JACS Au,
Год журнала:
2022,
Номер
2(2), С. 322 - 327
Опубликована: Янв. 19, 2022
Materials
and
processes
for
chemical
separations
must
be
used
in
complex
environments
to
have
an
impact
many
practical
settings.
Despite
these
complexities,
much
research
on
has
focused
idealized
mixtures.
In
this
paper,
we
suggest
that
communities
specific
should
develop
well-defined
exemplar
mixtures
bridge
the
gap
between
fundamental
studies
applications
provide
a
hierarchical
framework
of
purpose.
We
illustrate
hierarchy
with
examples,
including
CO2
capture,
capture
uranium
from
seawater,
electrocatalytic
reactions,
among
others.
conclude
four
recommendations
community
accelerate
development
innovative
strategies
pressing
real-world
challenges.
Angewandte Chemie International Edition,
Год журнала:
2021,
Номер
61(15)
Опубликована: Дек. 17, 2021
Green
carbon
science
is
defined
as
the
"study
and
optimization
of
transformation
carbon-containing
compounds
relevant
processes
involved
in
entire
cycle
from
resource
processing,
energy
utilization,
CO2
fixation,
recycling
to
utilize
resources
efficiently
minimize
net
emission."[1]
related
closely
neutrality,
fields
have
developed
quickly
last
decade.
In
this
Minireview,
we
propose
concept
index,
recent
progress
petroleum
refining,
production
liquid
fuels,
chemicals,
materials
using
coal,
methane,
,
biomass,
waste
plastics
highlighted
combination
with
green
science.
An
outlook
for
these
important
provided
final
section.
Science,
Год журнала:
2022,
Номер
378(6617), С. 308 - 313
Опубликована: Окт. 20, 2022
High-performance
pervaporation
membranes
have
potential
in
industrial
separation
applications,
but
overcoming
the
permeability-selectivity
trade-off
is
a
challenge.
We
report
strategy
to
create
highly
flexible
metal-organic
framework
nanosheet
(MOF-NS)
with
faveolate
structure
on
polymer
substrates
for
alcohol-water
separation.
The
controlled
growth
followed
by
surface-coating
method
effectively
produced
and
defect-free
superhydrophobic
MOF-NS
membranes.
reversible
deformation
of
vertical
interlamellar
pathways
were
captured
electron
microscopy.
Molecular
simulations
confirmed
revealed
transport
mechanism.
ultrafast
channels
exhibited
an
ultrahigh
flux
factor
8.9
5
weight
%
ethanol-water
at
40°C,
which
can
be
used
biofuel
recovery.
polydimethylsiloxane
synergistically
contribute
performance.
Nature Materials,
Год журнала:
2022,
Номер
21(4), С. 463 - 470
Опубликована: Янв. 10, 2022
Membranes
with
high
selectivity
offer
an
attractive
route
to
molecular
separations,
where
technologies
such
as
distillation
and
chromatography
are
energy
intensive.
However,
it
remains
challenging
fine
tune
the
structure
porosity
in
membranes,
particularly
separate
molecules
of
similar
size.
Here,
we
report
a
process
for
producing
composite
membranes
that
comprise
crystalline
porous
organic
cage
films
fabricated
by
interfacial
synthesis
on
polyacrylonitrile
support.
These
exhibit
ultrafast
solvent
permeance
rejection
dyes
weights
over
600
g
mol-1.
The
film
is
dynamic,
its
pore
aperture
can
be
switched
methanol
generate
larger
pores
provide
increased
higher
weight
cut-offs
(1,400
mol-1).
By
varying
water/methanol
ratio,
between
two
phases
have
different
selectivities,
single,
'smart'
membrane
perform
graded
sieving.
We
exemplify
this
separating
three
single-stage,
single-membrane
process.
Nature,
Год журнала:
2022,
Номер
609(7925), С. 58 - 64
Опубликована: Авг. 31, 2022
Abstract
Polymer
membranes
are
widely
used
in
separation
processes
including
desalination
1
,
organic
solvent
nanofiltration
2,3
and
crude
oil
fractionation
4,5
.
Nevertheless,
direct
evidence
of
subnanometre
pores
a
feasible
method
manipulating
their
size
is
still
challenging
because
the
molecular
fluctuations
poorly
defined
voids
polymers
6
Macrocycles
with
intrinsic
cavities
could
potentially
tackle
this
challenge.
However,
unfunctionalized
macrocycles
indistinguishable
reactivities
tend
towards
disordered
packing
films
hundreds
nanometres
thick
7–9
hindering
cavity
interconnection
formation
through-pores.
Here,
we
synthesized
selectively
functionalized
differentiated
that
preferentially
aligned
to
create
well-defined
across
an
ultrathin
nanofilm.
The
ordered
structure
was
enhanced
by
reducing
nanofilm
thickness
down
several
nanometres.
This
orientated
architecture
enabled
visualization
macrocycle
surfaces,
tailored
ångström
precision
varying
identity.
Aligned
provided
twice
methanol
permeance
higher
selectivity
compared
counterparts.
Used
high-value
separations,
exemplified
here
enriching
cannabidiol
oil,
they
achieved
one
order
magnitude
faster
ethanol
transport
threefold
enrichment
than
commercial
state-of-the-art
membranes.
approach
offers
strategy
for
creating
channels
polymer
membranes,
demonstrates
potential
accurate
separations.
Nature Communications,
Год журнала:
2023,
Номер
14(1)
Опубликована: Май 12, 2023
The
lack
of
high-performance
and
substantial
supply
anion-exchange
membranes
is
a
major
obstacle
to
future
deployment
relevant
electrochemical
energy
devices.
Here,
we
select
two
isomers
(m-terphenyl
p-terphenyl)
balance
their
ratio
prepare
with
well-connected
uniformly-distributed
ultramicropores
based
on
robust
chemical
structures.
display
high
ion-conducting,
excellent
barrier
properties,
stability
exceeding
8000
h
at
80
°C
in
alkali.
assembled
present
desirable
combination
performance
durability
several
storage
devices:
neutral
aqueous
organic
redox
flow
batteries
(energy
efficiency
77.2%
100
mA
cm-2,
negligible
permeation
redox-active
molecules
over
1100
h),
water
electrolysis
(current
density
5.4
A
cm-2
1.8
V,
90
°C,
3000
fuel
cells
(power
1.61
W
under
catalyst
loading
0.2
mg
open-circuit
voltage
test
1000
h).
As
demonstration
upscaled
production,
the
achieve
roll-to-roll
manufacturing
width
greater
than
mm.
