Nanomaterials,
Год журнала:
2024,
Номер
14(16), С. 1370 - 1370
Опубликована: Авг. 21, 2024
The
present
study
investigates
the
photocatalytic
properties
of
hydrothermally
synthesized
TiO2
nanowires
(NWs)
for
CO2
reduction
in
H2O
vapor.
It
has
been
demonstrated
that
NWs,
thermally
treated
at
500–700
°C,
demonstrate
an
almost
tenfold
higher
yield
products
compared
to
known
commercial
powder
P25.
found
best
material
is
a
combination
anatase,
TiO2-B
and
rutile.
product
increases
with
increasing
heat
treatment
temperature
NWs.
This
associated
increase
degree
crystallinity
material.
shown
vapor
achieved
when
NW
photocatalyst
heated
100
°C.
ACS Applied Materials & Interfaces,
Год журнала:
2023,
Номер
15(3), С. 4329 - 4342
Опубликована: Янв. 9, 2023
Hollow
In2O3@TiO2
double-layer
nanospheres
were
prepared
via
a
facile
water
bath
method
using
the
sacrifice
template
of
carbon
nanospheres.
It
is
shown
that
size
In2O3/TiO2
nanocomposites
150-250
nm,
thickness
In2O3
shell
about
10
and
TiO2
15
nm.
The
sensing
performances
synthesized
nanocomposites-based
chemiresistive-type
sensor
to
formaldehyde
(HCHO)
gas
under
UV
light
activation
at
room
temperature
have
been
studied.
Compared
pure
In2O3-
TiO2-based
sensors,
nanocomposite
exhibits
much
better
formaldehyde.
response
nanocomposite-based
1
ppm
3.8,
time
recovery
are
28
50
s,
respectively.
detectable
concentration
can
reach
as
low
0.06
ppm.
role
formed
heterojunctions
involved
chemical
reactions
activated
by
investigated
AC
impedance
spectroscopy
in
situ
diffuse
reflectance
Fourier
transform
infrared
spectroscopy.
improvement
properties
could
be
attributed
nanoheterojunctions
between
two
components
"combined
photocatalytic
effects"
UV-light-emitting
diode
irradiation.
Density
functional
theory
calculations
demonstrated
introducing
improve
adsorption
energy
charge
transfer
materials.
Nanotechnology,
Год журнала:
2023,
Номер
34(25), С. 255501 - 255501
Опубликована: Март 23, 2023
Detection
of
hazardous
toxic
gases
for
air
pollution
monitoring
and
medical
diagnosis
has
attracted
the
attention
researchers
in
order
to
realize
sufficiently
sensitive
gas
sensors.
In
this
paper,
we
fabricated
characterized
a
Titanium
dioxide
(TiO2)-based
sensor
enhanced
using
gold
nanoparticles.
Thermal
oxidation
sputter
deposition
methods
were
used
synthesize
sensor.
X-ray
diffraction
analysis
was
determine
anatase
structure
TiO2samples.
It
found
that
presence
nanoparticles
on
surface
TiO2enhances
sensitivity
response
sensors
by
up
about
40%.
The
showed
1.1,
1.07
1.03
50
ppm
acetone,
methanol
ethanol
vapors
at
room
temperature,
respectively.
Additionally,
reduce
s
time
(about
50%
reduction)
vapor;
demonstrated
recovery
decorated
TiO2sensor
is
less
than
40
s.
Moreover,
explain
improved
performance
depends
adsorption-desorption
mechanism,
chemical
sensitization
electronic
Chemosensors,
Год журнала:
2023,
Номер
11(4), С. 258 - 258
Опубликована: Апрель 21, 2023
In
this
work,
MXene/NiO-composite-based
formaldehyde
(HCHO)
sensing
materials
were
successfully
synthesized
by
an
in
situ
precipitation
method.
The
heterostructures
between
the
MXene
and
NiO
nanoparticles
verified
transmission
electron
microscopy
(TEM),
X-ray
diffraction
(XRD),
photoelectron
spectroscopy
(XPS).
HCHO
performance
of
MXene/NiO-based
chemiresistive-type
sensors
was
investigated.
Compared
to
pure
materials,
MXene/NiO-P2-based
sensor
gas
at
room
temperature
significantly
enhanced
formation
MXene/NiO
heterojunctions.
response
MXene/NiO-P2
50
ppm
8.8,
which
much
higher
than
that
NiO.
At
temperature,
detectable
concentration
1
ppm,
recovery
time
2
279
s
346
s,
respectively.
also
exhibited
a
good
selectivity
long-term
stability
for
56
days.
Fourier
transform
infrared
(FTIR)
spectra
sensor,
when
exposed
different
times,
investigated
verify
adsorption
reaction
products
molecules.
