Advanced Materials,
Journal Year:
2023,
Volume and Issue:
35(20)
Published: Feb. 21, 2023
Poly(ethylene
terephthalate)
(PET)
is
an
important
polymer
with
annual
output
second
only
to
polyethylene.
The
development
of
PET
recycling
technologies
therefore
necessary
not
eliminate
the
harm
associated
white
pollution
and
microplastics,
but
also
reduce
carbon
emissions.
Antibacterial
PET,
one
most
high-value
advanced
materials,
has
improved
ability
treat
bacterial
infections.
However,
current
methods
manufacturing
commercial
antibacterial
require
blending
excess
metal-based
agents,
which
leads
biotoxicity
a
nonpersistent
activity.
In
addition,
high-efficiency
organic
agents
have
yet
be
employed
in
due
their
poor
thermal
stabilities.
Herein,
solid-state
reaction
for
upcycling
waste
using
novel
hyperthermostable
monomer
described.
This
catalyzed
by
residual
catalyst
present
waste.
It
found
that
catalytic
amount
enabled
low-cost
produce
recycled
strong
persistent
activity,
as
well
similar
properties
virgin
PET.
work
provides
feasible
economic
strategy
large-scale
exhibits
potential
application
industry.
Green Chemistry,
Journal Year:
2022,
Volume and Issue:
24(23), P. 8899 - 9002
Published: Jan. 1, 2022
This
paper
reviewed
the
entire
life
cycle
of
plastics
and
options
for
management
plastic
waste
to
address
barriers
industrial
chemical
recycling
further
provide
perceptions
on
possible
opportunities
with
such
materials.
Science,
Journal Year:
2022,
Volume and Issue:
377(6614), P. 1561 - 1566
Published: Sept. 29, 2022
The
conversion
of
polyolefins
to
monomers
would
create
a
valuable
carbon
feedstock
from
the
largest
fraction
waste
plastic.
However,
breakdown
main
chains
in
these
polymers
requires
cleavage
carbon–carbon
bonds
that
tend
resist
selective
chemical
transformations.
Here,
we
report
production
propylene
by
partial
dehydrogenation
polyethylene
and
tandem
isomerizing
ethenolysis
desaturated
chain.
Dehydrogenation
high-density
with
either
an
iridium-pincer
complex
or
platinum/zinc
supported
on
silica
as
catalysts
yielded
dehydrogenated
material
containing
up
3.2%
internal
olefins;
combination
second-generation
Hoveyda-Grubbs
metathesis
catalyst
[PdP(
t
Bu)
3
(μ-Br)]
2
isomerization
selectively
degraded
this
unsaturated
polymer
yields
exceeding
80%.
These
results
show
promise
for
application
mild
catalysis
deconstruct
otherwise
stable
polyolefins.
Advanced Energy Materials,
Journal Year:
2022,
Volume and Issue:
12(22)
Published: April 21, 2022
Abstract
Plastic
waste
remains
a
global
challenge
due
to
the
massive
amounts
being
produced
without
satisfactory
treatment
technologies
for
recycling
and
upcycling.
Photocatalytic
processes
are
emerging
as
green
promising
approaches
upcycle
plastics
into
value‐added
products
under
mild
conditions
using
sunlight
energy
source.
In
this
review,
recent
advances
in
plastic
conversion
through
photocatalysis
have
been
comprehensively
summarized.
Special
emphasis
is
placed
on
photocatalytic
mechanism
selective
CC
CH
bond
transformations
of
access
fuels,
chemicals,
materials.
Finally,
challenges
perspectives
establishing
new
paradigm
toward
sustainable
circular
economy
also
put
forward.
ACS Catalysis,
Journal Year:
2022,
Volume and Issue:
12(15), P. 9307 - 9324
Published: July 18, 2022
Plastic
waste
triggers
a
series
of
concerns
because
its
disruptive
impact
on
the
environment
and
ecosystem.
From
point
view
catalysis,
however,
end-of-life
plastics
can
be
seen
as
an
untapped
feedstock
for
preparation
value-added
products.
Thus,
development
diversified
catalytic
approaches
valorization
is
urgent.
Previous
reviews
this
field
have
systematically
summarized
progress
made
plastic
reclamation.
In
review,
we
emphasize
design
processes
by
leveraging
state-of-the-art
technologies
from
other
developed
fields
to
derive
valuable
polymers,
functional
materials,
chemicals
plastics.
The
principles,
mechanisms,
opportunities
chemical
(thermo-,
electro-,
photocatalytic)
well
biocatalytic
ones
are
discussed,
which
may
provide
more
insights
future
processes.
Finally,
outlooks
perspectives
accelerate
toward
feasible
economy
discussed.
Science,
Journal Year:
2023,
Volume and Issue:
381(6658), P. 660 - 666
Published: Aug. 10, 2023
Waste
plastics
are
an
abundant
feedstock
for
the
production
of
renewable
chemicals.
Pyrolysis
waste
produces
pyrolysis
oils
with
high
concentrations
olefins
(>50
weight
%).
The
traditional
petrochemical
industry
uses
several
energy-intensive
steps
to
produce
from
fossil
feedstocks
such
as
naphtha,
natural
gas,
and
crude
oil.
In
this
work,
we
demonstrate
that
oil
can
be
used
aldehydes
through
hydroformylation,
taking
advantage
olefin
functionality.
These
then
reduced
mono-
dialcohols,
oxidized
dicarboxylic
acids,
or
aminated
diamines
by
using
homogeneous
heterogeneous
catalysis.
This
route
high-value
oxygenated
chemicals
low-value
postconsumer
recycled
polyethylene.
We
project
produced
could
lower
greenhouse
gas
emissions
~60%
compared
their
petroleum
feedstocks.
ACS Catalysis,
Journal Year:
2023,
Volume and Issue:
13(6), P. 3575 - 3590
Published: Feb. 27, 2023
Plastic
waste
pollution
is
becoming
one
of
the
most
pressing
environmental
crises
due
to
large-scale
production
without
satisfactory
recycling
schemes,
especially
with
outbreak
COVID-19
pandemic
in
recent
years.
Upcycling
plastic
into
valuable
chemicals
powered
by
solar
energy
presents
a
substantially
untapped
opportunity
turn
treasure.
In
this
review,
fundamental
principles
from
nonselective
degradation
selective
synthesis
are
first
clarified.
Then,
we
aim
outline
representative
advances
photoredox-based
catalytic
conversion.
Particular
emphasis
placed
on
valorization
regarding
versus
synthesis.
Finally,
present
challenges
and
individual
insights
for
further
exploration
conversion
domain.
It
anticipated
that
timely
critical
review
would
provide
an
instructive
direction
foresight
plastics
value-added
chemical
feedstocks,
thus
stimulating
development
circular
sustainable
economy
coming
decades.
