Abatement of Indoor Formaldehyde Vapor via Sequential Adsorption and Photocatalytic Degradation over HKUST-1@TiO2 Nanocomposites
Industrial & Engineering Chemistry Research,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 7, 2025
Язык: Английский
Assessing Hydrolysis Performance of Ce(OH)4@PIM-1 Composites Functionalized with Amidoxime, Aldoxime, and Carboxylate Groups Toward Dimethyl 4-Nitrophenylphosphonate, a Nerve Agent Simulant
ACS Applied Polymer Materials,
Год журнала:
2024,
Номер
6(7), С. 3645 - 3653
Опубликована: Март 14, 2024
In
recent
years,
significant
attention
has
been
directed
toward
evaluating
the
reactivity
of
diverse
polymers
to
gauge
their
catalytic
activity
against
hazardous
chemicals.
Among
these
polymers,
PIM-1
emerged
as
an
exceptional
candidate
due
its
noteworthy
attributes
including
high
surface
area,
excellent
solubility,
and
capability
fine-tune
nitrile
functional
groups
along
polymeric
backbone.
this
study,
we
explored
impact
different
groups,
such
amidoxime
(AX),
aldoxime
(OX),
carboxylate
(COOH),
on
degradation
dimethyl
4-nitrophenylphosphonate
(DMNP)
in
comparison
pure
respective
Ce(OH)4-loaded
polymer
composites.
Remarkably,
PIM-1-AX
analog
exhibited
highest
degree
(ca.
100%)
among
investigated
under
24
h,
nucleophilicity,
whereas
1
Ce(OH)4@PIM-1-COOH
outperformed
other
materials
by
displaying
initial
hydrolysis
rate
0.058
μmol/s
a
half-time
0.38
min,
account
Lewis
acidity,
stemming
from
Ce4+
coupled
with
Bronsted
carboxylic
acid.
Overall,
findings
study
highlight
influence
acid
pairs
promoting
DMNP
kinetics,
providing
alternative
pathway
commonly
used
nucleophilic
substitution
method.
Язык: Английский
Liquid-Phase Adsorption of Dimethyl Methylphosphonate on Poly(ether imide) and its Metal Hydroxide-Integrated Composites
Industrial & Engineering Chemistry Research,
Год журнала:
2024,
Номер
63(18), С. 8319 - 8329
Опубликована: Апрель 25, 2024
Understanding
the
adsorption
behavior
of
dimethyl
methylphosphonate
(DMMP),
a
key
simulant
for
some
nerve
agents,
is
crucial
developing
effective
protective
measures
and
ensuring
environmental
safety
against
harmful
chemical
warfare
agents.
This
study
systematically
explores
liquid-phase
DMMP
over
branched
poly(ether
imide)
(Ultem)
its
Ce(OH)4/Zr(OH)4
metal
hydroxide
composites.
Utilizing
UV–visible
(UV–vis)
spectroscopy,
process
was
monitored
time
to
analyze
interplay
between
various
Ultem-based
composites
molecules.
Nonreactive
Ultem
materials
were
experimentally
identified
as
suitable
adsorbents
capture,
providing
novel
avenue
filtration
technologies.
It
found
that
incorporating
30
wt
%
Ce(OH)4
into
yields
highest
uptake,
reaching
an
impressive
capacity
10.20
mmol
g–1
at
room
temperature
(i.e.,
22
±
1
°C).
Furthermore,
Ce(OH)4-coated
composite
demonstrated
fastest
kinetic
response
(0.39
min–1)
across
all
samples.
Our
results
revealed
combined
physisorption–chemisorption
mechanism
adsorbents.
After
three
adsorption–desorption
cycles,
retained
their
>93%
efficiency.
These
findings
are
significant
in
revealing
underlying
factors
govern
materials,
offering
insights
role
hydroxides
enhancing
properties.
research
has
implications
design
development
advanced
defense,
safety,
industry.
Язык: Английский