Small,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 6, 2024
Abstract
The
direct
photocatalytic
reduction
of
CO
2
in
air
is
the
future
trend
photocatalyst
application.
Herein,
0D
carbon
nitride
quantum
dots
with
nitrogen
vacancies
(V
N
‐CNQDs)
and
2D
bismuth‐deficient
Bi
4
O
5
Br
‐Bi
)
are
integrated
by
hydrothermal
method.
S‐scheme
heterostructure
V
‐CNQDs/V
composite
promotes
separation
rate
photogenerated
carriers
enhances
redox
capacity.
dual
defects
provide
a
large
number
adsorption
catalytic
sites
that
enhance
ability
to
capture
reduce
.
synergistic
effect
defect
engineering
enables
efficiency
photoreduction
reach
16.89
µmol
g
−1
h
55.69
CO2
:
Air
=
3:1
condition,
which
17
21
times
higher
than
,
respectively.
dual‐defective
exhibits
more
lower
energy
barrier
for
forming
*
COOH,
easier
release
gas.
And
it
excellent
cycling
stability
CO.
mechanism
further
analyzed.
This
work
provides
new
perspectives
design
photocatalysts
efficient
photoconversion
at
low
concentrations.
Macromolecular Rapid Communications,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 12, 2025
Abstract
Photocatalytic
production
of
hydrogen
peroxide
(H
2
O
)
represents
a
significant
approach
to
achieving
sustainable
energy
generation
through
solar
energy,
addressing
both
shortages
and
environmental
pollution.
Among
various
photocatalytic
materials,
covalent
organic
frameworks
(COFs)
have
gained
widespread
attention
in‐depth
research
due
their
unique
advantages,
including
high
porosity,
predesignability,
atomic‐level
tunability.
In
recent
years,
progress
has
been
made
in
the
development,
performance
enhancement,
mechanistic
understanding
COF‐based
photocatalysts.
This
review
focuses
on
latest
advancements
H
using
COFs,
particularly
emphasizing
rational
design
COF
structures
regulate
catalytic
exploring
fundamental
processes
involved
photocatalysis.
Based
current
achievements
this
field,
paper
also
discusses
existing
challenges
future
opportunities,
aiming
provide
reference
for
application
COFs
production.
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 24, 2025
Abstract
Photosynthesizing
H
2
O
from
real
seawater
is
a
promising
and
green
avenue
but
suffers
salt‐deactivated
effects
with
limitations
on
stability
photocatalytic
activity.
Herein,
by
the
Pictet–Spengler
reaction,
two
fully
conjugated
thieno[3,2‐c]pyridine‐linked
covalent
organic
frameworks
(named
TBA‐COF
TCA‐COF)
are
synthesized
for
photoproduction
first
time.
Without
sacrificial
agents
in
,
TCA‐COF
exhibit
impressive
generation
rates
of
8878
6023
µmol
g
−1
h
solar‐to‐chemical
conversion
efficiency
0.62%
0.42%,
respectively,
superior
to
their
Schiff
base
analogs.
Further
experimental
theoretical
investigations
reveal
that,
compared
imine‐linkage
counterparts,
one‐pot
cyclized
TCA‐COF,
reaction
improves
charge
carrier
separation
efficiency,
alters
photoreduction
center
triazine
benzene
parts
pyridine
units,
modulates
energy
band
structures
drive
2e
−
oxygen
reduction
water
oxidation
thereby
enhances
photosynthetic
Notably,
seawater‐produced
flow
reactors
packed
can
be
directly
utilized
E.
coli
sterilization.
The
present
study
highlights
construction
robust
COFs
thieno[3,2‐c]pyridine
linkage
via
sustainable
producing
seawater.
Inorganics,
Journal Year:
2024,
Volume and Issue:
12(11), P. 289 - 289
Published: Nov. 4, 2024
This
article
successfully
synthesized
a
series
of
Bi2MoO6/Bi4O5Br2
heterojunctions
using
two-step
solvothermal
method
followed
by
calcination,
and
the
photocatalytic
activity
degradation
tetracycline
hydrochloride
(TC)
was
investigated.
Compared
with
pure
Bi4O5Br2
Bi2MoO6,
exhibit
higher
activity,
which
can
be
attributed
to
heterostructures
strong
interfacial
interaction,
improving
charge
separation.
The
2%
heterojunction
shows
best
under
visible
light
irradiation,
is
1.9
times
1.8
that
Bi2MoO6
Bi4O5Br2,
respectively.
In
addition,
cyclic
experiments
have
shown
has
high
stability,
efficiency
only
decreasing
3%
after
5
cycles.
From
capture
agent
experiment
ESR
test,
it
seen
·O2−
h+
are
main
active
species.
A
possible
mechanism
irradiation
proposed.
