Luminescence,
Journal Year:
2024,
Volume and Issue:
39(12)
Published: Dec. 1, 2024
ABSTRACT
Herein,
a
kind
of
N‐doped
fluorescent
carbon
dots
(N‐CDs)
were
prepared
by
using
melamine
and
carboxymethyl
cellulose
(CMC)
as
precursors
through
straightforward
hydrothermal
method.
The
designed
sensor
displayed
uniform
nanoscale
distribution,
excellent
hydrophilicity,
strong
fluorescence
emission
with
quantum
yield
37.98%.
Moreover,
the
N‐CDs
could
be
utilized
for
Fe
3+
detection
“On–Off”
transition
via
mechanism
internal
filtration
effect
(IFE)
static
quenching
process.
Two
good
linear
relationships
within
concentrations
from
10
to
100μM
100
500
μM
obtained,
which
indicated
that
quantitative
analysis
calculated
limit
(LOD)
was
0.510
(3σ/slope).
Additionally,
used
in
solid
phase
based
on
strategy,
is
promising
anticounterfeiting
application.
Sustainable Chemistry for the Environment,
Journal Year:
2024,
Volume and Issue:
7, P. 100114 - 100114
Published: June 4, 2024
Carbon
dots
(CDs)
have
been
utilized
as
a
fluorescence
probe
to
detect
heavy
metal
ions.
They
good
optical
qualities
and
are
easily
produced
from
inexpensive
materials.
offer
excellent
photoluminescence
characteristics.
The
characteristics
of
the
CDs
can
also
be
impacted
by
synthesis
procedure.
special
emission
allows
detection
metals,
biological
metals
hypochlorite
anions.
When
used
fluorescent
probes,
provide
for
wide
concentration
range
low
limit.
assemble
actual
examples
electronic
devices
that
intriguing
qualities.
Since,
distinct
excitation-based
emissions
photoluminescence,
quenching
reversing
process
an
analytical
technique
specific
analytes.
extensively
ion
sensors
Fe3+,
Fe2+,
Cu2+,
Hg2+,
Ag+,
Au3+,
Cd2+,
Pb2+,
Cr6+,
Zn2+,
As3+,
V5+,
Mo6+
Al3+
this
review
explains.
comparison
based
on
quantum
yield,
sensitivity,
selectivity,
particle
size,
limit
sensing
mechanisms
described.
Processes,
Journal Year:
2025,
Volume and Issue:
13(1), P. 257 - 257
Published: Jan. 17, 2025
The
need
for
eco-friendly,
cost-effective,
and
scalable
methods
to
synthesize
carbon
quantum
dots
(CQDs)
remains
a
critical
goal
in
nanotechnology.
In
this
work,
nitrogen-doped
(N-CQDs)
were
successfully
synthesized
using
cellulose
nanocrystals
(CNCs)
derived
from
microcrystalline
(MCC)
urea
through
rapid
one-step
microwave-assisted
method.
use
of
renewable
as
precursor
aligns
with
sustainable
practices,
offering
pathway
transform
agricultural
waste
into
valuable
nanomaterials.
Characterized
by
TEM,
XRD,
Raman,
XPS,
PL
spectroscopy,
the
N-CQDs
demonstrated
outstanding
optical
properties,
including
strong
excitation-dependent
fluorescence
an
emission
maximum
at
420
nm.
exhibited
exceptional
selectivity
sensitivity
toward
Fe3+,
achieving
detection
limit
75
nM.
Additionally,
pH-dependent
stability
diverse
conditions
highlight
N-CQDs’
versatility
environmental
monitoring.
This
study
establishes
foundation
produce
high-performance
nanostructures
sensing
applications,
advancing
green
nanotechnology
solutions.
