Geoscience Reference
In-Depth Information
Number (%)
Number (%)
35
25
30
25
20
15
10
5
0
20
15
Average = 15
Average = 29
μ
m
10
5
0
5 10
15
20
25
30
35
40
45
50
1020304050607080
Length (
μ
m)
Aspect ratio
(a)
(b)
Figure 10.71 Distributions of (a) the length and (b) the aspect ratio of selected whiskers.
Source: Courtesy of W. Suchanek.
Figure 10.72 IR-spectra of the
whiskers which improved
stoichiometry (Ca/P molar
ratios 1.64 and 1.67)
[335]
.
600ºC (1
h)
HPO
2-
600ºC (72
h)
CO
2
(air)
PO
4
H
2
O
CO
2-
OH
-
PO
4
PO
4
OH
-
PO
4
PO
4
3950
2000
1500
1000
400
Wave number (cm
-1
)
There is much scope for the impregnation of a suitable semiconductor onto the
activated carbon surface layers to prepare a carbon/semiconductor photocatalyst.
The adsorption capacities and the feasible removal rates could be substantially
boosted by the impregnation of the activated carbon with suitable semiconductors.