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.
The Science of The Total Environment,
Journal Year:
2022,
Volume and Issue:
851, P. 158022 - 158022
Published: Aug. 12, 2022
Understanding
the
fate
of
plastics
in
environment
is
critical
importance
for
quantitative
assessment
biological
impacts
plastic
waste.
Specially,
there
a
need
to
analyze
more
detail
reputed
longevity
context
degradation
through
oxidation
and
fragmentation
reactions.
Photo-oxidation
debris
by
solar
UV
radiation
(UVR)
makes
material
prone
subsequent
fragmentation.
The
fragments
generated
following
exposure
mechanical
stresses
include
secondary
micro-
or
nanoparticles,
an
emerging
class
pollutants.
paper
discusses
UV-driven
photo-oxidation
process,
identifying
relevant
knowledge
gaps
uncertainties.
Serious
exist
concerning
wavelength
sensitivity
dose-response
photo-fragmentation
process.
Given
heterogeneity
natural
irradiance
varying
from
no
sediments
full
floating,
beach
litter
air-borne
plastics,
it
argued
that
rates
degradation/fragmentation
will
also
vary
dramatically
between
different
locations
environmental
niches.
Biological
phenomena
such
as
biofouling
further
modulate
radiation,
while
potentially
contributing
and/or
independent
UVR.
Reductions
UVR
many
regions,
consequent
implementation
Montreal
Protocol
its
Amendments
protecting
stratospheric
ozone,
have
consequences
global
heterogeneous
manner
across
geographic
zones.
interacting
effects
warming,
ozone
are
projected
increase
at
surface
localized
areas,
mainly
because
decreased
cloud
cover.
complexity
uncertainty
future
conditions,
this
currently
precludes
reliable
predictions
persistence
on
scale.
Chemical Society Reviews,
Journal Year:
2022,
Volume and Issue:
52(1), P. 8 - 29
Published: Dec. 5, 2022
We
divide
the
up-to-date
techniques
into
two
categories:
technologies
executed
under
violent
conditions
and
mild
conditions,
we
present
a
timely
summary
of
mechanism
bond
cleavage
in
plastic
waste
to
produce
valuable
chemicals.
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.
Nature Communications,
Journal Year:
2022,
Volume and Issue:
13(1)
Published: Aug. 16, 2022
The
continuous
increase
in
manufacturing
coupled
with
the
difficulty
of
recycling
plastic
products
has
generated
huge
amounts
waste
plastics.
Most
existing
chemical
and
upcycling
methods
suffer
from
harsh
conditions
poor
product
selectivity.
Here
we
demonstrate
a
photocatalytic
method
to
oxidize
polystyrene
aromatic
oxygenates
under
visible
light
irradiation
using
heterogeneous
graphitic
carbon
nitride
catalysts.
Benzoic
acid,
acetophenone,
benzaldehyde
are
dominant
liquid
phase
when
conversion
reaches
>90%
at
150
°C.
For
transformation
0.5
g
waste,
0.36
is
obtained.
reaction
mechanism
also
investigated
various
characterization
procedes
via
activation
form
hydroxyl
carbonyl
groups
over
its
backbone
C-H
bond
oxidation
which
followed
by
oxidative
breakage
C-C
further
processes
oxygenates.
ACS Catalysis,
Journal Year:
2022,
Volume and Issue:
12(20), P. 12823 - 12832
Published: Oct. 7, 2022
Plastic
valorization
presents
a
significantly
untapped
opportunity
to
address
environmental
issues
while
creating
the
necessary
economic
push
for
circular
carbon
economy.
Compared
with
conventional
routes
processing
plastics
(e.g.,
pyrolysis
and
gasification),
photoreforming
strategy,
namely,
photocatalytic
plastic
oxidation
paired
water
splitting,
aims
achieve
into
commodity
chemicals
under
mild
conditions
offering
hydrogen
fuels.
Here,
we
implement
MoS2-tipped
CdS
nanorod
photocatalysts
in
an
aqueous
medium
reform
pretreated
that
range
from
polyesters
polylactic
acid
(PLA)
polyethylene
terephthalate
(PET))
polyolefins
(PE)).
The
architecture
of
MoS2/CdS
takes
advantage
anisotropic
morphology
rapid
charge
transfer
features
nanorods,
by
collecting
electrons
at
MoS2
tip
evolution
utilizing
entire
sidewall
nanorods
rich
holes
toward
oxidation.
It
is
shown
continuous
H2
can
be
evolved
PLA,
PET
(commercial
granules
real-world
bottles),
PE,
these
substrates
are
accordingly
converted
series
valuable
chemicals.
This
work
provides
effective
way
harness
solar
energy
realize
transformation
trash
(plastics)
treasure
(gaseous/liquid
chemicals).
ACS ES&T Engineering,
Journal Year:
2021,
Volume and Issue:
1(11), P. 1481 - 1501
Published: Sept. 30, 2021
Microplastic
waste
is
an
emerging
global
issue
due
to
its
environmental
effect
of
accumulation
in
ecosystems,
and
managing
systems
have
given
rise
presence
the
aquatic
environment.
It
gaining
attention
persistent
nature
potential
adverse
effects
on
living
organisms.
There
urgent
need
for
development
efficient
degradation
methods
microplastic
(MP)
treatment.
In
this
review,
a
comprehensive
overview
current
MPs,
such
as
biological,
photo,
chemical,
mechanical
been
summarized
discussed
detail.
All
fundamental
mechanisms
MP
natural
environment
are
linked
with
remediation
approaches
accelerate
these
that
occur
nature.
Decomposition
efficiency
applied
system's
limitations
has
also
mentioned.
Furthermore,
knowledge
gaps
about
decomposition,
future
research
directions
proposed.
This
work
offers
summary
decomposition
provides
reference
control
pollution.
Chemical Reviews,
Journal Year:
2023,
Volume and Issue:
123(8), P. 4443 - 4509
Published: April 17, 2023
Energy
from
renewable
resources
is
central
to
environmental
sustainability.
Among
the
renewables,
sunlight-driven
fuel
synthesis
a
sustainable
and
economical
approach
produce
vectors
such
as
hydrogen
through
water
splitting.
The
photocatalytic
splitting
limited
by
oxidation
half-reaction,
which
kinetically
energetically
demanding
entails
designer
photocatalysts.
Such
challenges
can
be
addressed
employing
alternative
half-reactions.
Photoreforming
drive
breakdown
of
waste
plastics
biomass
into
valuable
organic
products
for
production
H2.
We
provide
an
overview
photoreforming
its
underlying
mechanisms
that
convert
polymers
H2
fuels
fine
chemicals.
This
paramount
importance
two
complementary
perspectives:
(i)
green
energy
harvesting
(ii)
sustainability
decomposing
valuables.
Competitive
results
generation
without
hazards
are
being
generated.
process,
mechanisms,
critical
assessment
field
scarce.
address
points
focusing
on
concept
up-to-date
knowledge
with
key
milestones
achieved,
uncovering
concepts
in
photoreforming,
(iii)
design
photocatalysts
pathways
use
different
polymer
wastes
substrates.
