Environmental Science & Technology,
Journal Year:
2023,
Volume and Issue:
57(34), P. 12922 - 12930
Published: Aug. 15, 2023
FeOCl
is
a
highly
effective
candidate
material
for
advanced
oxidation
process
(AOP)
catalysts,
but
there
remain
enormous
uncertainties
about
the
essence
of
its
outstanding
activity.
Herein,
we
clearly
elucidate
mechanism
involved
in
FeOCl-catalyzed
perdisulfate
(PDS)
activation,
and
role
surface
hydroxyls
bridging
electron
transfer
between
Fe
sites
PDS
onto
FeOCl/H2O
interface
highlighted.
ATR-FTIR
Raman
analyses
reveal
that
phosphate
could
suppress
activity
via
substituting
hydroxyls,
demonstrating
essential
hydroxyl
activation.
By
use
X-ray
absorption
fine
structure
density
functional
theory
calculations,
found
polar
experienced
prominent
hydrolyzation,
which
enriched
abundant
electrons
within
microarea
around
site,
leading
to
stronger
attraction
PDS.
As
result,
adsorption
was
obviously
enhanced,
bond
length
O–O
adsorbed
lengthened,
from
atoms
also
promoted.
This
work
proposed
new
strategy
PDS-based
AOP
development
hint
building
efficient
heterogeneous
catalysts
regulating
hydroxylation
active
sites.
Environmental Science & Technology,
Journal Year:
2024,
Volume and Issue:
58(24), P. 10415 - 10444
Published: June 7, 2024
Persulfate
(PS)-based
advanced
oxidation
processes
(AOPs)
for
pollutant
removal
have
attracted
extensive
interest,
but
some
controversies
about
the
identification
of
reactive
species
were
usually
observed.
This
critical
review
aims
to
comprehensively
introduce
basic
concepts
and
rectify
cognitive
biases
appeals
pay
more
attention
experimental
details
in
PS-AOPs,
so
as
accurately
explore
reaction
mechanisms.
The
scientifically
summarizes
character,
generation,
different
species.
It
then
highlights
complexities
analysis
electron
paramagnetic
resonance,
uncertainties
use
probes
scavengers,
necessities
determination
scavenger
concentration.
importance
choice
buffer
solution,
operating
mode,
terminator,
filter
membrane
is
also
emphasized.
Finally,
we
discuss
current
challenges
future
perspectives
alleviate
misinterpretations
toward
mechanisms
PS-AOPs.
Heliyon,
Journal Year:
2024,
Volume and Issue:
10(9), P. e30402 - e30402
Published: April 28, 2024
Advanced
oxidation
processes
(AOPs)
are
a
growing
research
field
with
large
variety
of
different
process
variants
and
materials
being
tested
at
laboratory
scale.
However,
despite
extensive
in
recent
years
decades,
many
have
not
been
transitioned
to
pilot-
full-scale
operation.
One
major
concern
the
inconsistent
experimental
approaches
applied
across
studies
that
impede
identification,
comparison,
upscaling
most
promising
AOPs.
The
aim
this
tutorial
review
is
streamline
future
on
development
new
solutions
for
advanced
by
providing
guidance
comparable
scalable
experiments.
We
discuss
developments
catalytic,
ozone-based,
radiation-driven,
other
AOPs,
outline
perspectives
needs.
Since
standardized
procedures
available
we
propose
basic
rules
key
parameters
lab-scale
evaluation
AOPs
including
selection
suitable
probe
compounds
scavengers
measurement
(major)
reactive
species.
A
two-phase
approach
assess
AOP
concepts
proposed,
consisting
(i)
proof-of-concept
(technology
readiness
levels
(TRL)
1-3),
followed
(ii)
intended
water
matrix
cost
comparison
an
established
process,
applying
such
as
UV
fluence
or
ozone
consumption
(TRL
3-5).
Subsequent
demonstration
6-7)
briefly
discussed,
too.
Finally,
highlight
important
tools
thorough
mechanistic
risk
assessment
screening
transformation
products
should
be
based
chemical
logic
combined
complementary
(mass
balance,
calculations).
ACS Catalysis,
Journal Year:
2024,
Volume and Issue:
14(8), P. 6272 - 6291
Published: April 10, 2024
Microcystin-LR
(MC-LR)
is
susceptible
to
degradation
by
singlet
oxygen
(1O2)
attack
due
multiple
unsaturated
olefinic
bond
sites.
In
this
study,
the
Z-scheme
heterojunction
α-Fe2O3/tubular
g-C3N4
with
C
defects
(α-Fe2O3/TDCN)
was
synthesized
via
hydrothermal
and
cocalcination
methods.
The
efficient
generation
of
1O2
realized
enhancing
photogenerated
carrier
separation
adsorption
capabilities
used
investigate
process
mechanism
MC-LR.
results
show
that
rate
MC-LR
can
reach
nearly
100%
within
60
min
under
visible
light
irradiation,
α-Fe2O3/TDCN
possesses
good
stability
environmental
friendliness.
relationship
between
photocatalyst
performance
analyzed
density
functional
theory
(DFT)
calculations.
Based
on
probe
experiments,
LC–MS
data,
DFT
calculations,
mineralization
dominated
analyzed.
This
study
provides
a
reference
for
addressing
pollution
in
eutrophic
aquatic
environments
direction
specific
control
mineralization.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
36(30)
Published: May 14, 2024
Abstract
Atom‐site
catalysts,
especially
for
graphitic
carbon
nitride‐based
represents
one
of
the
most
promising
candidates
in
catalysis
membrane
water
decontamination.
However,
unravelling
intricate
relationships
between
synthesis‐structure–properties
remains
a
great
challenge.
This
study
addresses
impacts
coordination
environment
and
structure
units
metal
central
sites
based
on
Mantel
test,
correlation
analysis,
evolution
sites.
An
optimized
unconventional
oxygen
doping
cooperated
with
Co‐N‐Fe
dual‐sites
(OCN
Co/Fe)
exhibits
synergistic
mechanism
efficient
peroxymonosulfate
activation,
which
benefits
from
significant
increase
charge
density
at
active
regulation
natural
population
orbitals,
leading
to
selective
generation
SO
4
•−
.
Building
upon
these
findings,
OCN‐Co/Fe/PVDF
composite
demonstrates
33
min
−1
ciprofloxacin
(CIP)
rejection
efficiency
maintains
over
96%
CIP
removal
(over
24
h)
an
average
permeance
130.95
L
m
−2
h
work
offers
fundamental
guide
elucidating
definitive
origin
catalytic
performance
advance
oxidation
process
facilitate
rational
design
separation
improved
enhanced
stability.
