ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(32), P. 42632 - 42640
Published: July 31, 2024
Photoactivation
is
a
phenomenon
that
could
enhance
the
photoluminescence
(PL)
and
photostability
upon
UV/vis
light
exposure,
which
usually
observed
in
CdSe/ZnS
quantum
dots
(QDs).
However,
photoactivation
has
been
scarcely
reported
fluorescent
carbon
(CQDs).
Herein,
nitrogen-doped
(N-CQDs)
were
prepared
through
facile
solvothermal
approach
with
naphthalenetracarboxylic
dianhydride
serine
as
precursors.
Upon
simple
UV
irradiation
for
10
min,
fluorescence
yield
(QY)
of
N-CQDs
increase
up
to
10-fold.
Based
on
this
phenomenon,
explored
an
ultraviolet
(UV)
sensor
assess
intensity
radiation
sunlight
indirectly
evaluate
UV-blocking
efficiency
various
sunscreen
products.
Thus,
contribution
not
only
provided
insight
into
developing
low-cost
detector
but
also
opened
door
development
converse-photobleaching
properties.
Molecules,
Journal Year:
2025,
Volume and Issue:
30(6), P. 1244 - 1244
Published: March 10, 2025
Graphene
quantum
dots
(GQDs)
represent
a
class
of
promising
nanomaterials
characterized
by
adjustable
optical
properties,
making
them
well
suited
for
applications
in
biosensing
and
chemical
detection.
However,
challenges
persist
achieving
scalable,
cost-effective
synthesis
enhancing
detection
sensitivity.
In
this
study,
we
have
developed
simple
environmentally
friendly
method
to
prepare
blue
graphene
dots,
c-GQDs,
using
nitronaphthalene
as
precursor,
yellow
y-GQDs,
doped
acid.
The
yield
is
29.75%,
the
average
thickness
2.08
nm
3.95
nm,
respectively.
synthesized
c-GQDs
exhibit
prominent
cyan
fluorescence
at
wavelength
490
under
excitation
380
while
y-GQDs
show
distinct
540
494
nm.
introduction
p-aminobenzoic
acid
(PABA)
introduced
marked
red
shift
fluorescence,
attributed
electron-withdrawing
effect
carboxyl
groups
on
PABA.
This
key
finding
significantly
enhanced
sensitivity
GQDs
detecting
trace
copper(II)
ions
(Cu2+),
heavy
metal
contaminant
posing
serious
environmental
risks.
was
selectively
quenched
presence
Cu2+,
facilitating
accurate
sensitive
even
complex
ion
matrices.
Mechanistic
studies
revealed
that
quenching
driven
strong
static
interactions,
which
inhibit
non-radiative
transitions.
work
not
only
introduces
scalable
producing
high-performance
but
also
highlights
their
potential
effective
fluorescent
probes
monitoring
Small,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 15, 2024
Abstract
The
electrochemical
activation
of
inert
CO
2
molecules
through
C─C
coupling
reactions
under
ambient
conditions
remains
a
significant
challenge
but
holds
great
promise
for
sustainable
development
and
the
reduction
emission.
Lewis
pairs
can
capture
react
with
,
offering
novel
strategy
electrosynthesis
high‐value‐added
C2
products.
Herein,
an
electron‐beam
irradiation
is
presented
rapidly
synthesizing
metal–organic
framework
(MOF)
well‐defined
(i.e.,
Cu‐
N
pyridinic
).
synthesized
MOFs
exhibit
total
product
faradic
efficiency
70.0%
at
−0.88
V
versus
RHE.
In
situ
attenuated
reflection
Fourier
transform
infrared
Raman
spectra
reveal
that
electron‐deficient
acidic
Cu
sites
electron‐rich
basic
in
ligand
facilitate
targeted
chemisorption,
activation,
conversion
molecules.
DFT
calculations
further
elucidate
electronic
interactions
key
intermediates
reaction.
work
not
only
advances
pair‐site
as
new
platform
conversion,
also
provides
pioneering
insights
into
underlying
mechanisms
irradiated
synthesis
advanced
nanomaterials.
Advanced Science,
Journal Year:
2024,
Volume and Issue:
unknown
Published: July 25, 2024
Lithium-ion
batteries
with
transition
metal
sulfides
(TMSs)
anodes
promise
a
high
capacity,
abundant
resources,
and
environmental
friendliness,
yet
they
suffer
from
fast
degradation
low
Coulombic
efficiency.
Here,
heterostructured
bimetallic
TMS
anode
is
fabricated
by
in
situ
encapsulating
SnS
ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(32), P. 42632 - 42640
Published: July 31, 2024
Photoactivation
is
a
phenomenon
that
could
enhance
the
photoluminescence
(PL)
and
photostability
upon
UV/vis
light
exposure,
which
usually
observed
in
CdSe/ZnS
quantum
dots
(QDs).
However,
photoactivation
has
been
scarcely
reported
fluorescent
carbon
(CQDs).
Herein,
nitrogen-doped
(N-CQDs)
were
prepared
through
facile
solvothermal
approach
with
naphthalenetracarboxylic
dianhydride
serine
as
precursors.
Upon
simple
UV
irradiation
for
10
min,
fluorescence
yield
(QY)
of
N-CQDs
increase
up
to
10-fold.
Based
on
this
phenomenon,
explored
an
ultraviolet
(UV)
sensor
assess
intensity
radiation
sunlight
indirectly
evaluate
UV-blocking
efficiency
various
sunscreen
products.
Thus,
contribution
not
only
provided
insight
into
developing
low-cost
detector
but
also
opened
door
development
converse-photobleaching
properties.
