Small,
Journal Year:
2024,
Volume and Issue:
20(32)
Published: March 15, 2024
Abstract
Solar‐driven
carbon
dioxide
(CO
2
)
methanation
holds
significant
research
value
in
the
context
of
emission
reduction
and
energy
crisis.
However,
this
eight‐electron
catalytic
reaction
presents
substantial
challenges
activity
selectivity.
In
regard,
researchers
have
conducted
extensive
exploration
achieved
developments.
This
review
provides
an
overview
recent
advances
efficient
selective
photocatalytic
CO
methanation.
It
begins
by
discussing
fundamental
principles
detail,
analyzing
strategies
for
improving
efficiency
conversion
to
CH
4
comprehensively.
Subsequently,
it
outlines
applications
advanced
characterization
methods
Finally,
highlights
prospects
opportunities
area,
aiming
inspire
into
high‐value
shed
light
on
mechanisms.
Advanced Materials,
Journal Year:
2023,
Volume and Issue:
36(8)
Published: Nov. 22, 2023
Abstract
Semiconductor
photocatalytic
technology
holds
immense
promise
for
converting
sustainable
solar
energy
into
chemically
storable
energy,
with
significant
applications
in
the
realms
of
and
environment.
However,
inherent
issue
rapid
recombination
photogenerated
electrons
holes
hinders
performance
single
photocatalysts.
To
overcome
this
challenge,
construction
2D
S‐scheme
heterojunction
photocatalysts
emerges
as
an
effective
strategy.
The
deliberate
design
dimensionality
ensures
a
substantial
interfacial
area;
while,
charge
transfer
mechanism
facilitates
efficient
separation
maximizes
redox
capabilities.
This
review
commences
fresh
perspective
on
heterojunctions,
followed
by
comprehensive
exploration
preparation
methods
characterization
techniques.
Subsequently,
recent
advancements
are
summarized.
Notably,
behind
activity
enhancement
is
elucidated.
Finally,
prospects
development
presented.
Nature Communications,
Journal Year:
2023,
Volume and Issue:
14(1)
Published: July 3, 2023
Understanding
charge
transfer
dynamics
and
carrier
separation
pathway
is
challenging
due
to
the
lack
of
appropriate
characterization
strategies.
In
this
work,
a
crystalline
triazine/heptazine
carbon
nitride
homojunction
selected
as
model
system
demonstrate
interfacial
electron-transfer
mechanism.
Surface
bimetallic
cocatalysts
are
used
sensitive
probes
during
in
situ
photoemission
for
tracing
S-scheme
photogenerated
electrons
from
triazine
phase
heptazine
phase.
Variation
sample
surface
potential
under
light
on/off
confirms
dynamic
transfer.
Further
theoretical
calculations
an
interesting
reversal
path
light/dark
conditions,
which
also
supports
experimental
evidence
transport.
Benefiting
unique
merit
electron
transfer,
shows
significantly
enhanced
activity
CO2
photoreduction.
Our
work
thus
provides
strategy
probe
mechanisms
design
delicate
material
structures
towards
efficient
Advanced Materials,
Journal Year:
2023,
Volume and Issue:
35(10)
Published: Jan. 2, 2023
The
highly
selective
photoreduction
of
CO2
into
valuable
small-molecule
chemical
feedstocks
such
as
CO
is
an
effective
strategy
for
addressing
the
energy
crisis
and
environmental
problems.
However,
it
remains
a
challenge
because
complex
process
usually
generates
multiple
possible
products
requires
subsequent
separation
step.
In
this
paper,
2D
monolayer
bilayer
porphyrin-based
metal-organic
frameworks
(MOFs)
are
successfully
constructed
by
adjusting
reaction
temperature
solvent
polarity
with
5,10,15,20-tetrakis(4-pyridyl)porphyrin
light-harvesting
ligand.
MOF
low-dimensional
special
structure
in
which
upper
lower
layers
arranged
dislocation
bridged
halogen
ions.
