In
peroxonosulfate
(PMS)-based
Fenton-like
reaction,
there
were
two
pathways
for
PMS
activation:
radical
path
on
transition
metal
surface
and
non-radical
heteroatom-doped
graphitized
carbon
surface.
this
work,
CoS2/nitrogen-atom
doped
(NC)@SiO2
yolk@shell
nanoreactor
was
designed,
CoS2/NC
surface,
these
paths
performed
parallelly
inside
the
nanoreactor,
leading
to
an
accelerated
tetracycline
degradation
rate.
90.9%
of
removal
efficiency
realized
within
15
min,
much
higher
than
reference
samples,
advantages
illustrated
in
detail.
Moreover,
benefiting
from
SiO2
shell
protection,
leached
cobalt
ion
only
0.27
mg/L,
which
1/20
without
shell.
During
mechanism
study,
activation
identified
by
electron
paramagnetic
resonance
tests,
trapping
experiments
electrochemical
where
SO4•-
1O2
responsible
(TC)
degradation.
This
study
provided
a
new
strategy
simultaneously
accelerate
using
it
might
inspire
other
high
efficient
catalyst
design
PMS-based
reaction.
ACS ES&T Water,
Journal Year:
2024,
Volume and Issue:
4(6), P. 2632 - 2643
Published: May 28, 2024
The
development
of
catalysts
with
high
activity
and
both
economic
environmental
benefits
is
critical
challenging
for
scaling-up
pollutant
treatment.
Herein,
using
Prussian
blue
analogues
as
precursors,
nitrogen-doped
carbon-encapsulated
CoMn
bimetallic
nanocages
(CMNC)
were
successfully
anchored
onto
montmorillonite
(Mt)
to
form
Mt/CMNC-35
nanocomposites.
BPA
degradation
experiments
demonstrated
a
efficiency
96.7%,
total
organic
carbon
removal
rate
81.3%,
chemical
oxygen
demand
92.3%
within
20
min
in
the
presence
peroxymonosulfate
(PMS).
excellent
performance
can
be
attributed
layered
structure
abundant
hydroxyl
groups
Mt,
which
not
only
facilitate
dispersion
immobilization
CMNC
but
also
enhance
mass
transfer
rate.
Mechanism
investigation
uncovered
that
generation
•OH,
SO4•–,
1O2,
O2•–
was
dominated
by
CMNC,
whereas
direct
electron
process
highly
graphitized
layer.
Continuous
revealed
potential
industrial
applications,
efficiencies
100%
>72.0%
50
mg/L
RhB
over
10
days
15
days,
respectively.
Toxicity
analyses
intermediates
Mt/CMNC-35/PMS
system
exhibited
enhanced
detoxification.
present
study
provides
valuable
insights
into
montmorillonite-based
sustainable
wastewater
remediation.
