Journal of the American Chemical Society,
Journal Year:
2024,
Volume and Issue:
146(14), P. 9811 - 9818
Published: March 26, 2024
Perfluorooctanoic
acid
(PFOA)
is
an
environmental
contaminant
ubiquitous
in
water
resources,
which
as
a
xenobiotic
and
carcinogenic
agent,
severely
endangers
human
health.
The
development
of
techniques
for
its
efficient
removal
therefore
highly
sought
after.
Herein,
we
demonstrate
unprecedented
zirconium-based
MOF
(PCN-999)
possessing
Zr6
biformate-bridged
(Zr6)2
clusters
simultaneously,
exhibits
exceptional
PFOA
uptake
1089
mg/g
(2.63
mmol/g),
representing
ca.
50%
increase
over
the
previous
record
MOFs.
Single-crystal
X-ray
diffraction
studies
computational
analysis
revealed
that
offer
additional
open
coordination
sites
hosting
PFOA.
coordinated
PFOAs
further
enhance
interaction
between
free
physical
adsorption,
boosting
adsorption
capacity
to
unparalleled
high
standard.
Our
findings
represent
major
step
forward
fundamental
understanding
MOF-based
mechanism,
paving
way
toward
rational
design
next-generation
adsorbents
per-
polyfluoroalkyl
substance
(PFAS)
removal.
Advanced Science,
Journal Year:
2024,
Volume and Issue:
unknown
Published: July 18, 2024
Abstract
Carbon
dots
(CDs)
are
an
emerging
class
of
nanomaterials
with
attractive
optical
properties,
which
promise
to
enable
a
variety
applications.
An
important
and
timely
question
is
whether
CDs
can
become
functional
sustainable
alternative
incumbent
nanomaterials,
notably
inorganic
quantum
dots.
Herein,
the
current
CD
literature
comprehensively
reviewed
as
regards
their
synthesis
function,
focus
on
sustainability
aspects.
The
study
quantifies
why
it
that
be
synthesized
biomass
sole
starting
material
free
from
toxic
precious
metals
critical
raw
materials.
It
further
describes
analyzes
employed
pretreatment,
chemical‐conversion,
purification,
processing
procedures,
highlights
issues
usage
solvents,
energy
efficiency,
safety
waste
management.
specially
shown
many
reported
methods
concerningly
wasteful
utilization
non‐sustainable
solvents
energy.
finally
recommended
future
studies
should
explicitly
consider
discuss
environmental
influence
selected
material,
generated
byproducts,
quantitative
information
required
amounts
consumables,
provided
evaluation
presented
in
upscaled
context.
Molecules,
Journal Year:
2023,
Volume and Issue:
28(22), P. 7564 - 7564
Published: Nov. 13, 2023
In
contrast
to
some
low-molar-mass
per-
and
polyfluoroalkyl
substances
(PFASs),
which
are
well
established
be
toxic,
persistent,
bioaccumulative,
mobile,
fluoropolymers
(FPs)
water-insoluble,
safe,
bioinert,
durable.
These
niche
high-performance
polymers
fulfil
the
13
polymer-of-low-concern
(PLC)
criteria
in
their
recommended
conditions
of
use.
addition,
more
recent
innovations
(e.g.,
use
non-fluorinated
surfactants
aqueous
radical
(co)polymerization
fluoroalkenes)
from
industrial
manufacturers
FPs
highlighted.
This
review
also
aims
show
how
these
specialty
endowed
with
outstanding
properties
essential
(even
irreplaceable,
since
hydrocarbon
polymer
alternatives
used
similar
fail)
for
our
daily
life
(electronics,
energy,
optics,
internet
things,
transportation,
etc.)
constitute
a
special
family
separate
other
“conventional”
C1–C10
PFASs
found
everywhere
on
Earth
its
oceans.
Furthermore,
information
reports
recycling
unzipping
depolymerization
polytetrafluoroethylene,
PTFE,
into
TFE),
end-of-life
FPs,
risk
assessment,
circular
economy,
regulations.
Various
studies
devoted
environments
involving
though
they
present
volume
(with
yearly
production
330,300
t)
compared
all
plastics
460
million
t).
Complementary
reviews
PFASs,
lack
such
above
data,
this
presents
both
fundamental
applied
strategies
as
evidenced
by
major
FP
producers.
Journal of the American Chemical Society,
Journal Year:
2024,
Volume and Issue:
unknown
Published: April 9, 2024
The
C–F
bond
is
the
strongest
covalent
single
(126
kcal/mol)
in
carbon-centered
bonds,
which
highest
electronegativity
of
fluorine
(χ
=
4)
gives
rise
to
shortest
length
(1.38
Å)
and
smallest
van
der
Waals
radius
(rw
1.47
Å),
resulting
enormous
challenges
for
activation
transformation.
