European Journal of Organic Chemistry,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 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.
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.
Chemical Reviews,
Journal Year:
2024,
Volume and Issue:
124(16), P. 9457 - 9579
Published: Aug. 16, 2024
The
large
production
volumes
of
commodity
polyolefins
(specifically,
polyethylene,
polypropylene,
polystyrene,
and
poly(vinyl
chloride)),
in
conjunction
with
their
low
unit
values
multitude
short-term
uses,
have
resulted
a
significant
pressing
waste
management
challenge.
Only
small
fraction
these
is
currently
mechanically
recycled,
the
rest
being
incinerated,
accumulating
landfills,
or
leaking
into
natural
environment.
Since
are
energy-rich
materials,
there
considerable
interest
recouping
some
chemical
value
while
simultaneously
motivating
more
responsible
end-of-life
management.
An
emerging
strategy
catalytic
depolymerization,
which
portion
C-C
bonds
polyolefin
backbone
broken
assistance
catalyst
and,
cases,
additional
molecule
reagents.
When
products
molecules
materials
higher
own
right,
as
feedstocks,
process
called
upcycling.
This
review
summarizes
recent
progress
for
four
major
upcycling
strategies:
hydrogenolysis,
(hydro)cracking,
tandem
processes
involving
metathesis,
selective
oxidation.
Key
considerations
include
macromolecular
reaction
mechanisms
relative
to
mechanisms,
design
transformations,
effect
conditions
on
product
selectivity.
Metrics
describing
critically
evaluated,
an
outlook
future
advances
described.
Green Chemistry,
Journal Year:
2024,
Volume and Issue:
26(12), P. 7384 - 7405
Published: Jan. 1, 2024
Z-Scheme
photocatalysts
for
sustainable
hydrogenolysis
of
β-O-4,
α-O-4,
and
4-O-5
linkages
lignin-derived
ether
in
the
selective
production
aromatics
or
aliphatic
hydrocarbons.
ACS Applied Nano Materials,
Journal Year:
2023,
Volume and Issue:
7(1), P. 1462 - 1476
Published: Dec. 29, 2023
In
this
study,
a
Z-scheme
heterojunction
photocatalyst
is
fabricated
by
systematically
manipulating
and
integrating
g-C3N4
ZnO.
The
g-C3N4(x)/ZnO(y)
exhibits
enhanced
charge
separation
migration,
confirmed
through
photoluminescence
(PL),
time-correlated
single-photon
counting
spectroscopy,
electrochemical
impedance
spectroscopy.
Pd
NPs,
with
an
elevated
work
function
low
Fermi
energy
level,
are
decorated
onto
the
heterojunction,
further
amplifying
separation,
as
revealed
ultraviolet
photoelectron
resulting
Pd-decorated
photocatalysts
(Z%Pd@g-C3N4(x)/ZnO(y))
evaluated
for
selective
reduction
of
α–β
unsaturated
compound,
cinnamaldehyde.
catalysts
lower
NPs
(0.5
or
1%)
afford
∼100%
yield
hydrocinnamaldehyde,
while
higher
(3%Pd@g-C3N4(0.73)/ZnO(0.27))
hydrocinnamyl
alcohol.
Biomass-derived
furanic
aldehydes
afforded
ring-reduced
side-chain-reduced
products
under
different
loading,
whereas
no
were
obtained
aromatic
aldehydes.
Interface
interactions
impact
leading
to
longer
lifetimes
photogenerated
pairs
improved
electrons
holes
in
photocatalytic
processes.
Characterizations
control
experiments
provide
valuable
insights
into
structure–activity
relationship,
ultimately
contributing
formulating
plausible
reaction
mechanism
reduction.
Organic Chemistry Frontiers,
Journal Year:
2024,
Volume and Issue:
11(13), P. 3525 - 3530
Published: Jan. 1, 2024
An
efficient
and
novel
bromide-catalyzed
oxo-amination
of
aryl
alkenes
towards
the
synthesis
α-amine
ketones
under
photoelectrocatalysis
conditions
was
developed.
The
generation
2-bromo-1-phenylethanone
supposed
as
key
step.
Journal of the American Chemical Society,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 26, 2025
Polystyrene
(PS)
is
a
widely
used
thermoplastic
polymer,
but
its
very
low
recycling
rate
has
motivated
consideration
of
chemical
conversion
strategies
to
convert
waste
PS
into
value-added
products.
Oxidation
methods
have
been
studied,
they
typically
generate
benzoic
acid,
product
with
relatively
market
demand.
Phenol
higher
volume
that
would
be
an
appealing
target,
no
currently
exist
for
the
phenol.
The
repeat
unit
in
closely
resembles
cumene,
primary
feedstock
produce
phenol
through
Hock
process.
Here,
we
investigate
prospects
adapting
process
PS,
generating
hydroperoxides
autoxidation
benzylic
C-H
bonds
followed
by
acid-promoted
rearrangement
afford
and
partially
oxygenated
polymer.
Experimental
computational
studies
dimeric
trimeric
model
compounds
show
neighboring
phenyl
rings
impose
conformational
constraints
raise
barrier
hydrogen-atom
transfer
from
tertiary
bond.
These
effects
are
also
evident
contribute
lower
yields
when
subjected
conditions.
results
provide
valuable
insights
important
implications
other
efforts
seek
adapt
small-molecule
reactivity
polymeric
feedstocks.
