Nitrogenative Degradation of Polystyrene Waste
Journal of the American Chemical Society,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 8, 2025
Owing
to
massive
production
and
poor
end-of-life
management,
plastic
waste
pollution
has
become
one
of
the
most
pressing
environmental
crises.
In
response
mounting
crisis,
past
several
decades
have
witnessed
development
numerous
methods
technologies
for
recycling.
However,
current
recycling
often
produce
low-quality
or
low-value
products,
making
it
difficult
recover
operating
costs.
To
this
end,
we
report
a
novel
preoxygenation-induced
strategy
nitrogenative
degradation
real-life
polystyrene
plastics
into
high-value
aromatic
nitrogen
compounds
in
cost-effective
manner.
Thus,
expensive
highly
demanding
benzonitrile
as
well
benzamide
were
obtained
up
74%
overall
isolated
yield
from
by
using
CuBr
catalyst,
O2
oxidant,
CH3CN
source.
Detailed
mechanistic
investigations
indicate
that
hydroxyl
radicals
activation
play
role
selective
aerobic
process.
Furthermore,
multiple
reaction
pathways
contribute
formation
benzamide.
Язык: Английский
Harnessing Non-Thermal External Stimuli for Polymer Recycling
Macromolecules,
Год журнала:
2025,
Номер
58(5), С. 2210 - 2223
Опубликована: Фев. 18, 2025
Polymeric
materials
have
become
indispensable
due
to
their
versatility
and
low
cost,
yet
environmental
impact
presents
a
significant
global
challenge.
Traditional
chemical
recycling
methods
typically
rely
on
heat
as
stimulus;
for
instance,
pyrolysis
is
popular
methodology
which
faces
limitations
high
energy
consumption,
product
selectivity,
the
generation
of
undesirable
byproducts.
In
response,
recent
advances
in
promotion
depolymerization
degradation
through
alternative
stimuli
such
light,
electrochemistry,
mechanical
force,
shown
promising
potential
more
efficient
selective
polymer
breakdown,
yielding
either
starting
monomers
or
valuable
small
molecules.
This
perspective
explores
key
examples
these
emerging
strategies,
highlighting
improve
upon
current
protocols
offer
pathways
under
milder
conditions,
while
identifying
challenges
that
future
research
must
address
translate
chemistry
into
viable
broadly
applicable
strategies.
Язык: Английский
Iron‐Catalyzed Oxidative Deconstruction of Polyethylene Terephthalate to Terephthalic Acid under O2
Chinese Journal of Chemistry,
Год журнала:
2024,
Номер
42(20), С. 2431 - 2437
Опубликована: Май 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.
Язык: Английский
Leaching behavior of microplastics during sludge mechanical dewatering and its effect on activated sludge
Water Research,
Год журнала:
2024,
Номер
266, С. 122395 - 122395
Опубликована: Сен. 3, 2024
Язык: Английский
Anodic Commodity Polymer Recycling: The Merger of Iron‐Electrocatalysis with Scalable Hydrogen Evolution Reaction
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(48)
Опубликована: Сен. 10, 2024
Abstract
Plastics
are
omnipresent
in
our
everyday
life,
and
accumulation
of
post‐consumer
plastic
waste
environment
represents
a
major
societal
challenge.
Hence,
methods
for
recycling
high
demand
future
circular
economy.
Specifically,
the
degradation
polymers
towards
value‐added
small
molecules
constitutes
sustainable
strategy
carbon
Despite
recent
advances,
chemical
polymer
continues
to
be
largely
limited
redox
agents
or
low
energy
efficiency
photochemical
processes.
We
herein
report
powerful
iron‐catalyzed
molecular
weight
polystyrenes
through
electrochemistry
efficiently
deliver
monomeric
benzoyl
products.
The
robustness
ferraelectrocatalysis
was
mirrored
by
various
real‐life
plastics,
also
on
gram
scale.
cathodic
half
reaction
represented
hydrogen
evolution
(HER).
scalable
electro‐polymer
could
solely
fueled
solar
commercially
available
panel,
indicating
an
outstanding
potential
decentralized
green
Язык: Английский
Anodic Commodity Polymer Recycling: The Merger of Iron‐Electrocatalysis with Scalable Hydrogen Evolution Reaction
Angewandte Chemie,
Год журнала:
2024,
Номер
136(48)
Опубликована: Сен. 10, 2024
Abstract
Kunststoffe
sind
in
unserem
Alltag
allgegenwärtig,
und
die
Akkumulation
von
Kunststoffabfällen
unserer
Umwelt
stellt
ein
großes
gesellschaftliches
Problem
dar.
Daher
Methoden
für
das
Recycling
im
Hinblick
auf
eine
künftige
Kreislaufwirtschaft
hohem
Interesse.
Insbesondere
der
Abbau
Polymeren
nach
Nutzung
durch
Verbraucher
hin
zu
wertschöpfenden
kleinen
Molekülen
nachhaltige
Strategie
Kohlenstoff‐Kreislaufwirtschaft
Trotz
jüngster
Fortschritte
ist
chemische
Polymerabbau
wie
vor
weitgehend
Redox‐Reagenzien
beschränkt
oder
geringe
Energieeffizienz
photochemischer
Prozesse
limitiert.
In
dieser
Arbeit
berichten
wir
über
einen
leistungsstarken
eisenkatalysierten
Polystyrolen
mit
Molekulargewicht
Elektrochemie,
um
effizient
monomere
Benzoylprodukte
liefern.
Die
Robustheit
Ferraelektrokatalyse
wurde
den
verschiedenen
realen
Nach‐Gebrauchs‐Kunststoffen,
ebenfalls
Gramm‐Maßstab,
bestätigt.
kathodische
Halbreaktion
Wasserstoffentwicklungsreaktion
(HER)
dargestellt.
Der
skalierbare
elektrolytische
konnte
ausschließlich
Solarenergie
handelsübliches
Solarpanel
betrieben
werden,
was
herausragendes
Potenzial
dezentralisierte,
grüne
Wasserstoffwirtschaft
hinweist.
Photooxidation of Polystyrene into High‐Value Chemicals
European Journal of Organic Chemistry,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 5, 2024
Abstract
Plastics
play
a
crucial
role
in
the
survival
and
advancement
of
human
civilization.
However,
increasing
challenge
plastic
pollution
presents
significant
obstacles.
Disposal
methods
such
as
incineration
landfilling
result
substantial
resource
wastage
pose
potential
environmental
hazards.
The
slow
progress
recycling
reusing
waste
plastics
hinders
their
industrial
application
effective
response
to
crises.
Photocatalysis
offers
promising
solutions
for
future
recycling,
particularly
with
recent
increase
photocatalytic
degradation
polystyrene
(PS).
This
review
provides
comprehensive
overview
latest
advancements
photooxidation
PS
into
high‐value
chemicals.
Язык: Английский