Advanced Functional Materials,
Journal Year:
2023,
Volume and Issue:
34(1)
Published: Sept. 21, 2023
Abstract
Adsorption‐photocatalysis
technology
based
on
covalent
organic
frameworks
(COFs)
offers
an
alternative
method
for
advancing
the
field
of
uranium
extraction
from
seawater.
When
determining
photocatalytic
activity
COFs,
binding
energy
excitons
(
E
b
)
functions
is
decisive
factor.
Nevertheless,
majority
reported
COFs
have
a
large
,
which
seriously
restricts
their
application
in
photocatalysis.
Using
practical
π‐skeleton
engineering
strategy,
current
study
synthesizes
three
donor‐acceptor
olefin‐linked
containing
amidoxime
units
effort
to
minimize
.
Theoretical
and
experimental
results
reveal
that
construction
planar
continuous
π
‐electron
delocalization
channels
can
significantly
reduce
promote
separation
electron‐hole
pairs,
thereby
enhancing
activities.
Moreover,
TTh‐COF‐AO
with
‐skeleton
donor
reduced,
exhibits
substantially
smaller
(38.4
meV).
Under
visible
light
irradiation,
high
photo‐enhanced
capacity
10.24
mg
g
−1
achieved
natural
seawater
without
addition
sacrificial
reagents,
superior
been
date.
This
study,
therefore,
paves
way
development
tailored,
efficient
photocatalysts
Biochar,
Journal Year:
2023,
Volume and Issue:
5(1)
Published: June 1, 2023
Abstract
Herein,
a
biochar-based
composite
(Ti
3
C
2
T
x
@biochar-PDA/PEI)
was
constructed
by
decorating
Ti
and
polydopamine
on
coconut
shell
biochar
via
electrostatic
self-assembly
method.
Different
characterization
techniques
were
applied
to
explore
the
structure,
morphology
composition
of
sorbents.
It
found
that
higher
porosity
diverse
functional
groups
conducive
for
@biochar-PDA/PEI
capture
radionuclides,
water
environmental
conditions
made
great
contribution
adsorption
process.
The
process
removing
U(VI)/Cs(I)
well
complied
with
Langmuir
isotherm
Pseudo-second-order
equations,
which
indicated
single
layer
chemical
occurred
solid
liquid
interface.
Meanwhile,
this
produced
exhibited
superior
removal
performance
under
complex
co-existing
ion
environment,
maximum
amounts
U(VI)
Cs(I)
reached
up
239.7
40.3
mg
g
−1
.
Impressively,
adsorbent
still
good
after
three
cycles
regeneration.
spectral
analysis
DFT
calculation
demonstrated
might
be
process,
while
should
exchange
or
attraction.
This
study
potential
application
as
an
effective
remediation
strategy
radioactive
wastewater
cleanup.
Graphical
Angewandte Chemie International Edition,
Journal Year:
2022,
Volume and Issue:
61(47)
Published: Oct. 4, 2022
Lithium-sulfur
(Li-S)
batteries
with
high
energy
density
are
currently
receiving
enormous
attention.
However,
their
redox
kinetics
at
low
temperature
is
extremely
tardy,
and
polysulfides
shuttling
serious
temperature,
which
severely
hinders
the
implementation
of
wide-temperature
Li-S
batteries.
Herein,
we
propose
an
all-climate
battery
based
on
ether-based
electrolyte
by
using
a
porous
sub-nano
aromatic
framework
(SAF)
modified
separator.
It's
demonstrated
that
fully
conjugated
SAF-3
small
pore
size
(0.97
nm)
narrow
band
gap
(1.72
eV)
could
efficiently
block
elevated
boost
conversion
temperature.
Consequently,
cells
work
well
in
wide
ranging
from
-40
to
60
°C.
Furthermore,
when
operated
room
cell
exhibits
90
%
capacity
retention
over
100
cycles
under
high-sulfur
loading
(5.0
mg
cm-2
)
lean
(5
μL
mg-1
).
