Small,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 14, 2024
Abstract
Metal
nitrogen
carbon
(MNC)‐based
Fenton
reactions
leveraged
with
robust
peroxymonosulfate
(PMS)
interaction
effectively
guarantee
the
elimination
of
refractory
contaminants,
yet
precise
design
local
microenvironment
MNC
to
couple
multiple
PMS
activation
pose
major
challenges.
Herein,
a
porous
Co
single‐atom
catalyst
(SAC)
defects
(N
v
)
(MCo/NC‐6)
is
fabricated
initiate
oxidation
reaction.
The
weaker
but
richer
coordination
between
and
N
in
precursor
facilitates
formation
structure
during
pyrolysis,
achieving
simultaneously
electronic
spatial
distribution
tuning.
Compared
SAC
(ZCo/NC‐6),
optimized
MCo/NC‐6
significantly
increase
bisphenol
A
(BPA)
reactivity
(
k
=
0.63
min
−1
),
utilization
(78%),
singlet
oxygen
1
O
2
yield
(100%)
by
15.3,
2.4,
2.6
times,
respectively.
Experimental
analyses
theoretical
calculations
reveal
that
Co─N─C
regulated
both
micro
space
neighboring
endowed
high‐mobility
electrons,
thus
synergistically
facilitating
rapid
generation
efficient
.
This
work
promises
new
opportunities
for
microenvironments‐regulated
SACs,
charts
trajectories
complex
Fenton‐like
systems.
Langmuir,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 5, 2025
Cobalt-based
metal–organic
framework
(MOFs)-derived
catalysts
are
acknowledged
for
their
effectiveness
in
activating
peroxymonosulfate
(PMS)
the
treatment
of
persistent
pollutants.
However,
limited
adsorption
PMS
on
catalyst
surface
markedly
reduces
its
degradation
efficiency.
To
overcome
this
limitation,
nanoflower-like
Eu2O3/Co3O4-0.3
were
successfully
fabricated
by
incorporating
europium
(Eu)
into
cobalt-based
MOF
via
hydrothermal
and
calcination
techniques.
The
doping
Eu
not
only
enhances
more
catalyst's
but
also
serves
as
an
electron
transfer
mediator
to
regulate
Co2+/Co3+
redox
cycle
promote
generation
oxygen
vacancies
(OV).
was
used
activate
rhodamine
B
(RhB),
it
found
that
rate
constant
(k)
Eu2O3/Co3O4-0.3/PMS
system
approximately
8
times
higher
than
Co3O4/PMS
system,
achieving
complete
within
20
min.
Furthermore,
exhibited
excellent
mineralization
capacity,
stability,
recyclability.
Trapping
experiments
indicated
singlet
(1O2)
is
primary
active
species,
suggesting
material
applicable
complex
aqueous
environments.
Density
Functional
Theory
(DFT)
calculations
revealed
energy
(Eads)
Eu2O3
−4.05
eV,
which
much
greater
Co3O4
(Eads
=
−0.32
eV).
This
study
provides
a
new
method
designing
nonhomogeneous
efficient
