Chinese Journal of Chemistry,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 21, 2025
Comprehensive
Summary
Photocatalytic
synthesis
of
hydrogen
peroxide
(H
2
O
)
from
air
and
water
presents
a
sustainable
efficient
alternative
to
the
traditional
anthraquinone
method.
Therefore,
design
photocatalysts
for
H
production
are
important.
In
this
work,
we
apply
nitrogen‐site
engineering
strategy
achieve
high‐performance
by
synthesizing
three
imine‐
linked
oligo(phenylenevinylene)‐based
covalent
organic
frameworks
(OPV‐COFs)
doped
with
different
numbers
nitrogen
atoms
(denoted
as
COF‐920‐
n
N,
=
0,
1,
3).
characterization
confirmed
high
crystallinity
porosity
COFs,
critical
photocatalysis.
Each
OPV‐COF
exhibited
ability
rapidly
synthesize
using
water,
COF‐920‐1N
achieving
highest
rate
4288
μmol·g
–1
·h
under
visible
light,
higher
than
those
most
other
reported
COFs.
Mechanism
studies
demonstrated
that
introduction
pyridine
at
junction
changes
electronic
structure
electron
transfer
path
within
enhancing
photogenerated
mobility
reducing
electron‐hole
recombination.
This
study
not
only
pioneers
class
OPV‐COFs
photocatalytic
,
but
also
sets
foundational
rational
COFs
in
applications.
ACS Catalysis,
Год журнала:
2024,
Номер
14(16), С. 12541 - 12550
Опубликована: Авг. 6, 2024
Cooperative
coupling
of
alkene
epoxidation
with
in
situ
H2O2
photosynthesis
is
a
prospective
but
challenging
strategy
for
maximizing
energy
utilization
and
fabricating
value-added
chemicals.
Herein,
covalent
assembly
bipyridine-linked
organic
framework
onto
VNbC
solid-solution
MXene
heterostructures
(COF-TpBpy@VNbC,
TBNV-x)
has
been
constructed,
exhibiting
high
catalytic
activity
selective
styrene
(as
model
reaction)
photogenerated
H2O2.
Significantly,
the
optimal
TBNV-3
composite
achieved
an
impressive
selectivity
99%
nearly
100%
conversion.
Systematic
experimental
characterizations
density
functional
theory
calculations
confirm
that
enhanced
can
be
attributed
to
synergistic
effect
alloying
V–Nb
sites
accelerating
migration
transport
carriers
enhancing
adsorption
styrene.
This
study
provides
implication
designing
innovative
catalysts
by
optimizing
structural
engineering,
highlighting
potential
applications
coupled
photocatalysis.
ACS Sustainable Chemistry & Engineering,
Год журнала:
2023,
Номер
11(35), С. 13096 - 13107
Опубликована: Авг. 23, 2023
The
photocatalytic
production
of
hydrogen
peroxide
(H2O2)
by
graphitic
carbon
nitride
(g-C3N4)
has
been
a
promising
technique.
However,
its
property
is
limited
the
easy
combination
photogenerated
charges,
low
reaction
selectivity,
and
rate
in
O2
reduction
(ORR)
process.
Hence,
nanoreactor
system
designed
constructed
embedding
P,
N
co-doped
nanomaterials
g-C3N4
hollow
sphere.
nanocarbon
as
an
acceptor
transporter
for
photo-generated
electrons
can
inhibit
carriers
with
electron
transfer
from
CNHS
to
N–C.
Particularly,
active
sites
are
beneficial
improve
two-electron
(2
e–)
ORR
selectivity
favorable
formation
hydroperoxo
species
(−OOH).
With
promoted
2
e–
H2O2
confinement
domain
sphere
interior,
resultant
exhibits
high
towards
239.5
μmol
h–1
g–1
pure
water
4568
isopropanol
hole
scavenger,
which
14.1
35.7
times
those
bulk
g-C3N4.
