It
has
been
challenging
for
Fe
(III)
regeneration
in
Fe-based
photocatalysts
continuous
peroxydisulfate
(PDS)
activation
due
to
the
lower
ability
reduce
(III).
In
this
work,
Fe-doped
ultrathin
VO2
(Fe-VO2)
nanobelts
were
synthesized
purifying
metronidazole
(MNZ)
via
PDS
activation.
As
an
efficient
Fenton-like
catalyst
activation,
2
wt%
can
remove
98%
of
MNZ
within
40
min
and
exhibit
impressive
recyclability.
The
synergistic
effect
Fe-VO2
activated
boosted
photocatalytic
performance.
Moreover,
SO4•−,
h+,
O2•−,
1O2,
•OH
main
reactive
radicals.
effects
initial
concentration,
Fe-VO2,
dosage,
various
anions/cations
on
removal
by
Fe-VO2/PDS/Vis
system
studied.
intermediates
degradation
possible
pathways
determined
DFT
calculations
HPLC-MS.
This
study
provided
a
sustainable
technology
applying
decontamination
pharmaceutical
wastewater.
Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 23, 2025
Abstract
A
polyacrylamide
gel
method
has
been
used
to
synthesize
a
variety
of
polyvalent‐transition‐metal‐doped
Ni
position
high
entropy
spinel
oxides
(Ni
0.2
Zn
Mg
Cu
Co
)Al
2
O
4
‐800
°C
(A
)
on
the
basis
NiAl
,
and
catalytic
activity
is
studied
under
synergistic
action
peroxymonosulfate
(PMS)
activation
simulated
sunlight.
The
containing
polyvalent
transition
metals
2+
can
effectively
activate
PMS
efficiently
degrade
levofloxacin
(LEV)
tetracycline
hydrochloride
(TCH)
sunlight
irradiation.
After
90
min
light
exposure,
degradation
percentages
LEV
(50
mg
L
−1
TCH
(100
by
/PMS/vis
system
reach
87.0%
90.2%,
respectively.
superoxide
radicals,
photoinduced
holes,
singlet
dominate
process,
while
hydroxyl
radicals
sulfate
play
only
small
role.
adsorption
energy
charge
density
difference
between
different
systems
are
calculated
functional
theory,
efficiency
combining
with
change
length
O─O
bond
after
adsorption.
mechanism
proposed,
which
provides
new
idea
for
study
in
field
catalysis.
Advanced Sustainable Systems,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 24, 2025
Abstract
This
paper
presents
a
novel
method
for
synthesizing
CoO
x
/Ti
3
AlC
2
composite
catalysts
using
MAX‐phase
Ti
without
etching
the
Al
layer.
By
employing
simple
alkali
precipitation
and
high‐temperature
calcination,
resulting
catalyst
demonstrated
superior
performance
in
peroxymonosulfate
(PMS)
degradation
of
ornidazole
(ONZ)
compared
with
C
(MXene).
The
‐0.05+PMS
achieved
complete
ONZ
(30
mg
L
−1
)
within
30
min,
significantly
outperforming
/MXene‐0.05+PMS,
which
only
91%
removal.
rate
constant
(Kobs)
(0.19325
min
is
nearly
twice
that
/MXene‐0.05+PMS
(0.08412
),
highlighting
crucial
role
layer
activation.
Characterization
revealed
uniform
nanoparticle
dispersion
on
,
/MXene‐0.05
system
high
stability
adaptability
natural
water
minimal
Co
ion
leaching.
Additionally,
radical
scavenging
electron
paramagnetic
resonance
(EPR)
spectroscopy
elucidated
reactive
oxygen
species
(ROS)
generation
mechanisms
identified
11
intermediates,
suggesting
potential
pathways.
approach
eliminated
offered
cost‐effective
environmentally
friendly
synthesis.
