Advanced Sustainable Systems,
Journal Year:
2024,
Volume and Issue:
8(12)
Published: Aug. 22, 2024
Abstract
Hydrogen
is
one
of
the
most
promising
alternative
energy
resources
to
replace
fossil
feedstocks,
with
so‐called
“green”
hydrogen,
derived
by
water
splitting
(WS)
using
renewable
electricity
or
sunlight,
sustainable.
Photocatalytic
hydrogen
production,
in
which
sunlight
sole
input,
has
been
extensively
studied,
and
requires
creation
photogenerated
excitons
(through
irradiation
semiconductors)
their
transport
aqueous
media.
Chemical
scavengers,
notably
electron
donating
molecules,
are
widely
used
quench
holes
thereby
suppress
exciton
recombination
otherwise
limits
yield.
Despite
prevalence,
role
significance
such
scavengers
(also
termed
sacrificial
agents)
photocatalytic
WS
remains
poorly
understood,
hindering
rational
selection.
This
review
focuses
on
importance
donors
WS,
participation
reaction
mechanism.
Nano-Micro Letters,
Journal Year:
2023,
Volume and Issue:
15(1)
Published: May 22, 2023
Abstract
Covalent
organic
frameworks
(COFs)
have
emerged
as
a
kind
of
rising
star
materials
in
photocatalysis.
However,
their
photocatalytic
activities
are
restricted
by
the
high
photogenerated
electron–hole
pairs
recombination
rate.
Herein,
novel
metal-free
2D/2D
van
der
Waals
heterojunction,
composed
two-dimensional
(2D)
COF
with
ketoenamine
linkage
(TpPa-1-COF)
and
2D
defective
hexagonal
boron
nitride
(
h
-BN),
is
successfully
constructed
through
situ
solvothermal
method.
Benefitting
from
presence
VDW
larger
contact
area
intimate
electronic
coupling
can
be
formed
between
interface
TpPa-1-COF
-BN,
which
make
contributions
to
promoting
charge
carriers
separation.
The
introduced
defects
also
endow
-BN
porous
structure,
thus
providing
more
reactive
sites.
Moreover,
will
undergo
structural
transformation
after
being
integrated
enlarge
gap
conduction
band
position
TpPa-1-COF,
suppress
electron
backflow,
corroborated
experimental
density
functional
theory
calculations
results.
Accordingly,
resulting
-BN/TpPa-1-COF
heterojunction
displays
outstanding
solar
energy
catalytic
activity
for
water
splitting
without
co-catalysts,
H
2
evolution
rate
reach
up
3.15
mmol
g
−1
,
about
67
times
greater
than
that
pristine
surpassing
state-of-the-art
metal-free-based
photocatalysts
reported
date.
In
particular,
it
first
work
constructing
COFs-based
heterojunctions
help
may
provide
new
avenue
designing
highly
efficient
evolution.
Small,
Journal Year:
2023,
Volume and Issue:
20(2)
Published: Sept. 5, 2023
Abstract
Cyano‐rich
g‐C
3
N
4
materials
are
widely
used
in
various
fields
of
photochemistry
due
to
the
very
powerful
electron‐absorbing
ability
and
electron
storage
function
cyano,
as
well
its
advantages
improving
light
absorption,
adjusting
energy
band
structure,
increasing
polarization
rate
density
active
site
concentration,
promoting
oxygen
activation
ability.
Notwithstanding,
there
is
yet
a
huge
knowledge
break
design,
preparation,
detection,
application,
prospect
cyano‐rich
.
Accordingly,
an
overall
review
arranged
substantially
comprehend
research
progress
position
materials.
An
overview
current
synthesis,
characterization
(determination
their
location
quantity),
reaction
mechanism
analysis
provide
quantity
novel
suggestions
for
cyano‐modified
carbon
nitride
materials'
construction
provided.
In
view
prevailing
challenges
outlooks
materials,
this
paper
will
purify
growth
direction
,
achieve
more
in‐depth
exploration
broaden
applications
Advanced Science,
Journal Year:
2024,
Volume and Issue:
11(29)
Published: May 30, 2024
Abstract
Hydrogen
(H
2
)
has
emerged
as
a
clean
and
versatile
energy
carrier
to
power
carbon‐neutral
economy
for
the
post‐fossil
era.
generation
from
low‐cost
renewable
biomass
by
virtually
inexhaustible
solar
presents
an
innovative
strategy
process
organic
solid
waste,
combat
crisis,
achieve
carbon
neutrality.
Herein,
progress
breakthroughs
in
solar‐powered
H
production
are
reviewed.
The
basic
principles
of
solar‐driven
first
introduced
better
understanding
reaction
mechanism.
Next,
merits
shortcomings
various
semiconductors
cocatalysts
summarized,
strategies
addressing
related
issues
also
elaborated.
Then,
bio‐based
feedstocks
reviewed
with
emphasis
on
effect
photocatalysts
catalytic
systems
performance.
Of
note,
concurrent
value‐added
chemicals
reforming
is
emphasized
well.
Meanwhile,
emerging
photo‐thermal
coupling
that
shows
grand
prospect
maximally
utilizing
entire
spectrum
discussed.
Further,
direct
utilization
hydrogen
green
reductant
producing
via
reactions
highlighted.
Finally,
challenges
perspectives
photoreforming
toward
envisioned.
Desalination and Water Treatment,
Journal Year:
2024,
Volume and Issue:
318, P. 100385 - 100385
Published: April 1, 2024
Graphitic
carbon
nitride
(g-C3N4)
has
been
proven
as
a
potential
photocatalyst
in
the
research
arena
of
water
remediation,
energy
harvesting
and
organic
dye
degradation
etc.
Even
though,
g-C3N4
profound
properties
viz.
photochemical
stability,
intriguing
electronic
band
structures,
suitable
light
harvesting,
bandgap
2.7
eV
even
it
significant
drawbacks
such
poor
disparity,
low
surface
area
high
recombination
rate
photogenerated
electron-hole
pairs
that
leads
to
reduced
photocatalytic
activity.
However,
these
could
be
overcome
by
compositing
with
sulfides,
ferrites
other
metal
oxides
which
provides
charge
separation,
increased
better
absorption.
This
detailed
review
focuses
on
various
synthesis
methods
g-C3N4-based
secondary/ternary
nanocomposite
applications
hydrogen
evolution,
pollutant
degradation,
oxygen
evolution
CO2
photoreduction.
Alongside,
this
critical
also
summarizes
recent
literature
deals
preparation
g-C3N4/polymer
composites
their
storage
environmental
remediation
applications.
Hence,
article
would
attract
broad
range
readers
working
space
based
composite
towards
