Nanoscale,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
Porphyrin-based
COF-OMe
with
a
strong
electron-donating
group
exhibited
the
highest
photocatalytic
activity
among
three
COFs
for
detoxification
of
CEES
in
methanol
solvent.
Nature Communications,
Journal Year:
2024,
Volume and Issue:
15(1)
Published: Aug. 7, 2024
Consecutive
uranium
extraction
from
seawater
is
a
promising
approach
to
secure
the
long-term
supply
of
and
sustainability
nuclear
energy.
Here,
we
report
an
ultra-highly
efficient
strategy
via
studtite
nanodots
growth
with
impressive
uranyl
uptake
capacity
~
154.50
mg/g
natural
in
12
consecutive
days
(i.e.,
average
for
12.875
mg/g/day).
Uranyl
can
be
extracted
as
under
visible
light
reaction
between
adsorbed
photogenerated
H2O2
imine-based
Covalent-Organic
Framework
photocatalysts.
In
detail,
over
Tp-Bpy,
Tp-Bpy-2
Tp-Py
multiple
chelating
sites,
found
which
eluted
readily,
while
Tp-Bd
Tb-Bpy,
transformed
into
nanorods
that
more
inert
elution.
Abundant
sites
structural
regulation
COF
photocatalysts
are
proved
facilitate
formation
elution
nanodots.
The
continuous
desired
sustain
power
technology
development
up-recycle
approaches
remain
challenge.
Here
authors
employing
covalent-organic
frameworks
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.