Nano Letters,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 13, 2025
Ruthenium
(Ru)-based
catalysts
are
active
in
catalyzing
polyethylene
(PE)
upcycling,
but
their
tendency
for
methanation
devalues
the
process.
Although
previous
works
confirmed
that
regulation
of
Ru
structure
can
inhibit
methane
yields,
mechanism
is
still
unclear,
and
catalytic
performance
remains
higher
upside
potential.
Herein,
we
synthesized
M-Ru/H-ZSM-5
(M
=
Pt,
Pd,
Rh)
PE
upcycling.
Pt-Ru/H-ZSM-5
had
better
conversion
(84.36%)
liquid
fuel
selectivity
(78.38%)
extremely
low
(8.43%),
which
be
ascribed
to
its
more
electron-deficient
Ruδ+
species
synergistic
effect
induced
by
Pt
doping.
Through
density
functional
theory
calculations,
nature
inhibition
was
uncovered
reaction
pathway
proposed.
Furthermore,
catalyst
demonstrated
stability
reusability,
as
well
efficacy
upcycling
various
PEs.
This
work
reveals
Ru-based
reactions,
promoting
plastic
recycling
development.
Chemical Engineering Journal,
Journal Year:
2024,
Volume and Issue:
481, P. 148560 - 148560
Published: Jan. 4, 2024
A
key
aspect
of
advancing
sustainable
membrane
technology
is
to
source
eco-friendly
polymers,
such
as
recycled
plastic
waste,
use
renewable
plant-based
solvents,
and
limit
the
number
solvents
used
in
dissolution-precipitation
processes.
In
this
study,
we
upcycle
polypropylene
PP
waste
into
bi-layered
microporous
superhydrophobic
membranes
using
a
single
solvent,
Cymene,
through
tandem
spin-casting
annealing.
The
surface
roughness
hydrophobicity
top
layer
enhance
selectivity,
while
presence
micropores
ensures
efficient
liquid
passage
high
permeability.
bottom
serves
substrate
for
layer,
providing
structural
support.
Various
annealing
conditions
were
employed
optimize
hydrophobicity,
roughness,
porosity
strength
as-prepared
membranes,
yielding
permeance
outstanding
separation
efficiency.
fabricated
subjected
oil–water
emulsion
separations,
demonstrating
contact
angle
exceeding
155°
123
nm,
resulting
an
organic
solvent
flux
14,000
Lm-2h−1
with
96
%
water
rejection.
Tensile
strain
found
be
13–28
MPa
20–27
%,
respectively.
This
research
provided
access
environmentally
friendly
adding
value
potential
benefits
both
polymer
industries
they
transition
towards
circular
economy.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
36(33)
Published: June 13, 2024
Abstract
Plastics,
renowned
for
their
outstanding
properties
and
extensive
applications,
assume
an
indispensable
irreplaceable
role
in
modern
society.
However,
the
ubiquitous
consumption
of
plastic
items
has
led
to
a
growing
accumulation
waste.
Unreasonable
practices
production,
utilization,
recycling
plastics
have
substantial
energy
resource
depletion
environmental
pollution.
Herein,
state‐of‐the‐art
advancements
lifecycle
management
are
timely
reviewed.
Unlike
typical
reviews
focused
on
recycling,
this
work
presents
in‐depth
analysis
entire
plastics,
covering
whole
process
from
synthesis,
processing,
ultimate
disposal.
The
primary
emphasis
lies
selecting
judicious
strategies
methodologies
at
each
stage
mitigate
adverse
impact
waste
plastics.
Specifically,
article
delineates
rationale,
methods,
realized
various
stages
through
both
physical
chemical
pathways.
focal
point
is
attainment
optimal
rates
thereby
alleviating
ecological
burden
By
scrutinizing
aims
furnish
comprehensive
solutions
reducing
pollution
fostering
sustainability
across
all
facets
Nano Letters,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 13, 2025
Ruthenium
(Ru)-based
catalysts
are
active
in
catalyzing
polyethylene
(PE)
upcycling,
but
their
tendency
for
methanation
devalues
the
process.
Although
previous
works
confirmed
that
regulation
of
Ru
structure
can
inhibit
methane
yields,
mechanism
is
still
unclear,
and
catalytic
performance
remains
higher
upside
potential.
Herein,
we
synthesized
M-Ru/H-ZSM-5
(M
=
Pt,
Pd,
Rh)
PE
upcycling.
Pt-Ru/H-ZSM-5
had
better
conversion
(84.36%)
liquid
fuel
selectivity
(78.38%)
extremely
low
(8.43%),
which
be
ascribed
to
its
more
electron-deficient
Ruδ+
species
synergistic
effect
induced
by
Pt
doping.
Through
density
functional
theory
calculations,
nature
inhibition
was
uncovered
reaction
pathway
proposed.
Furthermore,
catalyst
demonstrated
stability
reusability,
as
well
efficacy
upcycling
various
PEs.
This
work
reveals
Ru-based
reactions,
promoting
plastic
recycling
development.
