Angewandte Chemie International Edition,
Год журнала:
2023,
Номер
63(6)
Опубликована: Ноя. 28, 2023
Ion-selective
membranes
are
crucial
in
various
chemical
and
physiological
processes.
Numerous
studies
have
demonstrated
progress
separating
monovalent/multivalent
ions,
but
efficient
monovalent/monovalent
ion
sieving
remains
a
great
challenge
due
to
their
same
valence
similar
radii.
Here,
this
work
reports
two-dimensional
(2D)
MXene
membrane
with
super-aligned
slit-shaped
nanochannels
ultrahigh
monovalent
selectivity.
The
is
prepared
by
applying
shear
forces
liquid-crystalline
(LC)
dispersion,
which
conducive
the
highly-ordered
stacking
of
nanosheets.
obtained
LC
(LCMM)
exhibits
selectivities
toward
Li
Environmental Science & Technology,
Год журнала:
2022,
Номер
56(24), С. 18018 - 18029
Опубликована: Ноя. 29, 2022
A
nanofiltration
(NF)
membrane
with
high
salt
permeation
and
retention
of
small
organics
is
appealing
for
the
treatment
high-salinity
organic
wastewater.
However,
conventional
negatively
charged
NF
membranes
commonly
show
divalent
anions
(e.g.,
SO42–),
reported
positively
normally
suffer
super
low
selectivity
organics/Na2SO4
fouling
potential.
In
this
work,
we
propose
a
novel
"etching–swelling–planting"
strategy
assisted
by
interfacial
polymerization
mussel-inspired
catecholamine
chemistry
to
prepare
mix-charged
membrane.
By
X-ray
photoelectron
spectroscopy
depth
profiling
pore
size
distribution
analysis,
it
was
found
that
such
could
not
only
deepen
positive
charge
but
also
narrow
size.
Molecular
dynamics
confirm
planted
polyethyleneimine
chains
play
an
important
role
relay
SO42–
ions
facilitate
their
transport
across
membrane,
thus
reversing
Na2SO4
glucose
(43
vs
71%).
Meanwhile,
due
surface
hydrophilicity
smoothness
as
well
preservation
abundant
groups
(−OH
−COOH)
inside
separation
layer,
obtained
exhibited
excellent
antifouling
performance,
even
coking
This
study
advances
importance
vertical
in
performance.
ACS Energy Letters,
Год журнала:
2022,
Номер
7(9), С. 2937 - 2943
Опубликована: Авг. 11, 2022
Concentration
polarization
(CP)
is
a
ubiquitous
phenomenon
in
membrane
separation
that
possibly
responsible
for
the
decline
overall
efficiency.
However,
no
quantitative
connection
between
key
parameters
and
degree
of
CP
has
been
established.
In
this
study,
variation
permselectivity
during
was
comprehensively
elucidated
using
isostructural
covalent
organic
framework
(COF)
membranes
with
varied
charge
densities.
A
volcano-like
plot
output
power
density
against
population
obtained,
contrast
to
conventional
presumptions
regarding
an
increase
leading
enhancement
permselectivity,
consequent
osmotic
voltage.
The
CP-induced
detrimental
effects
were
considerably
mitigated
by
imposing
temperature
gradient
on
solutions,
which
led
thermophoretic
mobility
ions.
reverse
electrodialysis
(RED)
device
alleviated
yielded
up
24.7
mW
cm–2
difference
∼40
K;
value
far
exceeds
commercial
benchmark,
thus
establishing
new
criterion
RED
batteries.
These
results
outline
previously
undiscovered
benefit
linking
thermoelectric
conversion
realize
advanced
energy-conversion
technologies.
ACS Nano,
Год журнала:
2022,
Номер
16(11), С. 17613 - 17640
Опубликована: Ноя. 2, 2022
Design
elements
extracted
from
biological
ion
channels
guide
the
engineering
of
artificial
nanofluidic
membranes
for
efficient
ionic
transport
and
spawn
biomimetic
devices
with
great
potential
in
many
cutting-edge
areas.
In
this
context,
polymeric
can
be
especially
attractive
because
their
inherent
flexibility
benign
processability,
which
facilitate
massive
fabrication
facile
device
integration
large-scale
applications.
Herein,
state-of-the-art
achievements
are
systematically
summarized.
Theoretical
fundamentals
underlying
both
synthetic
introduced.
The
advances
then
detailed
aspects
structural
design,
material
construction,
chemical
functionalization,
emphasizing
broad
reticular/topological
variety
as
well
considerable
property
tunability.
After
that,
Review
expands
on
examples
evolving
these
into
macroscopic
potentials
addressing
compelling
issues
energy
conversion
storage
systems
where
is
highly
desirable.
Finally,
a
brief
outlook
possible
future
developments
field
provided.
Journal of the American Chemical Society,
Год журнала:
2023,
Номер
145(16), С. 9198 - 9206
Опубликована: Апрель 17, 2023
Aryl-ketone
derivatives
have
been
acknowledged
as
promising
organic
photocatalysts
for
photosynthesis.
However,
they
are
limited
by
their
photostability
and
less
explored
photoinduced
electron
transfer
(PET)
applications.
Herein
we
demonstrate
a
novel
strategy
to
cover
the
shortage
of
aryl-ketone
control
photoreactivity
implanting
symmetric
aryl
ketones
into
conjugated
covalent
frameworks
(COFs).
To
prove
concept,
three
comparative
materials
with
same
topology
varied
electronic
structures
were
built,
adopting
truxenone
knot
functionalized
terephthalaldehyde
linkers.
Spectroscopic
investigation
excited
carrier
dynamics
analysis
disclosed
improvements
in
efficiency
well
structure-performance
relationships
toward
N-aryl
tetrahydroisoquinoline
oxidation.
This
system
provides
robust
rule
thumb
designing
new-generation
photocatalysts.
Angewandte Chemie International Edition,
Год журнала:
2023,
Номер
63(6)
Опубликована: Ноя. 28, 2023
Ion-selective
membranes
are
crucial
in
various
chemical
and
physiological
processes.
Numerous
studies
have
demonstrated
progress
separating
monovalent/multivalent
ions,
but
efficient
monovalent/monovalent
ion
sieving
remains
a
great
challenge
due
to
their
same
valence
similar
radii.
Here,
this
work
reports
two-dimensional
(2D)
MXene
membrane
with
super-aligned
slit-shaped
nanochannels
ultrahigh
monovalent
selectivity.
The
is
prepared
by
applying
shear
forces
liquid-crystalline
(LC)
dispersion,
which
conducive
the
highly-ordered
stacking
of
nanosheets.
obtained
LC
(LCMM)
exhibits
selectivities
toward
Li
