Interdisciplinary materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Aug. 14, 2024
Abstract
Plastics
are
a
ubiquitous
and
growing
presence
in
our
lives,
with
chlorinated
plastics,
like
polyvinyl
chloride
(PVC),
playing
pivotal
role
due
to
their
superior
qualities.
However,
the
disposal
recycling
of
these
materials
present
significant
challenges.
The
chlorine
content
can
harm
catalysts,
corrode
equipment,
create
dangerous
pollutants,
making
management
plastic
waste
critical
issue
efforts.
There
is
pressing
need
for
green,
effective,
atom‐efficient
methods
handle
this
responsibly.
This
review
explores
potential
converting
into
valuable
resources.
We
examine
four
key
areas
upcycling
reusing
PVC
waste,
including
innovative
separation
techniques,
leveraging
molecular
structure,
carbon
components
inherent
PVC.
By
offering
thorough
analysis
current
strategies
highlighting
existing
solutions,
aims
inform
inspire
further
research
crucial
field,
pushing
towards
more
sustainable
practices.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
36(37)
Published: Feb. 20, 2024
Abstract
Liquid
organic
hydrogen
carriers
(LOHCs)
have
gained
significant
attention
for
large‐scale
storage
due
to
their
remarkable
gravimetric
capacity
(HSC)
and
compatibility
with
existing
oil
gas
transportation
networks
long‐distance
transport.
However,
the
practical
application
of
reversible
LOHC
systems
has
been
constrained
by
intrinsic
thermodynamic
properties
performances
associated
catalysts
in
(de)hydrogenation
cycles.
To
overcome
these
challenges,
thermodynamically
favored
carriers,
high‐performance
catalysts,
catalytic
procedures
need
be
developed.
Here,
advances
recent
years
summarized,
primarily
centered
on
regular
catalyzed
homogeneous
heterogeneous
including
dehydrogenative
aromatization
cycloalkanes
arenes
N
‐heterocyclics
‐heteroarenes,
as
well
reverse
hydrogenation
processes.
Furthermore,
development
metal
complexes
coupling,
a
new
family
based
alcohols
is
described
that
can
release
H
2
under
relatively
mild
conditions.
Finally,
views
next
steps
challenges
field
technology
are
provided,
emphasizing
resources
low‐cost
technologies,
scenarios.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(37)
Published: June 26, 2024
Abstract
We
present
an
innovative
process
for
directly
transforming
poly(ethylene
terephthalate)
(PET),
a
polymer
extensively
used
in
food
and
beverage
packaging,
into
trans
‐isomer‐enriched
1,4‐cyclohexanedimethanol
(CHDM),
key
ingredient
advanced
specialty
polymers.
Our
approach
leverages
dual‐catalyst
system
featuring
palladium
on
reduced
graphene
oxide
(Pd/
r
‐GO)
oxalate‐gel‐derived
copper‐zinc
(
og
‐CuZn),
utilizing
hydrogenation/hydrogenolysis
relay
catalysis.
This
method
efficiently
transforms
PET
polyethylene‐1,4‐cyclohexanedicarboxylate
(PECHD),
which
is
then
converted
CHDM
with
impressive
overall
yield
of
95
%
two‐stage
process.
effectively
handles
various
post‐consumer
plastics,
converting
them
yields
between
78
89
across
different
substrates.
Additionally,
we
demonstrate
the
applicability
scalability
this
through
temperature‐programmed
three‐stage
10‐gram
scale,
results
purified
isolated
87
notably
higher
/
cis
ratio
up
to
4.09/1,
far
exceeding
that
commercially
available
CHDM.
research
not
only
provides
viable
route
repurposing
waste
but
also
enhances
control
selectivity
patterns
multistage
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(22)
Published: March 16, 2024
Recycling
of
carbon
fiber-reinforced
polymer
composites
(CFRCs)
based
on
thermosetting
plastics
is
difficult.
In
the
present
study,
high-performance
CFRCs
are
fabricated
through
complexation
aromatic
pinacol-cross-linked
polyurethane
(PU-AP)
thermosets
with
fiber
(CF)
cloths.
