Advanced Science,
Journal Year:
2025,
Volume and Issue:
unknown
Published: May 28, 2025
Abstract
It
is
a
considerable
challenge
to
selectively
recycle
precious
metals
from
industrial
wastewater
and
natural
waters.
Herein,
carbon
aerogels
embedded
with
magnetic
Fe@FeS@C
nanoparticles
(CFeS
aerogels)
were
constructed
carrageenan.
The
unique
redox
potential
of
FeS,
coupled
the
barrier
effect
electron
conduction
property
layer,
made
exhibited
ultra‐high
ion
selectivity.
resultant
CFeS
can
adsorb
reduce
trace
Au(III),
Ag(I),
Pd(II)
ions
at
ppb
level
in
an
aqueous
solution
29
coexisting
cations.
Even
if
concentration
competing
metal
100‐fold
higher
than
those
ions,
selectivity
for
remained
above
99.2%.
Moreover,
3D
network
immobilizing
prevented
aggregation
detachment
recycled
metals,
thereby
enhancing
adsorption
rate
capacity.
rapidly
achieved
equilibrium
5–10
min,
have
saturated
capacities
321.2
mg·g
−1
,
150.6
70.1
respectively.
Such
selectivity,
high
efficiency,
easy
separation
provided
practical
strategy
enrichment
recovery
metals.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
36(33)
Published: June 19, 2024
The
recovery
of
precious
metals
(PMs)
from
secondary
resources
has
garnered
significant
attention
due
to
environmental
and
economic
considerations.
Covalent
organic
frameworks
(COFs)
have
emerged
as
promising
adsorbents
for
this
purpose,
owing
their
tunable
pore
size,
facile
functionalization,
exceptional
chemical
stability,
large
specific
surface
area.
This
review
provides
an
overview
the
latest
research
progress
in
utilizing
COFs
recover
PMs.
Firstly,
design
synthesis
strategies
chemically
stable
COF-based
materials,
including
pristine
COFs,
functionalized
composites,
are
delineated.
Furthermore,
application
gold,
silver,
platinum
group
elements
is
delved
into,
emphasizing
high
adsorption
capacity
selectivity
well
recycling
ability.
Additionally,
various
interaction
mechanisms
between
PM
ions
analyzed.
Finally,
current
challenges
faced
by
field
discussed,
potential
directions
future
development
proposed,
enhancing
recyclability
reusability
COF
materials
realizing
PMs
actual
acidic
wastewater.
With
targeted
can
be
realized
more
economically
efficiently
future.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Aug. 13, 2024
Abstract
Modulating
the
electronic
state
of
multicomponent
covalent
organic
framework
(COF)
electrocatalysts
is
crucial
for
enhancing
catalytic
activity.
However,
effect
dimensionality
on
their
physicochemical
functionalities
still
lacking.
Herein,
we
report
an
interlaced
unsaturated
2D
and
saturated
3D
strategy
to
develop
multicomponent‐regulated
COFs
with
tunable
gradient
high
selectivity
activity
electrocatalysis.
Compared
two‐component
model
COFs,
2D/3D
locally
irregular
dimensions
structures
are
more
practical
in
optimizing
intrinsic
electrode
surface
reaction
mass
transfer.
Remarkably,
2D‐inserted
TAE‐COF
regulates
adsorption
mode
OOH*
species
supply
a
favorable
dynamic
pathway
H
2
O
process,
thereby
achieving
excellent
production
rate
8.50
mol
g
cat
−1
h
.
Moreover,
utilizing
theoretical
calculation
situ
ATR‐FTIR
experiment,
found
that
central
carbon
atom
tetraphenyl‐based
unit
(site‐1
site‐6)
potential
active
sites.
This
operating
ability
reactants
dimensionality‐interconnected
building
blocks
provides
idea
designing
durable
efficient
electrocatalysts.
Journal of the American Chemical Society,
Journal Year:
2024,
Volume and Issue:
146(28), P. 19425 - 19433
Published: July 1, 2024
The
effective
separation
of
aromatic
and
aliphatic
hydrocarbons
remains
a
notable
challenge
in
the
petrochemical
industry.
Herein,
we
report
self-healing
three-dimensional
B
←
N-based
hydrogen-bonded
organic
framework
(HOF),
BN-HOF-1,
constructed
from
discrete
N
inclusive
dimers
through
weak
C–H···F
C–H···N
hydrogen-bonding
interactions.
To
make
use
specific
recognition
for
toluene
molecules
reversible
ad/desorption
nature
this
novel
HOF,
BN-HOF-1
can
exclusively
recognize
separate
mixtures
toluene-methylcyclohexane,
thus
generating
99.6%
pure
its
after
gentle
heating,
recorded
value
among
any
reported
materials
purification.
After
were
released
framework,
it
becomes
condensed
BN-HOF-1a,
which
be
further
reused
highly
selective
purification
binary
mixtures,
structural
recovery
back
to
BN-HOF-1.
Single-crystal
X-ray
diffraction
molecular
modeling
studies
reveal
that
high
is
attributed
complementary
electrostatic
potential
between
host
guest
toluene,
while
HOF
intermolecular
Small,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 11, 2024
Abstract
Reversible
and
recyclable
thermosets
have
garnered
increasing
attention
for
their
smart
functionality
sustainability.
However,
they
still
face
challenges
in
balancing
comprehensive
performance
dynamic
features.
Herein,
silicon
(Si)─oxygen
(O)
imidazole
units
covalent
bonds
are
coupled
to
generate
a
new
class
of
bio‐polyimines
(Bio‐Si‐PABZs),
endow
them
with
high
excellent
reprocessing
capability
acid‐degradability.
By
tailoring
the
molar
content
diamines,
this
Bio‐Si‐PABZs
displayed
both
markedly
glass
transition
temperature
(162
°C)
char
yield
at
800
°C
an
oxygen
atmosphere
(73.1%).
These
favorable
properties
outperformed
various
previously
reported
polyimines
competed
effectively
commercial
fossil‐based
polycarbonate.
Moreover,
scratch
(≈10
µ
m)
on
surface
samples
can
be
self‐healing
within
only
2
min,
effective
“
Bird
Nest
”‐to‐“
Torch
”
recycling
also
achieved
through
free
amines
solution.
Most
importantly,
bio‐based
siloxane
adhesive
derived
from
intermediate
Bio‐Si‐PABZ‐1
by
acidic
degradation
demonstrated
broad
robust
adhesion
substrates,
values
reaching
up
≈3.5
MPa.
For
first
time,
study
lays
scientific
groundwork
designing
polyimine
Si─O
units,
as
well
converting
plastic
wastes
into
thermal‐reversibility
renewable
adhesives.
