ACS ES&T Engineering,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 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.
Materials,
Год журнала:
2024,
Номер
17(22), С. 5540 - 5540
Опубликована: Ноя. 13, 2024
Waste
drilling
fluids
produced
from
oil
extraction
can
cause
serious
harm
to
the
ecological
environment;
thus,
treatment
of
waste
is
urgent
and
important
ensure
sustainability
development
extraction.
In
this
work,
we
used
Fenton-like
reaction
method
degrade
with
SiO2-supported
MnO2@Fe2O3
composite
material
as
a
catalyst
in
presence
H2O2.
During
process,
interface
exhibits
exceptional
activity
by
facilitating
production
·OH
species
high
strong
oxidizing
properties,
which
organic
substances
into
smaller
inorganic
molecules,
thereby
reducing
its
COD
value.
Compared
only
H2O2,
after
reacting
sufficient
for
4
h
at
60
°C
value
reduced
36,495
mg
L-1,
decrease
more
than
95%.
This
performance
significantly
superior
that
traditional
Fenton
reagent
FeSO4,
32,285
84%.
work
provides
an
catalyst,
practically
useful
fluids.
ACS ES&T Engineering,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 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.
