Communications Chemistry,
Journal Year:
2024,
Volume and Issue:
7(1)
Published: Feb. 20, 2024
As
the
effective
use
of
carbon
resources
has
become
a
pressing
societal
issue,
importance
chemical
recycling
plastics
increased.
The
catalytic
decomposition
for
is
promising
approach
creating
valuable
products
under
efficient
and
mild
conditions.
Although
several
commodity
engineering
have
been
applied,
decompositions
stable
resins
composed
strong
main
chains
such
as
polyamides,
thermoset
resins,
super
are
underdeveloped.
Especially,
that
high
heat
resistance,
low
solubility
nearly
unexplored.
In
addition,
many
robust
aromatic
ethers,
which
difficult
to
cleave.
Herein,
we
report
depolymerization-like
oxyphenylene-based
polyetheretherketone
polysulfone
using
thiols
via
selective
carbon-oxygen
chain
cleavage
form
electron-deficient
arenes
with
sulfur
functional
groups
bisphenols.
catalyst
combination
bulky
phosphazene
base
P
ACS Catalysis,
Journal Year:
2024,
Volume and Issue:
14(7), P. 4865 - 4926
Published: March 18, 2024
Rapid
industrialization
and
development
have
led
to
a
tremendous
increase
in
the
use
of
various
types
plastic
commodities
daily
life.
For
past
several
years,
pollution
has
become
global
issue,
posing
serious
threat
mankind.
The
primary
issue
with
increasing
is
lack
proper
management
which
created
huge
havoc
environment.
From
initial
phase
waste
management,
been
discarded,
recycled,
downcycled,
or
dumped
into
landfills
large
proportion,
causing
extreme
damage
ecosystem.
Conventionally,
treated
via
thermal
processes
such
as
pyrolysis
incineration
plants
require
amount
capital
and,
therefore,
harms
aim
circular
economy.
Chemical
upcycling
gaining
attention
high-potential
catalytic
strategy
convert
plastics,
polyethylene
terephthalate,
polyethylene,
polystyrene,
etc.
fuels,
functionalized
polymers,
other
value-added
chemicals
having
direct
impact
on
affordability
viability.
In
this
review,
we
focused
photocatalysis,
electrocatalysis,
photoelectrocatalysis
effective
efficient
technologies.
These
approaches
can
lower
dependence
nonrenewable
resources
are
more
environmentally
friendly
contrast
conventional
approaches.
This
review
elaborately
discusses
pros
cons
provides
detailed
overview
potential
renewable
energy-driven
for
conversion
wastes
valuable
fuels
commodity
chemicals,
along
challenges
future
directions
emerging
approach
treatment.
Advanced Energy Materials,
Journal Year:
2023,
Volume and Issue:
13(41)
Published: Sept. 24, 2023
The
huge
amount
of
plastic
wastes
has
become
a
pressing
global
environmental
problem,
leading
to
severe
pollution
and
resource
depletion
through
conventional
downcycling
technologies
like
incineration
landfilling.
In
contrast,
selective
upcycling
various
plastics
offers
promising
solution
for
converting
waste
into
valuable
products.
This
review
provides
comprehensive
overview
the
recent
advancements
in
innovative
catalytic
technologies,
including
thermocatalysis,
electrocatalysis,
photocatalysis.
Special
emphasis
is
placed
on
elucidating
reaction
mechanisms,
activating
designated
chemical
bonds
high
selectivity,
elaborating
above
techniques
terms
conditions
Finally,
application
prospects
future
development
trends
catalysis
are
discussed,
providing
insights
realizing
sustainable
circular
economy.
Nature Communications,
Journal Year:
2024,
Volume and Issue:
15(1)
Published: March 20, 2024
Abstract
Only
a
small
proportion
of
global
plastic
waste
is
recycled,
which
most
mechanically
recycled
into
lower
quality
materials.
The
alternative,
chemical
recycling,
enables
renewed
production
pristine
materials,
but
generally
comes
at
high
energy
cost,
particularly
for
processes
like
pyrolysis.
This
review
focuses
on
light-driven
approaches
chemically
recycling
and
upcycling
waste,
with
emphasis
reduced
consumption
selective
transformations
not
achievable
heat-driven
methods.
