Chemistry Reference
In-Depth Information
Table 11.2
Summary of gas sensors that use hierarchical nanostructures.
Performance
Operating
temperature
(1C)
Response/
recovery time (s)
Sensor type
Structure
Target gas
Gas response
Note
Ref.
a-Fe
2
O
3
2-3 flower-like
C
2
H
5
OH
37.9
1/0.5
280
100 ppm C
2
H
5
OH
21
a-Fe
2
O
3
1-3 thornbush-
like
C
2
H
5
OH
15
1-3/4-8
150
5 ppm C
2
H
5
OH
23
a-Fe
2
O
3
1-3 urchin-like
C
2
H
5
OH
12
2/40
260
100 ppm C
2
H
5
OH
22
SnO
2
/a-Fe
2
O
3
1-3 thornbush-
like
C
2
H
5
OH
6
—
350
100 ppm C
2
H
5
OH
24
SnO
2
2-3 flower-like
C
2
H
5
OH
7.7-33.1
1-3
400
10-50 ppm C
2
H
5
OH
16
SnO
2
2-3 flower-like
C
2
H
5
OH
56.2
—
275
100 ppm C
2
H
5
OH
17
SnO
2
1-3 thread-like
C
2
H
5
OH
3-3.5
(approximately)
0.6/11
300
50 ppm C
2
H
5
OH
18
SnO
2
1-2 dendrite
LPG
20.4
B
3/
B
9
350
liquid petroleum gas (LPG)
2000 ppm (gas response)
1000 ppm (response/
recovery time)
20
SnO
2
1-3 urchin-like
CH
3
COCH
3
5.5
7/10
290
20 ppm CH
3
COCH
3
19
ZnO
1-3 flower-like
C
2
H
5
OH
10.9
5/7
340
20 ppm C
2
H
5
OH
49
B
ZnO
1-3 thornbush-
like
C
2
H
5
OH
10
10 (both)
265
50 ppm C
2
H
5
OH
25
ZnO
2-3 flower-like
C
2
H
5
OH
4
20.7/25.3
(approximately)
280
200 ppm C
2
H
5
OH
50
ZnO
2-3 flower-like
C
2
H
5
OH
177.1
4/357
400
100 ppm C
2
H
5
OH
26
ZnO
1-3 dendrite
H
2
S
17.3
15-20/30-50
30
100 ppm H
2
S
27
WO
3-x
1-3 thornbush-
like
NO
2
2.96
(approximately)
—
200
5 ppm NO
2
51
In
2
O
3
1-3 urchin-like
CO
2.16-3.81
34-38
400
10-50 ppm CO
52
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