ACS ES&T Engineering,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 18, 2024
Manganese
(Mn)-based
oxides,
mainly
MnO2,
have
garnered
significant
attention
in
catalytic
applications
due
to
their
superior
redox
properties
and
structural
flexibility.
However,
saturated
coordination
structure
presents
challenges
achieving
an
enhanced
performance.
Herein,
a
defective
MnO2
catalyst
(MnO2-D)
was
constructed,
for
the
first
time,
it
proven
effectively
activate
peracetic
acid
(PAA)
complete
degradation
of
sulfamethazine
(SMT).
Compared
with
(i.e.,
perfect
structure,
MnO2-P),
MnO2-D
exhibited
higher
surface
electron
density
abundant
oxygen
vacancies
(OVs),
significantly
improving
its
activity.
Experimental
evidence
revealed
that
OVs
Mn3+
on
were
considered
as
primary
active
sites
MnO2-D/PAA
system
followed
singlet
(1O2)-dominated
nonradical
pathway.
The
can
maintain
activity
minimal
interference
from
inorganic
anions,
humic
acid,
varying
pH
levels,
real
water
environments.
In
addition,
efficient
mitigating
toxicity
SMT
eliminating
diverse
micropollutants.
This
work
enhancement
strategy
constructing
defect-rich
metal
oxide
catalysts
advance
future
treatment
technologies.