PU-AP
exhibit
a
breaking
strength
95.5
MPa
and
toughness
473.6
MJ
m
ACS Nano,
Journal Year:
2024,
Volume and Issue:
18(31), P. 20340 - 20352
Published: July 25, 2024
Electrorefinery
of
polybutylene
terephthalate
(PBT)
waste
plastic,
specifically
conversion
a
PBT-derived
1,4-butanediol
(BDO)
monomer
into
value-added
succinate
coupled
with
H2
production,
emerges
as
an
auspicious
strategy
to
mitigate
severe
plastic
pollution.
Herein,
we
report
the
synthesis
Mn-doped
NiNDA
nanosheets
(NDA:
2,6-naphthalenedicarboxylic
acid),
metal–organic
framework
(MOF)
through
ligand
exchange
method,
and
its
utilization
for
electrocatalytic
BDO
oxidation
succinate.
Interestingly,
transformation
doped
layered-hydroxide
(d-LH)
precursors
MOF
promotes
while
hindering
competitive
oxygen
evolution
reaction.
Experimental
theoretical
results
indicate
that
has
higher
affinity
(i.e.,
alcoholophilic)
than
d-LH,
Mn
doping
in
electron
accumulation
at
Ni
sites
upward
shift
d-band
center
convenient
spin-dependent
charge
transfer,
which
are
all
beneficial
oxidation.
The
as-constructed
two-electrode
membrane-electrode
assembly
(MEA)
flow
cell,
by
coupling
hydrogen
reaction,
attains
industrial
current
density
1.5
A
cm–[email protected]
V
50
°C,
corresponding
specific
energy
consumption
3.68
kWh/Nm3
H2.
This
represents
saving
>25%
production
on
scale
compared
conventional
water
electrolysis
(∼5
H2)
addition
valuable
chemicals.
ChemPlusChem,
Journal Year:
2024,
Volume and Issue:
unknown
Published: May 3, 2024
Chemical
recycling
and
upcycling
offer
promising
approaches
for
the
management
of
plastic
wastes.
Hydrodeoxygenation
(HDO)
is
one
appealing
ways
conversion
oxygen-containing
wastes,
including
polyethylene
terephthalate
(PET),
polybutylene
(PBT),
polycarbonate
(PC),
polyphenyl
ether
(PPO),
polyether
ketone
(PEEK),
into
cyclic
alkanes
aromatics
in
high
yields
under
mild
reaction
conditions.
The
challenge
lies
achieving
C-O
activation
while
preserving
C-C
bonds.
In
this
review,
we
highlight
recent
advancements
catalytic
strategies
catalysts
these
wastes
cycloalkanes
aromatics.
systems,
multi-step
routes,
direct
HDO
transfer
methods,
are
exemplified.
design
performance
systematically
summarized
compared.
We
comprehensively
discuss
functions
catalysts'
components,
pathway
mechanism
to
gain
insights
process
efficient
valorization
Finally,
provide
perspectives
field,
with
specific
emphasis
on
non-noble
metal
catalyst
design,
selectivity
control,
network
studies,
mixed
product
functionalization.
anticipate
that
review
will
inspire
innovations
development
rational
aromatic
plastics
establish
a
low-emission
circular
economy.
Chinese Journal of Chemistry,
Journal Year:
2024,
Volume and Issue:
42(20), P. 2431 - 2437
Published: May 31, 2024
Comprehensive
Summary
It
is
urgent
to
recycle
polyethylene
terephthalate
(PET)
effectively,
since
it
the
most
consumed
synthetic
polyester
and
its
improper
disposal
has
caused
significant
environmental
pollution.
The
existing
chemical
recycling
methods
highly
rely
on
nucleophilic
substitutions
hydrogenative
depolymerizations,
which
typically
require
use
of
excess
nucleophiles,
strong
acids
or
bases,
expensive
metal
catalysts,
explosive
gas
atmosphere.
Here,
we
demonstrate
a
mild
efficient
protocol
for
oxidative
depolymerization
PET
terephthalic
acid
using
only
an
O
2
balloon.
Terephthalic
can
be
recycled
from
PET‐containing
materials
including
series
plastic
products
in
daily
life.
employing
relatively
low
loading
iron
complex,
earth‐abundant
transition
metal,
as
catalyst
preliminary
results
large‐scale
reaction
38
g
waste
practical
feasibility
this
degradation
method.
This
method
also
applicable
selective
mixed
plastics.
work
represents
rare
example
demonstrates
great
potentials
such
concept
recycling.
