Catalysts,
Год журнала:
2024,
Номер
14(10), С. 659 - 659
Опубликована: Сен. 24, 2024
Photoreduction
of
CO2
into
the
chemical
feedstocks
fuels
provides
a
green
way
to
help
solve
both
energy
crisis
and
carbon
emission
issues.
Nevertheless,
undesirable
charge
separation
migration,
as
well
rapid
reverse
recombination
results
in
unsatisfactory
photocatalytic
activity
most
conjugated
microporous
polymers
(CMPs).
Herein,
pair
donor–acceptor
(D-A)
CMPs
for
photoconversion
was
developed
through
position
isomerism
by
altering
linkage
sites.
The
show
that
Py-D27F
with
2,7-site
exhibits
completely
structure
large
molecular
dipole
moment,
thus
significantly
accelerating
transfer.
As
result,
achieves
higher
yield
320.9
μmol
g−1
h−1
CO2-to-CO
photoreduction
(without
addition
any
photosensitizers
precious
metals),
which
is
about
three-fold
greater
than
Py-D36F
(3,6-site
linkage).
This
study
valuable
idea
exploring
outstanding
CMP
photocatalysts
efficient
processing
photocatalysis.
ACS Nano,
Год журнала:
2024,
Номер
18(33), С. 21804 - 21835
Опубликована: Авг. 8, 2024
Covalent
organic
frameworks
(COFs)
are
crystalline
networks
with
extended
backbones
cross-linked
by
covalent
bonds.
Due
to
the
semiconductive
properties
and
variable
metal
coordinating
sites,
along
rapid
development
in
linkage
chemistry,
utilization
of
COFs
photocatalytic
CO2RR
has
attracted
many
scientists'
interests.
In
this
Review,
we
summarize
latest
research
progress
on
for
CO2
reduction.
first
part,
present
COF
linkages
that
have
been
used
CO2RR,
discuss
four
mechanisms
including
as
intrinsic
photocatalysts,
photosensitive
motifs
metalated
semiconductors
heterojunction
photocatalysts.
Then,
principles
structural
designs
functional
building
units
stacking
mode
exchange.
Finally,
outlook
challenges
provided.
This
Review
is
intended
give
some
guidance
design
synthesis
diverse
different
linkages,
various
structures,
divergent
modes
efficient
photoreduction
CO2.
Constructing
a
strong
bonded
interface
is
highly
desired
to
build
fast
charge-transfer
channels
and
tune
reactive
sites
for
optimizing
CO2
photoreduction.
In
this
work,
covalent
triazine
framework
(CTF)
combined
with
Bi19S27Br3
heterojunction
designed
using
an
electrostatic
self-assembly
process.
Due
the
oppositely
charged
states
between
two
components
ultrasonic
treatment,
coupled
realized
formation
of
Bi–C/N/O
bonds,
leading
robust
interfacial
polarization.
This
feature
causes
charge
redistribution,
intensifies
interaction
N
CO2,
stabilizes
intermediate
state,
lowers
reaction
energy
barrier.
Meanwhile,
chemically
favors
rapid
electron
migration
from
CTF,
as
proved
by
ultrafast
transient
absorption
spectroscopy
in
situ
irradiation
XPS.
As
result,
CTF/Bi19S27Br3
delivers
superior
photoreduction
performance
yield
CO
(572.2
μmol
g–1
h–1)
pure
water
system,
which
38.6
times
that
Bi19S27Br3,
apparent
quantum
yields
up
7.9
6.2%
at
380
400
nm,
respectively.
coupling
strategy
provides
accessible
pathway
designing
polarized,
high-efficiency
photocatalysts.
JACS Au,
Год журнала:
2024,
Номер
5(3), С. 1184 - 1195
Опубликована: Дек. 19, 2024
Photocatalytic
reduction
of
CO2
to
value-added
chemicals
is
a
promising
technology
for
reducing
atmospheric
CO2,
but
selectively
producing
specific
product
still
remains
great
challenge.
In
this
study,
Z-scheme
heterojunction,
N-doped
HTiNbO5/NH2-UiO-66(Zr)
(referred
as
NH-NU),
developed
integrate
the
advantages
semiconductor
photocatalysts
and
porous
adsorbents
CO2-to-CH4
conversion.
The
NH-NU
heterojunctions
are
fabricated
via
simple
one-pot
solvothermal
method,
enabling
formation
tight
uniform
interface
between
two
phases,
thereby
facilitating
separation
transfer
photoinduced
charge
carriers,
confirmed
by
TEM,
EPR,
electrochemical
studies,
work
functions.
As
result,
as-prepared
photocatalyst
demonstrates
significant
increase
in
selectivity
CH4
production
through
photoreduction,
achieving
10-fold
enhancement
compared
that
pristine
MOF,
NH2-UiO-66.
Moreover,
there
no
obvious
decrease
photocatalytic
activity
across
four
consecutive
cycles.
situ
FT-IR
spectroscopy
DFT
calculations
reveal
charge-enriched
NH-NU-3
composites
stabilize
various
C1
intermediates
multistep
elementary
reactions,
leading
superior
conversion
process.
This
establishes
efficient
selective
heterogeneous
catalytic
processes
can
be
achieved
stabilization
reaction
designing
suitable
heterojunctions.
ACS Applied Materials & Interfaces,
Год журнала:
2025,
Номер
17(9), С. 13970 - 13979
Опубликована: Фев. 20, 2025
Research
suggests
that
wastewater
is
highly
polluted
by
Hg2+,
threatening
the
sustainability
of
our
environment
and
health
conditions
human
beings.
However,
most
existing
adsorbents
have
a
poor
adsorption
performance
require
expensive
raw
materials.
A
low-cost
adsorbent
material
with
very
high
therefore
an
urgent
need.
In
this
work,
we
successfully
prepared
thiophene-based
porous
triazine
polyamide
(Tb-PTPa)
for
first
time,
using
two
inexpensive
materials
simple
amidation
reaction.
Tb-PTPa
was
then
used
efficient
Hg2+
in
aqueous
media.
The
capacity
up
to
2562
mg
g-1
rate
12.9
min-1.
addition,
shows
good
selectivity
Hg2+.
removal
still
higher
than
91%
after
five
cycles.
interfering
substances
present
water
only
slightly
affect
capture
Tb-PTPa.
combination
experimental
results
density
functional
theory
calculations
clearly
introduction
amide
bonds
can
greatly
enhance
chelating
ability
N
atoms
S
thiophene
Based
on
extensive
investigation,
demonstrated
excellent
properties.
Therefore,
expected
be
new
treatment
wastewater.
