Recently,
photocatalysis
combined
peroxydisulfate
activation
under
visible
light
(PC-PDS/Vis)
was
developed
as
a
promising
technology
for
removing
antibiotics
in
water.
Herein,
Mn-FeOOH
nanoclusters
were
grown
in-situ
on
the
surface
of
graphitic
carbon
nitride
nanosheets
(CNNS)
using
wet
chemical
method,
which
served
catalyst
to
drive
(PDS)
activation.
Photovoltaic
property
characterizations
revealed
that
Mn-FeOOH/CNNS
demonstrated
superior
capture
ability
and
carrier
separation
efficiency.
Through
DFT
calculations,
it
determined
synergistic
effect
between
Mn
Fe
species
could
enhance
adsorption
PDS.
Thus,
acquired
high
removal
efficiency
99.7%
50
min
tetracycline
(TC)
constructed
PC-PDS/Vis
system.
In
addition,
exhibited
recycling
stability
with
low
iron
leaching,
attributed
interaction
clusters
species.
Lastly,
quenching
experiments
ESR
tests
unveiled
•O2-
played
significant
part
TC
removal,
while
•OH
SO4•-
acted
additional
parameters
contributing
overall
process.
These
discoveries
provide
fresh
outlook
PC-PDS
degradation,
offering
deeper
insights
advancement
sustainable
cutting-edge
wastewater
treatment
technologies.
ACS ES&T Engineering,
Год журнала:
2024,
Номер
4(4), С. 903 - 914
Опубликована: Янв. 30, 2024
Exploring
the
role
of
nonmetal
heteroatoms
doping
in
single-atom
catalysts
for
peroxymonosulfate
(PMS)
activation
is
highly
significant
understanding
and
developing
PMS
activators.
Herein,
a
novel
Mn
(Mn–N4)
catalyst
with
electron-rich
O,
S
self-doping
(MnSA–N–CO,S)
was
synthesized
via
facile
scalable
impregnation-annealing
method,
which
exhibited
admirable
capability
to
activate
ibuprofen
(IBU)
degradation
reaction
constant
as
high
0.225
min–1
(10.32
times
higher
than
carbon
matrix).
It
verified
that
Mn–N4
played
strong
adsorption
capacity
facilitate
electron
transfer
(Mn2+/Mn3+
cycle)
nonradical
process
(1O2
dominated),
active
sites
on
skeleton
made
joint
contribution
IBU
radical
(·OH,
SO4·–,
O2·–
dominated).
Under
this
cooperative
system,
MnSA–N–CO,S
impressive
environmental
resistance
reusability
removal,
well
universality
toward
various
pollutants
considerable
mineralization
efficiency.
This
study
provides
new
insights
into
overlooked
refractory
organics
degradation.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Июнь 4, 2024
Abstract
Hierarchically
porous
silicon
carbide
(SiC)
is
an
important
catalyst
support
widely
used
in
various
gas
and
liquid
catalytic
processes.
Conventional
approaches
to
fabricate
such
SiC
have
limited
design
flexibility
separated
catalyst‐loading
step
necessitated.
Herein,
a
one‐step,
direct
vat‐photopolymerization
3D
printing
of
hierarchically
loaded
with
Co/Ni
based
demonstrated
Pickering
emulsion
as
feedstock
for
the
first
time.
Compared
normal
ceramic
slurries,
dramatically
increases
cure
depth
(by
50%)
stability,
which
allow
continuous
complex
structures
uniform
pore
morphology.
The
resultant
hierarchical
offered
≈40%
better
mechanical
strength
compared
non‐hierarchical
counterpart.
By
dissolving
metal
salts
into
aqueous
phase
emulsions,
architected
Co
or
Ni/Co
situ
matrix
are
printed.
then
thermally
converted
oxides
silicates
catalysts
anchored
on
SiC,
exhibiting
excellent
activity
reusability.
templating
strategy
holds
great
facility
load
highly
attractive
materials
high
entropy
functional
fillers
whilst
reaping
benefits
vat
photopolymerization
myriad
applications
catalysis,
batteries,
structural
supports.
