Molecules,
Год журнала:
2023,
Номер
28(24), С. 8151 - 8151
Опубликована: Дек. 18, 2023
Porous
covalent
organic
frameworks
(COFs)
have
been
widely
used
for
the
efficient
removal
of
iodine
from
solution
due
to
their
abundance
electron-rich
sites.
In
this
study,
two
kinds
ketoenamine-based
COFs,
TpBD-(OMe)2
and
TpBD-Me2,
are
successfully
synthesized
via
Schiff
base
reaction
under
solvothermal
conditions
using
1,
3,
5-triformylphoroglucinol
as
aldehyde
monomer,
o-tolidine
o-dianisidine
amino
monomers.
The
ability
TpBD-Me2
adsorb
in
cyclohexane
or
aqueous
solutions
has
quantitatively
analyzed
interpreted
terms
adsorption
possesses
sites,
-NH-
-C=O,
exhibits
an
capacity
681.67
mg/g
cyclohexane,
with
initial
rate
0.6
g/mol/min
respect
COF
unit
cell.
can
be
high
728.77
mg/g,
reach
1.2
presence
oxygen
atoms
between
methyl
group
benzene
ring.
Compared
higher
towards
not
only
reflected
solvents,
but
also
solutions.
It
is
proven
through
X-ray
photoelectron
spectroscopy
Raman
that
exists
form
I2,
I3-,
I5-
within
after
adsorption.
This
work
expands
application
COFs
field
adsorption,
provides
research
ideas
important
experimental
basis
optimization
Abstract
Metal‐organic
frameworks
(MOFs)
are
a
new
variety
of
solid
crystalline
porous
functional
materials.
As
an
extension
inorganic
materials,
it
has
made
important
progress
in
preparation
and
application.
MOFs
widely
used
various
fields
such
as
gas
adsorption
storage,
drug
delivery,
sensing,
biological
imaging
due
to
their
high
specific
surface
area,
porosity,
adjustable
pore
size,
abundant
active
sites,
modification
by
introducing
groups.
In
this
paper,
the
types
classified,
synthesis
methods
mechanisms
materials
summarized.
Finally,
application
prospects
challenges
metal‐organic
framework
biomedical
field
discussed,
hoping
promote
multidisciplinary
fields.
ACS Applied Materials & Interfaces,
Год журнала:
2023,
Номер
15(29), С. 35082 - 35091
Опубликована: Июль 17, 2023
This
study
aimed
to
develop
effective
adsorbents
for
capturing
radioactive
iodine
in
nuclear
power
waste
gas.
Two
zinc
metal-organic
frameworks
(Zn-MOFs)
were
synthesized
and
found
have
favorable
properties
such
as
a
large
surface
area,
thermal
stability,
rich
π-electron-containing
nitrogen,
redox
potential.
Adsorption
experiments
revealed
maximum
capacities
of
1.25
1.96
g
g-1
the
MOFs
at
75
°C,
with
pseudo-second-order
kinetic
model
fitting
data
well.
The
Langmuir
equation
provided
better
fit
cyclohexane,
adsorption
amounts
249
358
mg
Zn-MOF-1
Zn-MOF-2,
respectively.
also
stable
during
six
cycles
desorption.
Furthermore,
electron
transfer
occurred
due
synergistic
Zn,
N,
O
atoms,
resulting
conversion
some
polyiodide.
Zn-MOF-2
exhibited
chemisorption
than
smaller
highest
occupied
molecular
orbital
(HOMO)-lowest
unoccupied
(LUMO)
gap.
Notably,
it
was
discovered
that
N-containing
radicals
had
stronger
interactions
compared
without
N.
These
findings
provide
valuable
insights
into
MOF
synthesis
environmental
protection.
ACS Applied Nano Materials,
Год журнала:
2023,
Номер
6(19), С. 18177 - 18187
Опубликована: Сен. 26, 2023
With
the
rapid
development
of
nuclear
industry,
effective
treatment
radioactive
iodine
has
become
an
urgent
and
challenging
task.
In
this
article,
we
synthesized
a
nanoporous
nitrogen-rich
covalent
organic
framework
(TTA-DMTP-COF)
with
specific
surface
area
up
to
2332
m2/g
for
adsorption
(I2)
methyl
iodide
(CH3I).
Adsorption
experiments
showed
that
TTA-DMTP-COF
exhibited
I2
CH3I
properties;
maximum
capacity
is
as
high
2.59
g·g–1,
1.60
g·g–1.
addition,
can
effectively
adsorb
from
iodine–cyclohexane
solution,
amount
516.46
mg/g.
Mechanistic
studies
have
shown
enter
nanopores
COF
materials
form
charge
transfer
complexes
various
functional
groups
in
(including
imines,
triazine
moieties,
residual
amino
groups).
The
N-methylation
reaction
specifically
binds
nucleophilic
N
site
generates
polyiodides
during
process.
Our
work
demonstrates
excellent
candidate
material
capable
capturing
air
solution
harsh
environments.
Inorganic Chemistry,
Год журнала:
2024,
Номер
63(45), С. 21541 - 21547
Опубликована: Окт. 30, 2024
Efficient
capture
of
radioiodine
is
essential
for
the
protection
ecological
environment
and
sustainable
development
nuclear
energy
generation.
Metal–organic
frameworks
(MOFs)
their
derivatives
provide
alternative
potential
overcoming
limitations
traditional
iodine
adsorbents.
Herein
this
work,
imidazole
(Im)
dispersed
into
a
robust
mesoporous
zirconium
MOF
PCN-222
by
heat
deposition
method,
forming
high-uniformity
composite
Im@PCN-222.
The
large
pore
size
marked
chemical
resistance
skeleton
allow
incorporation
Im
to
reach
43
wt
%
while
surviving
corrosion
activated
Im.
nearly
saturated
loading
significantly
benefits
sorption
capability
toward
gives
rise
an
exceptional
adsorption
capacity
10.04
g
g–1
excellent
recyclability.
This
value
higher
than
that
most
MOFs
derivatives.
Further,
was
also
successfully
deposited
onto
functionalized
porous
Al2O3
ceramic
filtration
membrane,
which
endowed
hybrid
membrane
with
efficient
separation
properties.
work
highlights
new
strategy
fabrication
MOF-based
as
well
composite-based
filters.
