glucose - mediated hydrothermal synthesis and gas sensing characteristics of wo3 hollow microspheres
glucose - mediated hydrothermal synthesis and gas sensing characteristics of wo3 hollow microspheres
... hydrothermal synthesis and gas sensing characteristics of
WO
3
hollow microspheres
Choong-Yong Lee, Sun-Jung Kim, In-Sung Hwang, Jong-Heun Lee
∗
Department of Materials Science and Engineering, Korea ... CuO)
hollow spheres by one-pot hydrothermal reaction of a solution con-
taining metal ions and glucose and subsequent decomposition of
core carbon. In addi...
large - scale synthesis and gas sensing application of vertically
... spectroscopy, and the results indicate that the Co-doped
WO
3
nanostructures are semiconducting with direct band gaps of 2.26eV and 2.77 eV. The gas sens-
ing performance of the as-prepared Co-doped ... the Co-doped WO
3
products. This process is similar to what happens in the synthesis
of WO
3
urchin-like microspheres. Finally, the as-formed urchin-
like microspheres further...
controlled synthesis and gas sensing properties of hollow sea urchin like
... Fe
3+
–H
2
O hydrothermal system. To the
best of our knowledge, this is the first report of the selective
synthesis of ␣-Fe
2
O
3
superstructures and nanocubes. The gas-
sensing properties of the ␣-Fe
2
O
3
superstructures, ... difference in the sensing perfor-
mance of the three kinds of sensors, the BET surface area of the
nanocubes, hollow sea urchin-like nanostru...
hydrothermal synthesis and humidity sensing property of zno nanostructures
... ZnOAIn(OH)
3
nano-
composite samples were also examined. Both prism- and rasp-
berry-like series show similar characteristics. As illustrated, the
UV–V is absorbance spectra of raspberry-like ZnO and nanocom-
posite ... the intensity of UV- and visible-emission peaks of ZnO
increases, in addition two new blue emission bands with a maxi-
mum at 421 nm and 440 nm can also be obse...
electrical and gas - sensing properties of wo3 semiconductor material
... Electrical and gas- sensing properties of WO
3
semiconductor material
Wang Yu-De
*
, Chen Zhan-Xian, Li Yan-Feng, Zhou Zhen-Lai, Wu Xing-Hui
Department of Materials Science and Engineering, ... [15].
4.2. Gas- sensing mechanism
The gas- sensing mechanism is based on the changes
in the conductance of WO
3
. The reducing gas reacted
with oxygen adsorbed on the surface of...
ethanol and ozone sensing characteristics of wo3 based sensors activated by au and pd
... Electrical and optical properties of WO
3
thin films, Thin Solid
Films 397 (2001) 238–243.
[8] W. Yu-De, C. Zhan-Xian, L. Yan-Feng, Z. Zhen-Lai, W. Xing-Hui, Electri-
cal and gas- sensing properties of ... Au/WO
3
and Pd/WO
3
at T
work
= 300
◦
C, and resulting sensing response
“S
gas
” of the sensors calculated by using the relations:
S
gas
=
G
gas
− G
0
G
0
for reduci...
thermal treatment effects on the material and gas-sensing properties of room-temperaturetungstenoxidenanorodsensors
... systematically gas- sensing characteris-
tics such as response magnitude and detection time by means of
careful control of the relative population ratio between W
5+
and
W
6+
states.
The sensing characteristics ... prepared tungsten oxide films by drop-coating
single-crystalline, size-controlled WO
2.72
nanorod solution, and
then investigated the dependence of their material...
gas sensing properties of wo3 doped rutile tio2 thick film at high operating temperature
... oxidizing gases, CO, O
2
and CO
2
, at 600 °C, and a
gas mixture (NO
2
+ oxidizing gases) with CO, O
2
and CO
2
concen-
trations of 1000 ppm, 15% and 10%, respectively. The detection re-
sults of the ... oxidizing gases and
the gas mixture are shown in Figs. 6 and 7.InFig. 6, sensitivities
of the sensor (15 wt.% WO
3
doped TiO
2
) to CO, O
2
and CO
2
were
very small....
acetone sensing characteristics of zno hollow spheres prepared by
... were prep ared by the glucose-
mediated, one-pot hydrothermal synthesis of Z n-coated carb on
spheres and then calcined at 500 1C, the hollow ZnO microspheres
with diameters of 1–2
m
m were gradually ... ZnO hollow
spheres are prepared by the one-pot hydrothermal reaction. The
study focuses on the formation mechanism of ZnO hollow spheres
and the effect of hollow...
gas sensing characteristics and porosity control of nanostructured films
... sized gas molecules like VOCs.
In this study, we fabricated porous gas sensing filmscomposed of
TiO
2
nanotubes prepared by a hydrothermal treatment and studied
the gas sensing properties of the ... film
Hydrothermal treatment
abstract
Preparation and morphology control of TiO
2
nanostructured films for gas sensor applications were inves-
tigated. To examine the effect...
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