Advanced Engineering Materials,
Journal Year:
2024,
Volume and Issue:
26(10)
Published: April 2, 2024
In
this
article,
the
effect
of
saturated
gases
on
H
2
O
generation
and
dye
degradation
is
examined
using
graphitic
carbon
nitride
(g‐C
3
N
4
)
as
a
piezoelectric
catalyst.
A
detailed
catalytic
evaluation
carried
out
double‐bath
sono‐reactor,
where
performance
g‐C
for
production
rhodamine
B
indigo
carmine
dyes
evaluated
range
catalyst
dosage
levels
gases.
Specific
are
selected
to
understand
their
role
in
sonochemical
reactive
oxygen
species
(ROS)
nitrogen
(RNS)
elucidate
mechanism.
The
use
an
Ar–O
gas
mixture
leads
highest
yield
due
positive
argon
ROS,
respectively.
presence
both
air
Ar–air
increases
since
RNS
improves
conversion
•
OH
into
.
contrast,
negatively
influences
which
results
low
rate
degradation.
work,
new
insights
mechanisms
piezocatalytic
processes
applications
provided.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(14)
Published: Feb. 10, 2024
Abstract
The
synthesis
of
hydrogen
peroxide
through
artificial
photosynthesis
is
a
green
and
promising
technology
with
advantages
in
sustainability,
economy
safety.
However,
superoxide
radical
(⋅O
2
−
),
an
important
intermediate
photocatalytic
oxygen
reduction
to
H
O
production,
has
strong
oxidizing
properties
that
potentially
destabilize
the
catalyst.
Therefore,
avoiding
accumulation
⋅O
for
its
rapid
conversion
paramount
significance
improving
catalyst
stability
yield.
In
this
work,
strategy
was
developed
utilize
protonated
groups
depletion
converted
,
thereby
efficiency
from
CN
successfully
enhanced
by
47‐fold.
experimental
findings
demonstrated
polydopamine
not
only
improved
carrier
separation
efficiency,
more
importantly,
provided
adsorption
active
site
efficient
production.
This
work
offers
versatile
approach
synthesizing
stable
photocatalysts.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(15)
Published: Feb. 15, 2024
Abstract
Photocatalytic
oxygen
reductive
H
2
O
production
is
a
promising
approach
to
alternative
industrial
anthraquinone
processes
while
suffering
from
the
requirement
of
pure
feedstock
for
practical
application.
Herein,
we
report
spaced
double
hydrogen
bond
(IC−H‐bond)
through
multi‐component
Radziszewski
reaction
in
an
imidazole
poly‐ionic‐liquid
composite
(SI‐PIL‐TiO
)
and
levofloxacin
hydrochloride
(LEV)
electron
donor
highly
efficient
selective
photocatalytic
air
production.
It
found
that
IC−H‐bond
formed
by
imino
(−NH−)
group
SI‐PIL‐TiO
carbonyl
(−C=O)
LEV
can
switch
active
sites
characteristic
covered
state
fully
exposed
one
shield
strong
adsorption
N
air,
propel
intenser
positive
potential
more
orbitals
binding
patterns
surface
establish
competitive
selectivity
chemisorption.
Moreover,
high
enrichment
as
site
2e
−
reduction
ensures
rapid
.
Therefore,
enables
total
utilization
conversion
efficiency
94.8
%
direct
reduction,
achieving
rate
1518
μmol/g/h
16
23
times
compared
without
groups
(PIL‐TiO
TiO
,
respectively.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(38)
Published: May 7, 2024
Abstract
Solar‐driven
synthesis
of
hydrogen
peroxide
(H
2
O
)
through
photocatalysis
stands
out
as
a
promising
avenue
for
sustainable
energy
generation,
marked
by
environmental
friendliness
and
industrial
feasibility.
However,
the
inherent
limitations
carbon
nitride
(CN)
in
photocatalytic
H
production
significantly
impede
their
performance.
Herein,
novel
0D/2D
dots‐modified
CN
nanosheet
heterojunction
(CDsMCN)
is
introduced,
synthesized
hydrothermal‐calcination
tandem
strategy
induced
CDs
derived
from
melamine.
This
innovative
technique
enhances
n→π*
electronic
transition
CDsMCN,
accelerating
separation
efficiency
electron‐hole
pairs,
boosting
oxygen
adsorption,
promoting
highly
selective
2e
−
ORR.
Comparative
to
pristine
CN,
10
MCN
exhibited
remarkable
tenfold
increase
production,
reaching
an
impressive
1.48
mmol
L
−1
.
Furthermore,
demonstrates
exceptional
stability,
maintaining
its
catalytic
at
initial
level
over
four
consecutive
cycles.
The
notable
achievement
molar
selectivity
≈80%
onset
potential
0.6
V
(vs
RHE)
underscores
ability
produce
desired
product
selectively.
Advanced
situ
characterization
together
with
DFT
calculations
revealed
that
ultrathin
enhanced
improves
optical
properties,
reduces
bandgap,
facilitates
fast
charge
migration,
increases
performance,
thereby
serving
candidate
advanced
applications.
Catalysts,
Journal Year:
2023,
Volume and Issue:
13(10), P. 1325 - 1325
Published: Sept. 27, 2023
Hydrogen
peroxide
(H2O2)
is
a
clean
and
mild
oxidant
that
receiving
increasing
attention.
The
photocatalytic
H2O2
production
process
utilizes
solar
energy
as
an
source
H2O
O2
material
sources,
making
it
safe
sustainable
process.
However,
the
high
recombination
rate
of
photogenerated
carriers
low
utilization
visible
light
limit
H2O2.
S-scheme
heterojunctions
can
significantly
reduce
electron–hole
pairs
retain
reduction
oxidation
capacity
due
to
presence
internal
electric
field.
Therefore,
necessary
develop
heterojunction
photocatalysts
with
simple
preparation
methods
performance.
After
brief
introduction
basic
principles
advantages
heterojunctions,
this
review
focuses
on
design
application
in
production.
This
paper
concludes
challenge
prospect