Advanced Energy Materials,
Journal Year:
2023,
Volume and Issue:
14(5)
Published: Dec. 11, 2023
Abstract
The
development
of
efficient
photocatalysts
for
artificial
photocatalytic
energy
conversion
is
an
intriguing
strategy.
Promisingly,
conjugated
polymers
(CPs)
have
been
actively
investigated
as
alternatives
to
traditional
inorganic
semiconductors
photocatalysis
due
their
molecularly
tunable
optoelectronic
properties,
thus
providing
a
great
platform
molecular
design.
Incorporating
donor
(D)
and
acceptor
(A)
units
into
the
backbone
CPs
ensures
adequate
D−A
interface,
which
essential
facilitating
charge
separation.
This
approach
also
allows
bandgaps
leading
significant
progress
in
conversions
recent
years.
Here,
fundamentals
D–A
type
are
initially
outlined,
followed
by
advanced
experimental
methods
density
functional
theory
(DFT)
calculations
investigating
carrier
dynamics.
Then,
detailed
exposition
synthetic
strategies
carried
out.
Their
extensive
applications
diverse
energy‐related
conversions,
such
hydrogen
evolution,
oxygen
overall
water
splitting,
CO
2
reduction,
N
H
O
evolution
comprehensively
presented.
review
provides
new
comprehensive
insights
molecular‐level
design
catalysts
boosted
conversion,
expected
further
advance
photocatalysis.
ACS Catalysis,
Journal Year:
2024,
Volume and Issue:
14(5), P. 3556 - 3564
Published: Feb. 20, 2024
Electron
delocalization
is
a
versatile
method
to
tune
the
electronic
structure
of
materials
for
maximizing
their
performances.
Herein,
TPBD
covalent
organic
frameworks
(COFs)
with
controlled
electron-delocalization
characteristics
(denoted
as
TPBD-R-COF,
R
=
H,
F,
CN,
and
NO2)
were
synthesized
by
molecular
engineering
systematically
investigate
effect
electron
on
photocatalytic
performance.
We
found
that
performance
can
be
enhanced
modulating
local
in
COFs.
The
activity
TPBD-CN-COF
more
than
12
times
greater
TPBD-H-COF
oxidative
coupling
amines
imines,
where
yield
product
was
increased
from
8
99%.
experimental
results
theoretical
calculations
revealed
optimal
electron-attracting
group
−CN
shows
highest
charge
separation
efficiency
transport
rate,
while
excessive
not
better
such
properties.
Our
findings
provide
strategy
design
optimize
COF-based
catalysts.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(28)
Published: Feb. 15, 2024
Abstract
Photocatalytic
oxygen
(O
2
)
reduction
to
hydrogen
peroxide
(H
O
is
considered
be
a
promising
method
for
energy
storage.
However,
it
suffers
from
the
rapid
recombination
of
carriers,
limited
solubility
and
slow
diffusion
,
self‐decomposition
H
in
traditional
diphase
systems.
Here,
self‐floating
carbon
dots/conjugated
microporous
polymer
(CDs/CMP)
photocatalytic
system
established
production
organic
synthesis.
Due
D–π–A
structure,
porous
hydrophobicity,
CMP
induced
intramolecular
charge
transfer,
exposed
abundant
reaction
sites,
enhanced
adsorption.
CDs
act
as
“bridges”
electron
transmission
regulate
surface
hydrophobicity
CMP,
further
improving
transfer
optimizing
interface.
CDs/CMP
exhibits
high
8542.6
µmol
g
−1
h
concurrent
furoic
acid
at
2.22
m
.
This
rate
≈90%
higher
than
that
system,
exceeding
all
previously
reported
photocatalysts
triphase
Notably,
achieves
relative
separation
suppressing
generated
self‐decomposition.
Theoretical
calculations
situ
characterizations
reveal
mechanism
evolution.
provides
insights
into
exploring
application
metal‐free
heterogeneous
reactions.
