Molecules,
Год журнала:
2024,
Номер
29(7), С. 1493 - 1493
Опубликована: Март 27, 2024
Developing
high−efficiency
membrane
materials
for
the
rapid
removal
of
organic
dyes
is
crucial
but
remains
a
challenge.
Polyoxometalates
(POMs)
clusters
with
anionic
structures
are
promising
candidates
cationic
via
electrostatic
interactions.
However,
their
shortcomings,
such
as
solubility
and
inability
to
be
mass−produced,
hinder
application
in
water
pollution
treatment.
Here,
we
propose
simple
green
strategy
utilizing
room
temperature
stirring
method
mass
produce
nanoscale
polyoxometalate−based
metal−organic
frameworks
(POMOFs)
porous
rhomboid−shaped
dodecahedral
hexagonal
prism
structures.
The
products
were
labeled
POMOF1
(POMOF-PW12)
POMOF2
(POMOF-PMo12).
Subsequently,
series
x
wt%
POMOF1/PAN
(x
=
0,
3,
5,
10)
nanofiber
membranes
(NFMs)
prepared
using
electrospinning
technology,
where
polyacrylonitrile
(PAN)
acts
“glue”
molecule
facilitating
bonding
nanoparticles.
as−prepared
samples
comprehensively
characterized
exhibited
obvious
stability,
well
selective
adsorption
filtration
performance
towards
dyes.
5
NFM
possessed
highest
efficiency
96.7%
RhB,
95.8%
MB,
86.4%
CV
dyes,
which
realized
separation
over
95%
positively
charged
from
mixed
solution.
mechanism
was
explained
FT−IR,
SEM,
Zeta
potential,
kinetics
model,
proved
that
determined
interaction,
hydrogen
bonding,
π–π
Moreover,
presented
an
outstanding
recoverable
stable
rate
after
four
cycles.
This
study
provides
new
direction
systematic
design
manufacture
properties
contaminant
removal.
ACS Applied Materials & Interfaces,
Год журнала:
2023,
Номер
15(27), С. 32903 - 32915
Опубликована: Июнь 28, 2023
Covalent
organic
frameworks
(COFs)
have
a
wide
application
prospect
in
wastewater
treatment
because
of
their
unique
structure
and
properties;
however,
the
preparation
pure
COF
membranes
remains
great
challenge
by
reason
insolubility
unprocessability
powders
formed
at
high
temperature
pressure.
In
this
study,
continuous
defect-free
bacterial
cellulose/covalent
framework
composite
membrane
was
prepared
using
cellulose
(BC)
porphyrin-based
with
structures
hydrogen
bonding
forces.
The
dye
rejection
rate
toward
methyl
green
congo
red
up
to
99%,
permeance
about
195
L
m-2
h-1
bar-1.
It
showed
excellent
stability
under
different
pH
conditions,
long-time
filtration,
cyclic
experimental
conditions.
addition,
hydrophilicity
surface
negativity
BC/COF
made
it
certain
antifouling
performance,
flux
recovery
can
reach
93.72%.
More
importantly,
exhibited
antibacterial
properties
due
doping
COF,
survival
rates
both
Escherichia
coli
Staphylococcus
aureus
were
less
than
1%
after
exposure
visible
light.
self-supporting
synthesized
strategy
also
has
outstanding
properties,
addition
separation
effects,
which
greatly
broaden
materials
water
treatment.
Nanomaterials,
Год журнала:
2023,
Номер
13(2), С. 336 - 336
Опубликована: Янв. 13, 2023
The
preparation
of
metal
organic
frameworks
(MOFs)
has
come
to
the
forefront
in
recent
years
because
their
outstanding
physical
and
chemical
properties.
Many
MOFs
such
as
Zn,
Co,
Ni,
Fe,
Ag,
etc.,
have
been
successfully
synthesized.
In
this
work,
we
followed
solvothermal
assisted
route
synthesize
Ag-MOF
(abbreviated
AMOF)
nanosheets
then
applied
them
a
photocatalyst
remove
different
pollutants,
namely
methyl
orange
(MO),
crystal
violet
(CV),
methylene
blue
(MB).
Chemical
composition,
optical
properties,
morphology,
microstructural
analysis
were
analyzed
using
XPS,
UV-visible
spectrophotometer,
FESEM,
TEM,
EDS,
respectively.
structural
properties
AMOF
studied
by
X-ray
diffraction
(XRD).
Nitrogen
adsorption
desorption
isotherm
utilized
evaluate
specific
surface
area
pore
size
nanosheets.
Further,
showed
notable
photocatalytic
performance
for
various
dye
pollutants
degradation.
results
confirmed
74.5,
85.5,
90.7%
MO,
CV,
MB
removal
after
120
min
irradiation
with
rate
constants
(k)
0.0123,
0.0153,
0.0158
min−1,
effect
superoxide
radicals
(O2−)
photogenerated
holes
(h+)
on
was
investigated
radical
scavenger
trapping
studies.
