ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(10), С. 13060 - 13070
Опубликована: Март 4, 2024
Hierarchical
structure
and
surface
topography
play
pivotal
roles
in
developing
high-performance
solar-driven
evaporators
for
clean
water
production;
however,
there
exists
a
notable
gap
research
addressing
simultaneous
modulation
of
internal
microstructure
hydrogels
to
enhance
both
solar
steam
generation
performance
desalination
efficiency.
Herein,
anisotropic
poly(vinyl
alcohol)/MXene
composite
efficient
evaporation
wastewater
purification
are
fabricated
using
template-assisted
directional
freezing
approach
followed
by
precise
wettability
modulation.
The
resultant
exhibit
vertically
oriented
channels
that
ensure
fast
supply
during
evaporation,
their
alcohol)
skeletons
can
reduce
the
vaporization
enthalpy
hydrogels.
incorporation
MXene
sheets
enables
light
absorption
solar-thermal
conversion
while
providing
structural
reinforcement
More
importantly,
as-created
undulating
surface,
featuring
modulated
hydrophilic
troughs
hydrophobic
crests,
significantly
enhances
solar–thermal
efficiency,
thereby
boosting
performances.
As
result,
hydrogel-based
evaporator
exhibits
an
impressive
rate
2.55
kg
m–2
h–1
under
1
sun
irradiation,
coupled
with
long-term
durability
stability.
Notably,
outstanding
mechanical
robustness
hydrogel
further
high
portability
through
readily
achievable
process
reversible
dehydration/hydration.
Abstract
Solar
desalination
using
hydrogel
evaporators
is
an
eco‐friendly,
highly
efficient
means
with
natural
sunlight
for
sustainable
freshwater
production.
However,
it
remains
challenging
to
develop
a
cost‐effective
and
scalable
method
prepare
salt‐resistant
stable
desalination.
Here,
inspired
by
tree
transpiration
hierarchical
porous
structure,
3D‐printed
bionic
evaporator
(3DP‐BHE)
designed
long‐term
solar
Commercialized
activated
carbon
(AC)
introduced
into
biomass
starch
skeleton
as
light
absorber
build
3DP‐BHE
in
fashion
($10.14
m
−2
of
total
materials
cost).
The
leaf
layer
94.01%
absorption
timely
vapor
diffusion.
trunk
3D
printed
bimodal
structure
water
transfer,
thermal
isolation,
salt
ions
convection
With
the
unique
achieves
evaporation
rate
2.13
kg
h
−1
at
≈90.5%
energy
efficiency
under
one
sun
(1
kW
).
During
7‐day
10
wt.%
brine,
steady
1.98
maintained
record‐high
cost‐effectiveness
(195.3
g
$
)
manner.
This
will
open
significant
opportunities
affordable
systems
on
multiple
scales,
from
individual
households
off‐grid
communities.
Advanced Functional Materials,
Год журнала:
2024,
Номер
34(29)
Опубликована: Март 15, 2024
Abstract
Optimizin
the
efficient
light‐trapping
in
photothermal
conversion
by
enhancing
localized
surface
plasmon
resonance
(LSPR)
is
crucial
improving
light‐heat‐conversion
efficiency
of
Ti
3
C
2
T
x
MXene.
However,
its
susceptibility
to
oxidation
makes
it
prone
oxides
formation,
diminishing
metallic
properties
and
significantly
reducing
LSPR
effect.
This
work
synthesizes
a
kind
air‐stable
hybrid
MXenes
synergistic
densification
strategy
that
incorporates
sulfhydryl‐bonding
between
organic
inorganic
parts
reacting
MXene
with
thiocarboxylic
acids.
The
resultant
shortening
electron
transport
pathways,
enhanced
charge
density,
generation
additional
electronic
states
around
Fermi
level
collectively
contribute
an
augmented
Additionally,
also
demonstrate
high‐temperature
resistance
reduced
water
interactions.
These
combined
effects
substantially
elevate
through
acids
modification,
reaching
evaporation
rate
1.77
kg
m
−2
h
−1
94.56%
MXenes.
approach
paves
way
for
design
development
three‐in‐one
conversion.
Solar
desalination
driven
by
interfacial
heating
is
considered
a
promising
technique
to
alleviate
the
freshwater
shortage
crisis.
However,
its
further
extension
and
application
are
confined
factors
such
as
highlighted
salt
accumulation,
inferior
energy
efficiency,
poor
durability.
Herein,
microsized
eutectic
gallium–indium
(EGaIn)
core–shell
nanodroplet
(denoted
LMTE)
with
photo-cross-linking
photothermal
traits,
stabilized
allyl
glycidyl
ether
(AGE)-grafting
tannic
acid
(TA),
explored
solar
absorber
for
broadband
light
absorbing
localized
micro-nano
heat
channeling.
The
LMTE
nanodroplets
formulated
directly
highly
hydrated
polymers
photosensitive
species
successfully
develop
water-based
ink
suitable
digital
processing
(DLP)
3D
printing.
As
demonstration,
composite
hydrogel-forged
milli-conical
needle
arrays
metal-phenolic
network
(MPN)-engineered
wettability
enhancement
can
be
printed
designed
rationally
via
bottom-up
strategy.
3D-printing
hydrogel
evaporator
composed
of
spectrum-tailored
EGaIn
efficient
photon
harvesting
MPN-coated
milli-cone
water
supplying
channeling,
which
function
cooperatively
bestow
superior
solar-powered
evaporation
(2.96
kg
m–2
h–1,
96.93%
efficiency)
excellent
(salt
cycle
site-specific
crystallization).
Furthermore,
robust
steam
generating/collecting
system
demonstrated,
providing
valuable
guidance
building
water-energy-agriculture
nexus.
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(10), С. 13060 - 13070
Опубликована: Март 4, 2024
Hierarchical
structure
and
surface
topography
play
pivotal
roles
in
developing
high-performance
solar-driven
evaporators
for
clean
water
production;
however,
there
exists
a
notable
gap
research
addressing
simultaneous
modulation
of
internal
microstructure
hydrogels
to
enhance
both
solar
steam
generation
performance
desalination
efficiency.
Herein,
anisotropic
poly(vinyl
alcohol)/MXene
composite
efficient
evaporation
wastewater
purification
are
fabricated
using
template-assisted
directional
freezing
approach
followed
by
precise
wettability
modulation.
The
resultant
exhibit
vertically
oriented
channels
that
ensure
fast
supply
during
evaporation,
their
alcohol)
skeletons
can
reduce
the
vaporization
enthalpy
hydrogels.
incorporation
MXene
sheets
enables
light
absorption
solar-thermal
conversion
while
providing
structural
reinforcement
More
importantly,
as-created
undulating
surface,
featuring
modulated
hydrophilic
troughs
hydrophobic
crests,
significantly
enhances
solar–thermal
efficiency,
thereby
boosting
performances.
As
result,
hydrogel-based
evaporator
exhibits
an
impressive
rate
2.55
kg
m–2
h–1
under
1
sun
irradiation,
coupled
with
long-term
durability
stability.
Notably,
outstanding
mechanical
robustness
hydrogel
further
high
portability
through
readily
achievable
process
reversible
dehydration/hydration.
