Applied Catalysis B Environment and Energy,
Journal Year:
2023,
Volume and Issue:
342, P. 123457 - 123457
Published: Nov. 1, 2023
In
this
study,
we
developed
a
Cu0.5Fe2.5S4
nanocatalyst
through
facile
sulfidation
of
the
Cu-MIL-88B(Fe)
precursor
to
expedite
surface
Fe(III)
reduction
and
enhance
H2O2
activation
in
heterogeneous
electro-Fenton
(HEF).
The
as-prepared
catalyst
possesses
relatively
large
specific
area
uniformly
dispersed
metal
active
sites.
catalyzed
HEF
system
allowed
compete
removal
naproxen
with
minimal
leaching,
surpassing
that
or
Fe3S4.
Quantitative
XPS
analysis,
electrochemical
characterization
density
functional
theory
calculations
elucidate
an
electron
donor-shuttle
regime
S2-
Cu
species
serve
as
donor
shuttle,
respectively.
significantly
accelerate
internal
transfer
between
S
Fe
mitigate
dissolution
adjacent
iron
sites,
securing
sustainable
reducing
capacity.
Moreover,
Cu0.5Fe2.5S4-based
exhibits
great
practicability
for
treatment
various
organics
urban
wastewater.
This
study
opens
new
avenue
addressing
challenge
sluggish
Fe(III)/Fe(II)
cycling
HEF.
Chemical Engineering Journal,
Journal Year:
2024,
Volume and Issue:
483, P. 149230 - 149230
Published: Jan. 30, 2024
Despite
the
high
density
and
uniform
distribution
of
active
sites
in
metal–organic
frameworks
(MOFs)
their
derivatives,
relatively
low
stability
water
still
limits
utilization
heterogeneous
catalysis.
Herein,
confinement
pyrolyzed
MIL-88B(Fe)
derivatives
within
mesoporous
SiO2
allowed
fabricating
core–shell
nanoreactors
(Fe/C@mSiO2)
that
served
as
electro-Fenton
(HEF)
catalysts
for
first
time,
revealing
an
excellent
performance.
The
as-prepared
were
featured
by
specific
surface
area
dense
sites.
During
service
nanoreactors,
they
behaved
a
dual
function
adsorbent-catalyst,
exhibiting
superior
catalytic
activity
recyclability
compared
to
HEF
without
shell.
Using
0.2
g/L
catalyst,
complete
removal
bisphenol
A
at
pH
6.2
100
mA
was
achieved
120
min,
with
extremely
iron
leaching
0.11
mg/L.
rigid
mSiO2
shell
not
only
protected
from
leaching,
but
it
also
provided
porous
permeable
channels
efficient
mass
transport.
unique
architecture
concentrates
reactants
confined
space,
promoting
fast
degradation
A.
Furthermore,
defect-rich
carbon
substrate
dispersibility
iron-rich
favor
electron
transfer.
treatment
several
organic
micropollutants
consecutive
trials
corroborated
Fe/C@mSiO2.
This
work
contributes
rational
design
catalysts,
aiming
consolidating
practical
application
advanced
wastewater
treatment.
