Journal of Polymer Science,
Год журнала:
2024,
Номер
62(19), С. 4527 - 4537
Опубликована: Июль 17, 2024
Abstract
In
this
work,
two
novel
pyrimidine‐cored
covalent
organic
frameworks
TpTap‐COF
and
TpTan‐COF
were
synthesized
for
the
first
time
used
adsorption
of
heavy
metal
ions
in
aqueous
solution.
Both
COFs
are
nanofiber
clusters
with
preferable
crystallinity
thermal
stability.
The
impact
parameters
such
as
pH
value,
shaking
time,
initial
concentration,
temperature
studied
by
batch
experiments
multi‐metal
system.
six
onto
follows
pseudo‐second‐order
kinetic
model
Freundlich
isotherm
model,
which
is
a
chemical
process
that
occurs
on
non‐uniform
surfaces.
rate
determined
both
film
diffusion
intraparticle
diffusion.
Further
research
copper
indicates
formation
complexes
between
O#N#N/O#O
chelating
sites
COF
skeleton
Cu
through
sharing
lone
pair
electrons.
Scientific Reports,
Год журнала:
2025,
Номер
15(1)
Опубликована: Апрель 21, 2025
Ionic
covalent
organic
polymers
are
promising
water
pollutant
adsorbents
with
enhanced
adsorption
potential
compared
to
their
neutral
counterparts
benefiting
from
both
electrostatic
attractions
and
the
ion-exchange
process.
This
work
deals
construction
of
a
cationic
COP
through
facile
direct
approach
assessment
its
performance
for
scavenging
Direct
Scarlet
4BS
(DS-4BS)
anionic
dye.
Many
analytical
techniques
including
FT-IR,
TGA,
BET,
XRD,
zeta
potential,
FE-SEM/EDS
were
conducted
validate
this
polymer
formation.
As
results
revealed
maximum
capacity
(qmax)
was
obtained
236.4
mg/g
under
pH
=
2,
adsorbent
quantity
0.005
g,
dye
concentration
250
ppm,
time
3.5
h.
Based
on
regression
coefficient
(R2)
values,
experimental
data
suitably
matched
Langmuir
model,
indicating
monolayer
best-fitted
kinetics
model
pseudo-second-order.
Also,
according
calculated
energy
(Ea
4.5
kJ/mol),
mechanism
mainly
governed
by
physisorption
Additionally,
thermodynamic
investigations
that
negative
values
standard
free
Gibb's
(∆G0),
process
is
spontaneous.
positive
value
enthalpy
(∆H0
38.5
kJ/mol)
indicated
endothermic
nature
adsorption,
which
means
increases
increase
in
temperature.