Moreover,
stability
study
also
recyclability
photocatalyst.
Therefore,
findings
research
present
realizable
method
grow
successful
degradation
pollutants.
Journal of Membrane Science,
Год журнала:
2023,
Номер
682, С. 121766 - 121766
Опубликована: Май 20, 2023
With
the
gradual
increase
of
microplastics
(MPs)
in
water
and
wastewater
streams,
it
is
imperative
to
investigate
their
removal
using
tertiary
treatment
systems
minimize
preferably
prevent
entrance
into
aquatic
environments.
Forward
osmosis
(FO)
a
non-pressurized
membrane
process
with
potential
applications
MPs
from
wastewater.
However,
efficient
application
FO
relies
on
developing
high-performance
membranes
low
fouling
tendency.
are
proven
as
emerging
foulants
systems,
diminishing
performance
lifetime
this
highlights
need
consider
MP
sustainable
membranes.
The
current
study
focuses
novel
modification
thin
film
composite
(TFC)
by
MIL-53(Fe)
water-stable
hydrophilic
metal-organic
framework.
Experimental
results
demonstrated
that
optimized
(0.2
wt%
MIL-53(Fe))
achieved
significantly
higher
flux
(90%
increase)
23%
less
reverse
salt
flux.
modified
also
had
decline
experiments
recovery
after
physical
cleaning
compared
control
affirming
its
antifouling
efficiency.
integration
substrate
proved
be
practical
method
for
TFC
improved
properties
against
organic
foulants.
Scientific Reports,
Год журнала:
2023,
Номер
13(1)
Опубликована: Сен. 4, 2023
Photocatalytic
degradation
under
ultra-low
powered
light
is
a
viable
advanced
oxidation
process
technique
against
extensive
emerging
contaminants.
As
new
and
remarkable
class
of
nanoporous
materials,
metal-organic
frameworks
(MOFs),
attract
interest
for
the
supreme
adsorptive
photocatalytic
functionalities.
An
outstanding
MOF,
MIL-101(Fe)
chosen
as
photocatalyst
template
synthesis
α-Fe2O3
by
simple
thermal
modification
to
improve
structural
properties
toward
methylene
blue
(MB)
eradication.
Octahedron-like
(Modified
MIL-101(Fe),
M-MIL-101(Fe))
was
superior
in
dispersion
separation
aqueous
medium.
Moreover,
catalytic
performance
increased
modified
form
~
7.3%
17.1%
compared
pristine
respectively.
Synergistic
improvement
MB
removal
achieved
simultaneous
adsorption/degradation
5-W
LED
irradiation.
Parametric
study
indicated
an
18.1%
44.5%
observed
increasing
pH
from
4
10,
M-MIL-101(Fe)
dose
0.2
1
g
L-1,
followed
pseudo-second-order
kinetics
model
efficiency
dropped
38%
concentration
5
20
mg
L-1.
Radical
trapping
tests
revealed
significant
role
[Formula:
see
text]
electron
radicals
major
participants
dye
degradation.
A
loss
reusability
that
good
further.
In
conclusion,
post-synthesis
on
improved
its
structural,
catalytic,
MB.
Scientific Reports,
Год журнала:
2024,
Номер
14(1)
Опубликована: Фев. 7, 2024
Abstract
This
study
was
deeply
focused
on
developing
a
novel
CTS/GO/ZnO
composite
as
an
efficient
adsorbent
for
CO
2
adsorption
process.
To
do
so,
design
of
experiment
(DOE)
done
based
RSM-BBD
technique
and
according
to
the
DOE
runs,
various
samples
were
synthesized
with
different
GO
loading
(in
range
0
wt%
20
wt%)
ZnO
nanoparticle’s
wt%).
A
volumetric
setup
used
investigate
effect
temperature
25–65
°C)
pressure
1–9
bar)
obtained
uptake
capability.
quadratic
model
developed
method
predict
capacity
sample
within
space.
In
addition,
process
optimization
conducted
optimum
values
GO,
ZnO,
temperature,
around
23.8
wt%,
18.2
30.1
°C,
8.6
bar,
respectively,
highest
470.43
mg/g.
Moreover,
isotherm
kinetic
modeling
Freundlich
(R
=
0.99)
fractional
order
most
appropriate
models,
respectively.
Also,
thermodynamic
analysis
∆H°,
∆S°,
∆G°
−
19.121
kJ/mol,
0.032
kJ/mol
K,
9.608
indicating
exothermic,
spontaneously,
physically
molecules
composite’s
surface.
Finally,
renewability
minor
loss
in
efficiency
about
4.35%
after
ten
cycles,
demonstrating
resulting
has
good
performance
robustness
industrial
capture
purposes.