This
study
offers
efficient
avenue
construction
improvement
photocatalysts
insight
into
understanding
production.
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(17), С. 22066 - 22078
Опубликована: Апрель 17, 2024
Development
of
crystalline
porous
materials
for
selective
CO2
adsorption
and
storage
is
in
high
demand
to
boost
the
carbon
capture
(CCS)
technology.
In
this
regard,
we
have
developed
a
β-keto
enamine-based
covalent
organic
framework
(VM-COF)
via
Schiff
base
polycondensation
technique.
The
as-synthesized
VM-COF
exhibited
excellent
thermal
chemical
stability
along
with
very
surface
area
(1258
m2
g–1)
capacity
(3.58
mmol
at
room
temperature
(298
K).
CO2/CH4
CO2/H2
selectivities
by
IAST
method
were
calculated
be
10.9
881.7,
respectively,
which
further
experimentally
supported
breakthrough
analysis.
Moreover,
theoretical
investigations
revealed
that
carbonyl-rich
sites
polymeric
backbone
higher
binding
affinity
energy
(−39.44
KJ
mol–1)
compared
other
aromatic
carbon-rich
sites.
Intrigued
best
selectivity,
utilized
biogas
purification
produced
biofermentation
municipal
waste.
Compared
commercially
available
activated
carbon,
much
better
ability.
This
opens
up
new
opportunity
creation
functionalized
nanoporous
large-scale
waste-generated
biogases
address
challenges
associated
environment.
Chemical Communications,
Год журнала:
2023,
Номер
59(60), С. 9167 - 9181
Опубликована: Янв. 1, 2023
Design
strategies
for
efficient
π-conjugated
polymer-based
photocatalysts,
and
the
progress
achieved
in
light-driven
chemical
transformations
using
them.
Chemistry - A European Journal,
Год журнала:
2023,
Номер
29(66)
Опубликована: Сен. 5, 2023
Abstract
2D
covalent
organic
frameworks
with
Kagome
(
kgm
)
topology
are
a
promising
class
of
crystalline
that
possess
both
triangular
and
hexagonal
pores.
These
dual‐pore
structures
enable
COFs
to
exhibit
unique
advantages
in
selective
separation,
mass
transfer,
targeted
drug
release.
However,
the
synthesis
has
been
hindered
by
reliance
on
empirical
methods.
This
review
systematically
summarizes
conventional
macrocycle‐to‐framework
strategy,
typical
[4+2]
co‐polymerization
synthetic
bifunctional
molecules
self‐condensation
approach
for
constructing
COFs.
Factors
influencing
formation
lattice
surveyed,
such
as
monomer
type,
solvent
polarity,
substrate
concentration,
etc.,
highlight
representative
examples
synthesis.
Additionally,
applications
relationships
between
structure
performances
summarized.
Finally,
key
fundamental
perspectives
proposed
accelerate
further
development
this
intriguing
material.
Inorganic Chemistry,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 6, 2025
Revealing
the
design
and
synthesis
of
precisely
tailored
crystalline
catalysts
for
achieving
efficient
photocatalytic
conversion
styrene
into
high-value-added
products
remains
a
challenging
task.
In
this
work,
highly
stable
polyoxovanadate
functionalized
by
dl-tartaric
acid
ligand
H2[V4O4(H2O)6(tart)2]·H2O
[1,
tart
=
C4H2O6]
was
successfully
synthesized
conventional
aqueous
solution
methods.
The
performance
evaluated
photosynthesis
oxide
employing
an
oxygen
source
as
oxidant
in
visible
light
(>420
nm)
conditions
at
room
temperature
with
compound
1
heterogeneous
catalyst.
Furthermore,
manifested
accomplished
stability
reusability,
maintaining
high
reaction
activity
even
after
three
consecutive
cycles.
This
paper
not
only
contributes
to
broadening
structural
diversity
but
also
sheds
new
on
green
catalytic
conversion.
