Abstract
Carbon
dots
(CDs)
have
a
wide
light
absorption
range,
which
are
promising
candidates
for
photocatalytic
water
splitting
H
2
evolution,
but
they
show
low
activity
hydrogen
evolution
reaction
(HER)
due
to
the
slow
transfer
efficiencies
of
photogenerated
carriers.
The
electron
cloud
density
photocatalyst
is
essential
separation
and
migration
In
this
study,
effect
mechanism
regulated
by
substituents
with
different
electronic
effects
on
HER
glucose‐based
CDs
clarified.
CDs‐SO
3
CDs‐OH
first
obtained
introducing
electron‐drawing
group
(─SO
H)
electron‐donating
(─OH)
using
tailoring
post‐processing
strategy.
Experimental
results
that
yield
catalyzed
89.95
µmol•g
−1
in
4
h,
about
four
times
CDs,
7.4
CDs‐OH.
─SO
induces
much
negative
energy
band
high
edges,
promoting
carriers;
while
exhibits
positive
charge
an
upward
band,
hindering
surface
complexation
electron‐hole
pairs
HER.
This
study
will
provide
insight
into
design
catalysts
efficient
at
molecular
level.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Авг. 28, 2024
Abstract
Piezocatalytic
Fenton
(PF)
system
emerges
as
a
promising
approach
to
wastewater
treatment
by
leveraging
piezocatalysis
enhance
Fenton‐like
reactions.
However,
conventional
piezocatalysts
encounter
challenges
because
they
often
compromise
catalytic
properties
in
biased
favor
of
superior
piezoelectricity,
resulting
sluggish
kinetics.
To
tackle
this
trade‐off,
here
novel
class
kesterite‐type
narrow
bandgap
piezoelectrics,
Cu
2
XSnS
4
(CXTS,
X
=
Zn,
Ni,
Co),
is
developed
for
PF
reactions,
which
exhibit
unique
combination
physicochemical
attributes
favorable
catalysis
such
(1.2–1.5
eV),
high
free
charge
density
(1
×
10
18
cm
−3
),
mobility,
and
redox
activity
while
retaining
excellent
piezoelectricity
(62–142
pm
V
−1
).
With
the
well‐balanced
piezoelectric,
semiconducting,
properties,
CXTS‐based
systems
demonstrate
outstanding
performance
tetracycline
degradation,
delivering
notable
reaction
kinetics
0.34
min
only
with
minor
H
O
dosage
(1.2
m
outperforming
most
reactions
requiring
large
amount
factor
up
10.
Such
remarkable
fulfilled
simultaneously
effective
activation
situ
generation
reactive
oxygen
species
from
water
via
piezocatalysis.
Additionally,
distinctive
hierarchical
morphology
consisting
2D
nanosheets
enables
easy
crystal
domain
deformation
trigger
piezoelectric
effect,
thereby
drastically
reducing
mechanical
energy
input
required
drive
Rigorous
testing
has
validated
viability
practical
feasibility
system.
The
study
offers
new
design
strategy
highly
efficient
systems,
enabling
cost‐effective
sustainable
approach.
Journal of Materials Chemistry A,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
The
band
structure
is
a
crucial
consideration
in
designing
semiconductor
photocatalysts,
particularly
as
size
has
been
continuously
decreasing
over
the
past
decades.
However,
bandgap
of
nanostructures
usually
broadened...
Materials Science in Semiconductor Processing,
Год журнала:
2024,
Номер
181, С. 108661 - 108661
Опубликована: Июль 1, 2024
Photocatalysis
plays
a
vital
role
in
addressing
environmental
remediation
and
energy
generation.
Carbon
quantum
dots
(CQDs)
represent
superior
category
of
photocatalysts
devoid
metals,
boasting
remarkable
electron
transfer
capabilities,
up-conversion
photoluminescence,
non-toxic
properties.
Notably,
CQDs
can
function
independently
as
or
become
part
composite
photocatalytic
materials.
This
article
explores
the
precursor
materials
used
CQD
production
various
methods
for
preparing
enhanced
with
CQDs,
such
hydrothermal,
solvothermal,
microwave,
chemical
oxidation,
etc.
Furthermore,
we
provide
an
extensive
overview
recent
advancements
pristine,
doped,
CQD-based
photocatalysts,
encompassing
applications
like
organic
pollutant
degradation
water,
hydrogen
production,
CO2
photoreduction
fuel
The
effect
surface
computational
modelling
was
also
addressed.
Finally,
addressed
challenges
potential
research
avenues
CQD-enhanced
photocatalysts.
Sustainability,
Год журнала:
2025,
Номер
17(8), С. 3642 - 3642
Опубликована: Апрель 17, 2025
Metal-doped
carbon
dots
(CDs)
have
become
one
of
the
most
popular
catalytic
materials
for
Fenton-like
reactions,
mainly
due
to
their
low
production
cost,
minimal
toxicity,
and
high
efficiency.
Theses
reactions
not
only
provide
an
efficient
decontamination
method
degradation
organic
pollutants
in
wastewater
but
also
demonstrate
a
wide
range
sensing
applications.
Metal
doping
introduces
new
catalytically
active
centres,
which
increase
binding
selectivity
reactants
offer
additional
advantage
improved
activity.
The
metal-doped
CDs
optimise
electronic
structure
pristine
CDs,
thereby
enhancing
properties
reaction
rates.
These
enhancements
make
them
attractive
option
water
treatment
sensor
design.
objective
this
review
is
comprehensive
overview
current
research
progress
utilisation
as
catalysts
This
examines
advantages
terms
efficiency,
selectivity,
application
scope
discusses
potential
challenges
future
directions.
aim
promote
further
sustainable
green
development
CD
technology
environmental
governance
analytical
chemistry.
