Journal of the American Chemical Society,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 3, 2025
Uranium
(U),
a
high-performing,
low-emission
energy
source,
is
driving
sustainable
economic
growth.
Herein,
we
synthesized
two
crystalline
phases
(HPOC-α
and
β)
by
an
unreported
amidoxime
organic
cage
used
for
uranium
capture.
The
revealed
crystal
structures
adsorption
test
showed
that
accessible
functional
groups
were
essential
to
uranyl
ions
sorption.
presented
in
HPOC-α
gifted
it
equilibrium
capacity
of
1682
mg
g–1
could
mostly
maintain
the
performance
after
adsorption–desorption
cycles.
In
natural
seawater,
exhibited
impressive
recovery
11.97
during
30
day
field
testing,
showing
potential
economically
practical
extraction
from
seawater.
ACS Nano,
Год журнала:
2024,
Номер
18(18), С. 11804 - 11812
Опубликована: Апрель 23, 2024
Nuclear
power
plays
a
pivotal
role
in
the
global
energy
supply.
The
adsorption-based
extraction
of
uranium
from
seawater
is
crucial
for
rapid
advancement
nuclear
power.
phosphorus
nitride
imide
(PN)
nanotubes
were
synthesized
this
study
using
solvothermal
method,
resulting
chemically
stable
cross-linked
tubular
hollow
structures
that
draw
inspiration
intricate
snowflake
fractal
pattern.
Detailed
characterization
showed
these
possess
uniformly
distributed
five-coordinated
nanopocket,
which
exhibited
great
selectivity
and
efficiency
binding
uranium.
PN
captured
97.34%
low
U-spiked
natural
(∼355
μg
L
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 20, 2025
Abstract
Functionalized
amidoxime
[AO,
R−C(NH
2
)═N(OH)]
is
widely
used
for
uranium
extraction
from
seawater,
but
increasing
the
effective
functional
sites
high
AO
utilization
in
adsorbents
remains
challenging.
This
study
introduces
a
hydrogen
bond
reconstruction
strategy
to
enhance
efficiency
of
AO‐modified
polyacrylonitrile
(PAN)
fibers
by
blending
with
polyvinyl
alcohol
(PVA).
The
PAN/PVA
are
synthesized
via
electrospinning,
followed
amidoximation
on
PAN
prepare
PAN‐AO/PVA
adsorbents.
These
materials
can
extract
uranyl
ions
uranyl‐carbonate
complex
achieving
an
adsorption
capacity
21.0
mg
g⁻¹
under
simulated
seawater
conditions
330
ppb
concentration
over
24
h.
PVA
increases
4
times
(from
1/291
1/69),
exceeding
most
reported
values.
adsorbent
also
shows
excellent
reusability,
retaining
95%
after
seven
adsorption–desorption
cycles.
Quantum‐chemical
studies
based
density
theory
reveal
that
modulates
bonding
network
shifting
intramolecular
bonds
PAN‐AO
intermolecular
ones
PVA,
permeability
and
exposing
more
active
N
O
sites.
Additionally,
PVA's
hydroxyl
groups
coordinate
UO₂
⁺,
enhancing
through
enthalpy‐entropy
synergy
relationship.
offers
practical
approach
improving
seawater.
Journal of the American Chemical Society,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 3, 2025
Uranium
(U),
a
high-performing,
low-emission
energy
source,
is
driving
sustainable
economic
growth.
Herein,
we
synthesized
two
crystalline
phases
(HPOC-α
and
β)
by
an
unreported
amidoxime
organic
cage
used
for
uranium
capture.
The
revealed
crystal
structures
adsorption
test
showed
that
accessible
functional
groups
were
essential
to
uranyl
ions
sorption.
presented
in
HPOC-α
gifted
it
equilibrium
capacity
of
1682
mg
g–1
could
mostly
maintain
the
performance
after
adsorption–desorption
cycles.
In
natural
seawater,
exhibited
impressive
recovery
11.97
during
30
day
field
testing,
showing
potential
economically
practical
extraction
from
seawater.
