Photothermal
synergistic
low-temperature
catalytic
volatile
organic
compounds
(VOCs)
degradation
has
an
advantage
on
energy
efficient
and
reduce
carbon
emissions.
Herein,
impregnation
-
pyrolysis
oxidation
strategy
was
adopted
to
synthesis
Pd/Mn3O4
heterojunction
catalyst.
Under
photothermal
condition,
0.60Pd/Mn3O4
catalyst
exhibited
excellent
activity
for
propane
total
oxidation,
with
a
T90
value
of
219.1
°C,
which
115.3
°C
lower
than
Mn3O4.
Enhancement
effect
the
structure
synergy
detected
by
various
characterization
density
functional
theory
calculation.
The
presence
Pd
species
enhanced
reducibility
Meanwhile,
O2
molecules
were
more
easily
activated
at
site
overflow
surface
Mn3O4
reaction.
Besides,
formation
p-n
junction
between
in
promoted
charge
separation
migration
carriers,
boosted
generation
oxygen
free
radical,
resulting
significant
improvement
activity.
Overall,
this
study
provided
new
deep
insight
constructing
enhance
performance
VOC
elimination.
Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: May 2, 2025
Abstract
The
directional
transport
and
precise
control
of
droplets
bubbles
are
crucial
for
future
applications,
but
remain
challenging
due
to
complex
fluid
dynamics
application
limits.
In
light
existing
research
on
droplet
manipulation,
a
MnO
2
/carbon
microsphere
(MnO
/Cs)
covalently
grafted
lubricant‐infused
slippery
surface
(SPM)
is
designed
the
manipulation
bubbles.
structure
morphology
/Cs
examined
using
X‐ray
diffraction
(XRD)
field‐emission
scanning
electron
microscopy
(FESEM),
elemental
composition
chemical
bonds
compounds
characterized
by
photoelectron
spectroscopy
(XPS),
Raman
spectra
Fourier
transform
infrared
spectrometer
(FTIR).
SPM
with
sliding
angle
as
low
3°
prepared.
On
SPM,
rapid
transportation
small
can
be
achieved,
speed
5
µL
reaching
1
mm
s
−1
round‐trip
also
being
feasible.
capable
controlling
100
precision
0.49
,
while
50
directed
load
mg.
Moreover,
volume
20
transported.
Separation and Purification Technology,
Journal Year:
2024,
Volume and Issue:
354, P. 128909 - 128909
Published: July 22, 2024
Manganese
dioxide
(MnO2)
stands
out
as
a
promising
catalyst
for
toluene
degradation
yet
refining
its
synthesis
optimal
efficiency
poses
significant
challenge.
In
this
study,
we
presented
an
up-bottom
approach
ε-MnO2
by
selectively
removing
inactive
La
ions
from
La3Mn2O7
(LLM)
through
acid
etching,
yielding
stacked
nanosheets
with
enriched
oxygen
vacancies.
The
resulting
H2SO4-LLM
exhibited
efficient
synergistic
adsorption-catalytic
oxidation
effects,
attributed
to
exceptional
specific
surface
area
(307.0
m2/g)
and
abundant
acidic
sites,
achieving
almost
90
%
removal
of
2000
mg/m3
(T90)
at
196
℃
complete
CO2
205
°C
space
velocity
18000
mL/(g·h),
outperforming
most
state-of-the-art
catalysts
removal.
study
elucidates
the
role
lattice
in
catalyzing
reveals
intricate
interplay
between
adsorption,
mobility,
redox
capability,
paving
way
development
robust
environmental
remediation.
The
acid
and
redox
sites
of
the
MnCo
catalysts
were
simultaneously
fine-tuned
by
addition
V.
A
dual-function
catalyst,
designated
as
V0.5Mn5Co5,
has
been
constructed
for
synergistic
removal
NOx
volatile
organic
compounds
under
coke-oven
flue
gas
conditions,
which
more
than
95%
conversion
80%
N2
selectivity
at
180-300
°C
it
removes
70%
ethylene
240
°C.
Besides
excellent
sulfur
water
resistance.
characterization
results
demonstrated
that
this
acid-redox
site
modulation
strategy
appropriately
weakened
oxidation
capacity
while
increasing
surface
acidity
catalysts.
mainly
perform
SCR
reaction
through
E-R
mechanism,
N2O
is
generated
transition
dehydrogenation
NH3
NSCR
reaction.
Ethylene(C2H4)
adsorption
oxidative
formation
carbonate
species
with
metal
elements
on
surface,
finally
decomposition
to
CO2.
There
was
a
competitive
C2H4,
there
mutual
inhibition
between
V0.5Mn5Co5
exhibits
VOCs
in
coke
oven
compare
commercial
VWTi
catalysts,
indicating
great
promise
industrial
application.
