Nanomaterials,
Journal Year:
2023,
Volume and Issue:
13(20), P. 2753 - 2753
Published: Oct. 12, 2023
In
this
work,
we
employed
a
novel
microwave-assisted
synthesis
method
to
produce
nitrogen
and
boron
co-doped
carbon
dots
(B-N
CDs).
To
achieve
optimal
synthesis,
conducted
comprehensive
parameter
modulation
approach,
combining
various
temperatures,
times,
precursor
concentrations,
while
keeping
the
power
constant
at
150
W
pH
5.
Using
maximum
fluorescence
emission
as
our
response
variable,
best
conditions
were
identified
120
°C,
3
min,
concentration
of
1
mg/mL.
Characterization
using
field
scanning
electron
microscopy
revealed
these
CDs
have
spherical
morphology
with
an
average
size
10.9
±
3.38
nm.
Further
high-resolution
transmission
showed
interplanar
distance
0.23
nm,
which
is
in
line
prior
findings
that
present
0.21
nm
corresponding
(100)
plane
graphite.
Optical
properties
ascertained
through
UV-vis
absorption,
identifying
distinct
π-π*
n-π*
transitions.
Fluorescence
spectroscopy
highlighted
peak
375
when
excited
295
achieving
quantum
yield
56.7%.
Fourier-transform
infrared
Raman
analyses
confirmed
boronic
acid
amine
groups'
presence,
underscoring
graphitic
nature
core
co-doping
nitrogen.
These
empirical
observations
compared
theoretical
investigations
simulated
spectra,
proposing
potential
structure
for
CDs.
X-ray
photoelectron
further
endorsed
boron,
along
detection
specified
functional
groups.
All
characteristics
could
lend
nanomaterial
different
types
applications
such
fluorescent
probes
broad
range
analytes
cell
imaging.
Abstract
The
effective
utilization
and
high‐value
bioproducts
from
agro‐wastes
make
sense
for
a
sustainable
circular
economy
agriculture.
article
discusses
the
promising
potential
of
utilizing
to
produce
bioproducts,
particularly
focusing
on
carbon
dots
(C‐dots)
derived
such
wastes.
These
C‐dots
exhibit
remarkable
fluorescence
properties
excellent
biocompatibility,
making
them
valuable
nanomaterials
various
applications.
dual
sources
these
C‐dots:
green
precursors
sourced
both
edible
non‐edible
plant‐based
materials,
chemical
involving
acid
non‐acid
reagents
are
highlighted.
This
diversity
in
precursor
materials
underscores
versatility
sustainability
C‐dot
production.
Importantly,
synthesis
fluorescent
achieved
quickly
directly
via
hydrothermal
carbonization,
microwave
technique,
thermal
pyrolysis
solvothermal
ultrasonic
process
review
concisely
intended
widespread
application
fields
ranging
bio‐imaging
optoelectronic
devices.
Furthermore,
challenges
associated
with
synthesizing
high‐quality
agro‐residues,
indicating
ongoing
research
efforts
this
area.
Likewise,
key
energy
specific
characteristics
like
optical,
photoluminestic,
photosimulated
electron
transfer,
catalytic,
mechanical,
carcinogenic
attributes
discussed.
Despite
characteristics,
applications
C‐dots,
including
their
use
light‐emitting
diodes,
supercapacitors,
photovoltaics
outlined.
highlights
multifaceted
nature
contribution
advancing
practices
agriculture
while
simultaneously
addressing
needs
sectors.
Overall,
importance
leveraging
development
innovative
environmentally
friendly
contributing
Nanomaterials,
Journal Year:
2023,
Volume and Issue:
13(20), P. 2753 - 2753
Published: Oct. 12, 2023
In
this
work,
we
employed
a
novel
microwave-assisted
synthesis
method
to
produce
nitrogen
and
boron
co-doped
carbon
dots
(B-N
CDs).
To
achieve
optimal
synthesis,
conducted
comprehensive
parameter
modulation
approach,
combining
various
temperatures,
times,
precursor
concentrations,
while
keeping
the
power
constant
at
150
W
pH
5.
Using
maximum
fluorescence
emission
as
our
response
variable,
best
conditions
were
identified
120
°C,
3
min,
concentration
of
1
mg/mL.
Characterization
using
field
scanning
electron
microscopy
revealed
these
CDs
have
spherical
morphology
with
an
average
size
10.9
±
3.38
nm.
Further
high-resolution
transmission
showed
interplanar
distance
0.23
nm,
which
is
in
line
prior
findings
that
present
0.21
nm
corresponding
(100)
plane
graphite.
Optical
properties
ascertained
through
UV-vis
absorption,
identifying
distinct
π-π*
n-π*
transitions.
Fluorescence
spectroscopy
highlighted
peak
375
when
excited
295
achieving
quantum
yield
56.7%.
Fourier-transform
infrared
Raman
analyses
confirmed
boronic
acid
amine
groups'
presence,
underscoring
graphitic
nature
core
co-doping
nitrogen.
These
empirical
observations
compared
theoretical
investigations
simulated
spectra,
proposing
potential
structure
for
CDs.
X-ray
photoelectron
further
endorsed
boron,
along
detection
specified
functional
groups.
All
characteristics
could
lend
nanomaterial
different
types
applications
such
fluorescent
probes
broad
range
analytes
cell
imaging.