This
exhibits
100%
ultra-high
selectivity
reduction
to
under
simulated
sunlight
without
any
cocatalyst
or
photosensitizer
can
be
recycled
at
least
three
times.
intrinsic
mechanism
photocatalytic
explored
through
experimental
characterization
density
functional
theory
(DFT)
calculations.
work
shows
that
rational
design
number
structures
tune
stability
these
opens
new
avenue
photocatalysts.
Energy & Environmental Science,
Journal Year:
2023,
Volume and Issue:
16(7), P. 2759 - 2803
Published: Jan. 1, 2023
The
catalytic
transformation
of
CO
2
into
valuable
fuels/chemicals
is
a
promising
and
economically
profitable
process
because
it
offers
an
alternative
toward
fossil
feedstocks
the
benefit
transforming
cycling
on
scale-up.
Advanced Materials,
Journal Year:
2023,
Volume and Issue:
35(26)
Published: March 25, 2023
Photocatalytic
CO2
conversion
for
hydrocarbon
fuel
production
has
been
known
as
one
of
the
most
promising
strategies
achieving
carbon
neutrality.
Yet,
its
efficiency
remains
unsatisfactory
mainly
due
to
severe
charge-transfer
resistance
and
slow
charge
kinetics.
Herein,
a
tunable
interfacial
transfer
on
an
oxygen-vacancies-modified
bismuth
molybdate
nanoflower
assembled
by
2D
nanosheets
(BMOVs)
bismuthene
composite
(Bi/BMOVs)
is
demonstrated
photocatalytic
conversion.
Specifically,
meticulous
design
Ohmic
contact
formed
between
BMOVs
can
allow
modulation
resistance.
According
density
functional
theory
(DFT)
simulations,
it
ascertained
that
such
exceptional
kinetics
attributed
built-in
electric
field
(IEF)
contact.
As
such,
reduction
performance
optimized
Bi/BMOVs
(CO
CH4
productions
rate
169.93
4.65
µmol
g-1
h-1
,
respectively)
ca.
10
times
higher
than
pristine
BMO
rates
16.06
0.51
respectively).
The
reported
in
this
work
shed
some
important
light
highly
efficient
photocatalysts
both
energy
environmental
applications.
Angewandte Chemie International Edition,
Journal Year:
2023,
Volume and Issue:
62(50)
Published: Nov. 1, 2023
Cooperative
coupling
of
H2
evolution
with
oxidative
organic
synthesis
is
promising
in
avoiding
the
use
sacrificial
agents
and
producing
hydrogen
energy
value-added
chemicals
simultaneously.
Nonetheless,
photocatalytic
activity
obstructed
by
sluggish
electron-hole
separation
limited
redox
potentials.
Herein,
Ni-doped
Zn0.2
Cd0.8
S
quantum
dots
are
chosen
after
screening
DFT
simulation
to
couple
TiO2
microspheres,
forming
a
step-scheme
heterojunction.
The
configuration
tunes
highly
active
site
for
augmented
evolution,
interfacial
Ni-O
bonds
provide
fast
channels
at
atomic
level
lower
barrier
charge
transfer.
Also,
calculations
reveal
an
enhanced
built-in
electric
field
heterojunction
superior
migration
separation.
Kinetic
analysis
femtosecond
transient
absorption
spectra
demonstrates
that
expedited
electrons
first
transfer
Ni2+
then
sites.
Therefore,
designed
catalyst
delivers
drastically
elevated
yield
(4.55
mmol
g-1
h-1
)
N-benzylidenebenzylamine
production
rate
(3.35
).
This
work
provides
atomic-scale
insights
into
coordinated
modulation
sites
fields
ameliorative
performance.
Chemical Communications,
Journal Year:
2022,
Volume and Issue:
59(6), P. 688 - 699
Published: Dec. 21, 2022
This
feature
article
introduces
the
basic
principles
of
femtosecond
transient
absorption
spectroscopy
(fs-TAS)
and
recent
advances
in
application
fs-TAS
to
heterojunction
photocatalysts.
