Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 30, 2024
Abstract
Despite
the
promising
potential
of
piezo‐catalysis
in
environmental
remediation
applications,
performance
various
piezoelectric
materials
still
suffer
from
low
carrier
concentrations,
limited
mobility,
and
rapid
recombination
electron‐hole
pairs,
reported
modification
strategies
are
quite
intricate
challenging
to
implement.
Herein,
MoS
2
with
varying
degrees
crystallinity
is
synthesized
through
drying
thermal
treatment
processes,
effect
crystal
engineering
on
piezo‐activated
peroxomonosulfate
(PAP)
system
investigated.
The
annealed
at
700
°C
(M‐700)
a
crystallization
60.4%
exhibited
superior
PAP
system,
which
can
degrade
99.6%
bisphenol
A
within
30
min
mineralization
rate
57.0%.
positive
correlation
among
catalysts,
parameters
(
d
33
)
piezo‐catalytic
certain
range
proposed.
From
density
functional
perturbation
theory
(DFPT),
crystalline‐amorphous
hybrid
M‐700
provided
an
appropriate
charge
transfer
rate,
electron
concentration,
mechanical
strength,
more
conducive
stimulate
active
species
chain
reaction
PMS.
This
study
provides
novel
method
for
improving
activities
holds
great
promise
water
pollution
treatment.
This
study
quantifies
the
contribution
of
H2O2-dependent
pathway
to
hydroxyl
radical
(•OH)
production
from
photolysis
dissolved
organic
matter
(DOM).
•OH
formation
rates
were
cross-validated
using
benzoate
and
terephthalate
as
probe
compounds
for
diverse
DOM
sources
(reference
isolates
whole
waters).
Catalase
addition
revealed
that
accounts
10-20%
total
in
isolate
materials,
but
no
significant
correlation
was
observed
between
ambient
iron
(Fe)
concentrations
formation.
lack
likely
due
lower
Fe
levels
isolated
thus
limiting
concentration
photochemically
produced
Fe(II)
available
reaction
with
H2O2.
Notably,
contributed
11
±
3%
Pony
Lake
fulvic
acid,
which
had
lowest
content,
implicating
additional
H2O2-driven
mechanisms
independent
Fe.
Experiments
model
acetophenone
p-benzoquinone
indicated
triplet
reactions
However,
rate
increased
6-fold
when
H2O2
reduced
by
ketyl
radicals
formed
excited
2,4,6-trimethylphenol.
advances
knowledge
photolysis,
providing
insight
into
role
aquatic
photochemical
processes.
Journal of the American Chemical Society,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 17, 2025
Hydroxyl
radical
(·OH)
plays
a
crucial
role
in
atmospheric
chemistry,
regulating
the
oxidative
potential
and
aerosol
composition.
This
study
reveals
an
unprecedented
source
of
·OH
atmosphere:
mineral
dust-bearing
microdroplet
aerosols.
We
demonstrate
that
Kaolin
clay
particles
aerosols
trigger
rapid
production
upon
solar
irradiation,
with
rates
reaching
order
at
least
10-3
M
s-1.
rate
is
several
orders
magnitude
higher
than
bulk
phase
(2.4
×
10-11
s-1)
previously
known
pathways.
On
this
basis,
surface-based
interfacial
estimated
to
be
8.9
10-5
mol
m-2
s-1
air-water-solid
interface
1
μm
sized
particles.
The
enhanced
formation
attributed
unique
features
interfaces,
where
lifespan
photoinduced
holes
was
significantly
increased
due
presence
strong
electric
fields
air-water
interface.
further
investigated
impacts
various
environmental
factors
properties
on
production,
including
light
intensity,
relative
humidity,
particle
size,
pH.
Our
findings
provide
new
insights
into
photochemical
processes
mediated
by
aerosols,
which
are
important
contributors
atmosphere.
work
advances
our
understanding
chemistry
its
profound
lasting
implications
for
air
quality
climate.
Ferrihydrite,
a
poorly
ordered
metastable
iron
oxide,
is
closely
associated
with
dissolved
organic
matter
(DOM)
in
soils
and
sediments.
Although
sunlight-induced
photoreductive
dissolution
of
ferrihydrite
via
ligand-to-metal
charge
transfer
(LMCT)
has
been
extensively
studied,
its
potential
impacts
on
mineralogical
transformation
environmental
behaviors
coexisting
contaminants
remain
largely
unknown.
Here,
we
systematically
investigated
the
effects
parameters
(e.g.,
solution
pH,
pO2
level,
arsenic
speciation,
content)
representative
DOM-oxalate
under
simulated
solar
irradiation.
Results
showed
that
oxalate-mediated
LMCT
process
synchronously
initiated
Fe(II)
production
proton
consumption,
latter
which
facilitated
interfacial
electron
atom
exchange
(IET-AEFh-Fe2+)
processes
among
newly
formed
Fe(II).
At
pH
5.0–8.0,
was
prone
to
transform
into
goethite
due
sufficient
(approximately
80–2700
μM)
from
LMCToxa
enough
affinity
mineral
trigger
IET-AEFh-Fe2+,
while
it
only
underwent
reductive
at
3.0–5.0
or
kept
quasi-steady
state
over
8.0.
Increasing
level
content
hampered
recrystallization
by
reducing
duration
altering
surface
property
ferrihydrite,
whereas
presence
As(III/V)
also
led
formation
lepidocrocite
As(V)
being
more
prominent.
Additionally,
chemical
extraction
As
K-edge
EXAFS
spectroscopy
revealed
consecutively
incorporated
structures
form
regardless
primary
speciation.
These
findings
shed
novel
insights
low-crystalline
oxide
element
migration
driven
sunlight
natural
environments.
Environmental Science & Technology,
Journal Year:
2024,
Volume and Issue:
58(46), P. 20751 - 20760
Published: Nov. 6, 2024
The
dark
generation
of
reactive
oxygen
species
(ROS),
particularly
hydroxyl
radicals
(·OH),
is
crucial
in
the
oxidative
transformation
various
pollutants.
However,
mechanisms
behind
this
process
are
predominantly
linked
to
direct
O