Herein,
conversion
was
realized
via
photouranium-catalyzed
hydroxylation
unactivated
aryl
fluorides
using
water
as
a
hydroxyl
source
deliver
multifunctional
phenols
under
ambient
conditions.
featured
cascade
sequences
electron
transfer
(SET)/hydrogen
atom
(HAT)/oxygen
(OAT),
highly
integrated
from
excited
uranyl
cation.
*UO22+
prompted
splitting
mild
photoexcitation,
caging
active
oxygen
peroxo-bridged
manner
critical
OAT
process
releasing
hydrogen
HAT
process.
Energy Technology,
Journal Year:
2024,
Volume and Issue:
12(6)
Published: March 19, 2024
The
adoption
of
microbial
fuel
cell
(MFC)
technology
hinges
on
the
development
efficient
proton‐exchange
membranes
(PEMs),
which
significantly
influences
performance
and
cost.
PEMs
have
a
critical
role
in
preventing
oxygen
crossover,
maintaining
electrochemical
neutrality,
supporting
microorganisms
within
MFCs.
Nafion,
current
industry‐standard
PEM,
grapples
with
environmental,
cost,
issues.
Although
improvements
to
Nafion
been
reported
using
additives,
immersion
heteropolyacids,
different
pretreatment
methods,
UV
irradiation,
many
challenges
still
remain.
Herein,
recent
developments
area
alternative
are
reviewed
analyzed.
Among
them,
sulfonated
aromatic
hydrocarbons,
particularly
polyether
ether
ketone,
emerged
as
top
contenders
terms
scale
up
commercial
viability.
At
same
time,
based
polyvinyl
alcohol,
ionic
liquids,
natural
materials
also
being
actively
researched
for
various
MFC
applications.
Since
most
studies
short
term
lab
scale,
there
is
need
evaluate
long‐term
stability
economic
cost
standardized
parameters
such
power‐to‐cost
normalized
energy
recovery.
Additionally,
emerging
low‐energy‐density
applications
like
biosensors
vivo
power
sources,
PEM
properties
design
be
tailored
carefully.
Nature Communications,
Journal Year:
2024,
Volume and Issue:
15(1)
Published: May 30, 2024
Abstract
Fluorinated
organic
chemicals,
such
as
per-
and
polyfluorinated
alkyl
substances
(PFAS)
fluorinated
pesticides,
are
both
broadly
useful
unusually
long-lived.
To
combat
problems
related
to
the
accumulation
of
these
compounds,
microbial
PFAS
organofluorine
degradation
biosynthesis
less-fluorinated
replacement
chemicals
under
intense
study.
Both
efforts
undermined
by
substantial
toxicity
fluoride,
an
anion
that
powerfully
inhibits
metabolism.
Microorganisms
have
contended
with
environmental
mineral
fluoride
over
evolutionary
time,
evolving
a
suite
detoxification
mechanisms.
In
this
perspective,
we
synthesize
emerging
ideas
on
defluorination/fluorination
resistance
mechanisms
identify
best
approaches
for
bioengineering
new
degrading
making
compounds.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
36(33)
Published: June 19, 2024
Perfluorooctanoic
acid
(PFOA)
is
a
highly
recalcitrant
organic
pollutant,
and
its
bioaccumulation
severely
endangers
human
health.
While
various
methods
are
developed
for
PFOA
removal,
the
targeted
design
of
adsorbents
with
high
efficiency
reusability
remains
largely
unexplored.
Here
rational
synthesis
two
novel
zirconium-based
metal‒organic
frameworks
(MOFs)
bearing
free
ortho-hydroxy
sites,
namely
noninterpenetrated
PCN-1001
twofold
interpenetrated
PCN-1002,
presented.
Single
crystal
analysis
pure
ligand
reveals
that
intramolecular
hydrogen
bonding
plays
pivotal
role
in
directing
formation
MOFs
hydroxy
groups.
Furthermore,
transformation
from
to
PCN-1002
realized.
Compared
PCN-1001,
displays
higher
chemical
stability
due
interpenetration,
thereby
demonstrating
an
exceptional
adsorption
capacity
up
632
mg
g
Chemical Science,
Journal Year:
2024,
Volume and Issue:
15(7), P. 2371 - 2379
Published: Jan. 1, 2024
A
series
of
poly(ester-
b
-carbonate)
electrolytes
are
prepared
by
a
one-pot
procedure
and
structure–property
relationships
observed.
The
polymer
was
used
as
composite
cathode
binder
with
excellent
discharge
capacity
retention.
