Angewandte Chemie International Edition,
Год журнала:
2023,
Номер
63(3)
Опубликована: Ноя. 30, 2023
Leveraging
electrochemistry
to
degrade
robust
polymeric
materials
has
the
potential
impact
society's
growing
issue
of
plastic
waste.
Herein,
we
develop
an
electrocatalytic
oxidative
degradation
polyethers
and
poly(vinyl
ethers)
via
electrochemically
mediated
hydrogen
atom
transfer
(HAT)
followed
by
polymer
promoted
molecular
oxygen.
We
investigated
selectivity
efficiency
this
method,
finding
our
conditions
be
highly
selective
for
polymers
with
hydridic,
electron-rich
C-H
bonds.
leveraged
reactivity
in
presence
polymethacrylates
polyacrylates
complete
selectivity.
Furthermore,
method
made
degradable
incorporation
ether
units
into
backbone.
quantified
products,
identifying
up
36
mol
%
defined
oxidation
including
acetic
acid,
formic
acetaldehyde,
extended
a
polyether-based
polyurethane
green
solvent.
This
work
demonstrates
facile,
electrochemically-driven
route
containing
functionalities.
Heliyon,
Год журнала:
2023,
Номер
9(11), С. e22562 - e22562
Опубликована: Ноя. 1, 2023
We
investigated
the
use
of
titania
coated
ZnO
tetrapods
for
photocatalytic
degradation
two
common
types
microplastics,
namely
polyethylene
(PE)
microparticles
and
polyester
(PES)
microfibers.
found
that
plastics
morphology
affects
rate
degradation,
electron
scavengers
is
needed
to
maintain
reactivity
photocatalysts
over
a
prolonged
period
time.
Complete
mass
loss
PE
PES
achieved
under
UV
illumination
480
h
624
h,
respectively.
In
addition
pristine
environmental
microplastics
sample
(consisting
primarily
polypropylene)
was
also
demonstrated,
though
in
this
case
longer
time
(∼816
h)
achieve
complete
samples.
TrAC Trends in Analytical Chemistry,
Год журнала:
2024,
Номер
173, С. 117631 - 117631
Опубликована: Март 5, 2024
The
pervasive
presence
of
plastics
in
the
environment,
particularly
microplastics,
has
become
a
significant
global
challenge,
demanding
innovative
solutions
for
their
management
and
upcycling.
While
traditional
methods
including
landfill
incineration
face
limitations
environmental
impact,
emerging
technologies
offer
promising
pathways
conversion
into
valuable
chemicals
fuels,
operating
under
ambient
conditions
often
utilizing
sustainable
energy
sources.
Considering
current
research
progress
plastic
upgrading,
it
is
necessary
to
summarize
chemical
upcycling
waste.
To
this
end,
review
provides
an
overall
examination
methodologies
treatment,
pyrolysis,
hydrogenolysis,
photocatalysis,
electrocatalysis.
Existing
knowledge
gaps
future
directions
are
then
proposed.
Overall,
highlights
potential
these
novel
approaches
aligning
with
principles
circular
economy.
Polymers,
Год журнала:
2024,
Номер
16(19), С. 2807 - 2807
Опубликована: Окт. 3, 2024
The
extensive
use
of
polymeric
materials
has
resulted
in
significant
environmental
pollution,
prompting
the
need
for
a
deeper
understanding
their
degradation
processes
and
impacts.
This
review
provides
comprehensive
analysis
environment
impact
on
health
experimental
animals.
It
identifies
common
polymers,
delineates
pathways,
describes
resulting
products
under
different
conditions.
covers
physical,
chemical,
biological
mechanisms,
highlighting
complex
interplay
factors
influencing
these
processes.
Furthermore,
it
examines
implications
products,
using
animals
as
proxies
assessing
potential
risks
to
human
health.
By
synthesizing
current
research,
focuses
studies
related
small
organisms
(primarily
rodents
invertebrates,
supplemented
by
fish
mollusks)
explore
effects
polymer
living
underscores
urgency
developing
implementing
effective
waste
management
strategies.
These
strategies
are
crucial
mitigating
adverse
impacts
degradation,
thus
promoting
more
sustainable
interaction
between
activities
natural
environment.
Catalysts,
Год журнала:
2023,
Номер
13(8), С. 1204 - 1204
Опубликована: Авг. 11, 2023
Photocatalytic
membrane
reactors
(PMRs)
have
been
found
to
be
very
effective
in
the
removal
of
organic
pollutants
(particularly
recalcitrant
compounds)
from
wastewater
because
they
allow
for
mineralization
innocuous
by-products,
thus
achieving
high-quality
treated
water.
Owing
high
volumes
water
involved,
sewage
could
reused
if
a
efficient
tertiary
stage,
like
PMR,
can
foreseen.
In
this
review,
two
main
PMR
configurations
(photocatalytic
membranes
and
slurry
PMRs)
were
analyzed
as
requirements
treatment
considering
six
design
operational
parameters
such
plants:
(i)
continuous
flow
rate
secondary
stage;
(ii)
self-control
photodegradation
related
chemical–physical
parameters;
(iii)
ability
handle
variations
concentration
rate;
(iv)
control
quality
wastewater;
(v)
low
plant
footprint;
(vi)
easy
maintenance.
analysis,
some
characteristics
photocatalysis
(which
involves
three
phases:
solid
(the
photocatalyst),
liquid
wastewater),
gas
(oxygen
or
air))
those
(they
produced
using
different
materials
configurations,
processes
(pressure-driven
not
pressure-driven),
etc.)
considered.
The
obtained
results
show
that
PMRs
seem
more
suitable
than
photocatalytic
applications.
We
believe
review
trigger
shift
research
laboratory
industry
reactors.
Nanoscale,
Год журнала:
2024,
Номер
16(16), С. 8013 - 8019
Опубликована: Янв. 1, 2024
By
utilizing
the
photocatalysis
of
a
polyoxometalate,
[γ-PV
2
W
10
O
40
]
5−
,
we
developed
system
for
multiple-stimuli-responsive
polymer
degradation
that
allows
various
polymers
when
multiple
stimuli,
specifically,
light
and
Cl
−
are
present.
