Effect of Calcination Temperature on Phase, Morphology, and Optical Properties of TiO2 Nanoparticles and Boron Nitride Decorated TiO2 Nanotubes
ACS Applied Energy Materials,
Год журнала:
2024,
Номер
7(15), С. 6071 - 6083
Опубликована: Июль 26, 2024
In
this
study,
boron
nitride
(BN)
is
synthesized
via
the
hydrothermal
technique
and
subsequently
utilized
to
decorate
TiO2
nanotubes
(BN-TNTs)
by
same
method.
The
materials
are
subjected
heat
treatment
at
temperatures
ranging
from
600
°C
1000
°C.
Notably,
while
literature
extensively
covers
studies
focusing
on
effect
of
temperature
physicochemical
properties
nanoparticles
(NPs),
there
a
scarcity
information
regarding
for
BN-TNTs
composite.
X-ray
diffraction
(XRD)
patterns
revealed
significant
phase
transition
anatase
rutile
900
UV–Vis
diffuse
reflectance
spectroscopy
(UV-DRS)
reveals
that
band
gap
2.826
eV,
exhibit
2.839
eV.
Brunauer–Emmett–Teller
(BET)
analysis
different
calcination
employed
evaluate
pore
size,
specific
surface
area
(SSA),
volume
materials.
High
resolution
transmittance
electron
microscopy
(HR-TEM)
images
show
particle
growth
NPs
change
in
morphology
BN-TNTs.
Through
thermogravimetric
(TGA)
employing
modified
Coast
Redfern
model,
it
was
determined
exhibited
higher
activation
energy
(15
205.69
J/mol)
compared
(10
003.26
J/mol),
indicating
lower
susceptibility
thermal
degradation
greater
requirement
initiating
chemical
transformations.
These
findings
crucial
comprehending
stability
storage
capabilities
these
composites,
thereby
facilitating
optimization
across
spectrum
applications
including
management.
Язык: Английский
Pressure Effects on the Optoelectronic Property of Nanocrystalline Anatase with Different Sizes
The Journal of Physical Chemistry C,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 19, 2024
In
this
study,
we
investigated
the
photoelectric
properties
of
nanosized
anatase
(∼55
and
∼4
nm)
under
high
pressure,
utilizing
in
situ
Raman
spectroscopy,
photocurrent
measurements,
theoretical
calculations
up
to
27.6(5)
GPa.
Our
findings
reveal
that
55
nm
shows
a
significant
increase
2.4
times
compared
ambient
conditions
before
transitioning
columbite
phase
at
around
5.5(1)
After
transition,
gradually
decreased
19.8(4)
Notably,
exhibited
superior
optoelectronic
performance
baddeleyite
observed
approximately
15.5(3)
For
anatase,
an
exceptional
131
was
5.4(1)
GPa
1.5(0)
GPa,
with
only
slight
decrease
between
maintained
level
even
after
pressure
release.
The
variations
are
attributed
changes
resistance,
band
gap,
absorption
coefficient,
each
influencing
material's
response
differently
across
various
ranges.
These
results
underscore
potential
pressure-induced
modulation
dramatically
enhance
especially
anatase.
ability
control
crystal
structure
UV
light
through
offers
promising
strategy
for
improving
TiO2-based
ultraviolet
photodetectors,
making
them
more
effective
advanced
applications.
Язык: Английский