Analytical Sciences,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 21, 2025
As
one
of
the
most
harmful
heavy
metal
pollutants,
hexavalent
chromium
Cr(VI)
is
becoming
a
serious
threat
to
human
health.
Thus
pursuing
remarkably
sensitive
method
monitor
concentration
in
natural
conditions
favored
for
fast
response
prevent
harm.
In
present
work,
an
ethylenediamine
(En)
and
SiO2-modified
wool
keratin-based
carbon
quantum
dot
(CQD)(En@CQDs@SiO2)
fluorescent
sensor
prepared,
En
found
improve
discrimination
ability
by
binding
with
surface
carboxyl
groups.
Based
on
these
designs,
En@CQDs@SiO2
achieves
significant
improvement
detection
ability,
limit
6.08
×
10–4
mg/L,
which
succeeded
6
times
over
CQDs,
better
than
conventional
UV–Vis
flame
atomic
absorption
(AAS)
techniques.
Furthermore,
has
good
relative
sensitivity,
selectivity,
spectral
reproducibility,
excellent
structural
stability.
These
properties
make
suitable
environmental
detection,
undoubtedly
improves
economy
friendliness
sensor.
The Analyst,
Journal Year:
2023,
Volume and Issue:
148(17), P. 4044 - 4052
Published: Jan. 1, 2023
Heavy
metal
ions,
which
are
over-emitted
from
industrial
production,
pose
a
major
threat
to
the
ecological
environment
and
human
beings.
Among
present
detection
technologies,
achieving
rapid
on-site
of
contaminants
remains
challenge.
Herein,
capillaries
with
three-dimensional
(3D)
hot
spot
constructures
fabricated
achieve
repaid
ultrasensitive
mercury
ion
(Hg2+)
in
water
based
on
surface-enhanced
Raman
scattering
(SERS).
The
4-mercapto
pyridine
(4-Mpy)
serves
as
reporter
high
selectivity,
enabling
Hg2+
by
changes
adsorption
configuration
at
trace
level.
Under
optimized
conditions,
SERS
response
4-Mpy
for
exhibits
good
linearity,
ranging
1
pM
0.1
μM
few
minutes,
limit
0.2
is
much
lower
than
maximum
concentration
10
nM
allowed
drinking
water,
defined
US
Environmental
Protection
Agency
(EPA).
Simultaneously,
combined
theoretical
simulation
experimental
results,
above
results
indicate
that
substrates
possess
outstanding
performances
specificity,
recovery
rate
stability,
may
hold
great
potential
environmental
pollutant
using
portable
spectrometer.
Dalton Transactions,
Journal Year:
2024,
Volume and Issue:
53(6), P. 2541 - 2550
Published: Jan. 1, 2024
Sodium
alginate
gel
using
Tb
3+
as
a
cross-linker
encapsulated
powdered
CsPbI
3
@Pb-MOF
to
construct
ratiometric
fluorescent
sensing
platform
for
sensitive
detection
and
efficient
adsorption
of
Fe
.
Advanced Science,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 2, 2025
Abstract
The
absence
of
the
enhancement
fluorescence
in
carbon
dots
(CDs)
through
doping
with
transition
metal
atoms
(TMAs)
hinders
advancement
multi‐modal
bio‐imaging
CDs
high
photoluminescence
quantum
yield
(PLQY).
Herein,
Mn‐atomically‐doped
R‐CDs
(R‐Mn‐CDs)
a
PLQY
41.3%
water
is
presented,
enabling
efficient
vivo
dual‐mode
fluorescence/magnetic
resonance
(MR)
imaging.
comprehensive
characterizations
reveal
that
incorporation
Mn
leads
to
Mn‐N
2
O
coordinating
structure,
resulting
five
significant
effects:
an
increase
sp
conjugation
domains,
reduction
band
gap,
decreased
oxidation
level,
photo‐excited
electron
numbers,
and
suppression
non‐radiative
relaxation
pathways.
Collectively,
these
factors
contribute
remarkable
R‐Mn‐CDs.
Additionally,
also
endows
R‐Mn‐CDs
superior
MR
imaging
capabilities
due
to,
which
highlights
their
promising
prospect
as
dual‐modal
platform
for
fluorescence/MR
Furthermore,
findings
indicate
introduction
various
TMAs,
such
Mn,
Zn,
Ni,
Cu,
can
universally
improve
water‐soluble
construction
TMAs─O
bonds.
This
research
provides
valuable
theoretical
insights
into
mechanisms
underlying
induced
by
TMAs
offers
guidance
future
design
CDs.
Analytical Sciences,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 21, 2025
As
one
of
the
most
harmful
heavy
metal
pollutants,
hexavalent
chromium
Cr(VI)
is
becoming
a
serious
threat
to
human
health.
Thus
pursuing
remarkably
sensitive
method
monitor
concentration
in
natural
conditions
favored
for
fast
response
prevent
harm.
In
present
work,
an
ethylenediamine
(En)
and
SiO2-modified
wool
keratin-based
carbon
quantum
dot
(CQD)(En@CQDs@SiO2)
fluorescent
sensor
prepared,
En
found
improve
discrimination
ability
by
binding
with
surface
carboxyl
groups.
Based
on
these
designs,
En@CQDs@SiO2
achieves
significant
improvement
detection
ability,
limit
6.08
×
10–4
mg/L,
which
succeeded
6
times
over
CQDs,
better
than
conventional
UV–Vis
flame
atomic
absorption
(AAS)
techniques.
Furthermore,
has
good
relative
sensitivity,
selectivity,
spectral
reproducibility,
excellent
structural
stability.
These
properties
make
suitable
environmental
detection,
undoubtedly
improves
economy
friendliness
sensor.
