×
10
Language: Английский