We
focus
challenging
to
recycle
backbone
structures
composed
mainly
C‒C
bonds,
lack
functional
groups
i.e.,
esters
or
amides,
that
facilitate
e.g.,
by
solvolysis.
discuss
the
use
light,
either
in
conjunction
heat
drive
depolymerization
monomers
via
photocatalysis
transform
polymers
valuable
molecules.
structural
prerequisites
these
are
outlined,
highlighting
their
advantages
as
well
limitations.
conclude
an
outlook,
addressing
key
challenges,
opportunities,
provide
guidelines
future
photocatalyst
(PC)
development.
ACS Materials Letters,
Journal Year:
2024,
Volume and Issue:
7(1), P. 359 - 367
Published: Dec. 24, 2024
Solar-driven
CO2
reduction
combined
with
plastic
waste
valorization
presents
a
versatile
approach
to
simultaneously
reset
misaligned
hydrocarbon
resources
and
achieve
carbon-neutral
cycle.
Herein,
we
demonstrate
co-upcycling
heterogeneous
photoredox
catalysis
for
efficient
tunable
syngas,
integrated
polyethylene
terephthalate
(PET)
conversion
accessing
acetate,
over
the
spherical
band-gap-engineered
ZnxCd1–xS
catalyst.
The
key
steering
syngas
H2/CO
rate
is
modulate
conduction
band
bottom
potentials
of
photocatalysts
by
altering
Zn/Cd
ratio,
which
results
in
production
wide
range.
Moreover,
controlled
variations
molar
ratio
regulate
electron–hole
separation
capability,
thereby
endowing
Zn0.8Cd0.2S
optimum
acetate
rates.
underlying
mechanistic
origin
such
redox
reaction
involving
CO2-assisted
PET
has
been
systematically
investigated.
This
win-win
cooperative
offers
tantalizing
possibility
into
value-added
feedstocks.
Chemical Society Reviews,
Journal Year:
2024,
Volume and Issue:
53(14), P. 7309 - 7327
Published: Jan. 1, 2024
Oxidative
degradation
is
a
powerful
method
to
degrade
plastics
into
oligomers
and
small
oxidized
products.
While
thermal
energy
has
been
conventionally
employed
as
an
external
stimulus,
recent
advances
in
photochemistry
have
enabled
photocatalytic
oxidative
of
polymers
under
mild
conditions.
This
tutorial
review
presents
overview
degradation,
from
its
earliest
examples
emerging
strategies.
briefly
discusses
the
motivation
development
with
focus
on
underlying
mechanisms.
Then,
we
will
examine
modern
studies
primarily
relevant
catalytic
degradation.
Lastly,
highlight
some
unique
using
unconventional
approaches
for
polymer
such
electrochemistry.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(11)
Published: Jan. 10, 2024
Abstract
Upgrading
of
polyethylene
terephthalate
(PET)
waste
into
valuable
oxygenated
molecules
is
a
fascinating
process,
yet
it
remains
challenging.
Herein,
we
developed
two‐step
strategy
involving
methanolysis
PET
to
dimethyl
(DMT),
followed
by
hydrogenation
DMT
produce
the
high‐valued
chemical
methyl
p‐methyl
benzoate
(MMB)
using
fixed‐bed
reactor
and
Cu/ZrO
2
catalyst.
Interestingly,
discovered
phase
structure
ZrO
significantly
regulates
selectivity
products.
Cu
supported
on
monoclinic
(5
%Cu/m‐ZrO
)
exhibits
an
exceptional
86
%
for
conversion
MMB,
while
tetragonal
%Cu/t‐ZrO
predominantly
produces
p‐xylene
(PX)
with
75
%.
The
superior
MMB
over
Cu/m‐ZrO
can
be
attributed
weaker
acid
sites
present
m‐ZrO
compared
t‐ZrO
.
This
weak
acidity
leads
moderate
adsorption
capability
facilitating
its
desorption.
Furthermore,
DFT
calculations
reveal
catalyst
shows
higher
effective
energy
barrier
cleavage
second
C−O
bond
Cu/t‐ZrO
catalyst;
this
distinction
ensures
high
MMB.
not
only
presents
approach
upgrading
fine
chemicals
but
also
offers
controlling
primary
product
in
multistep
reaction.
