Geoscience Reference
In-Depth Information
Figure 10.32. FESEM and TEM photographs of Fe
3
O
4
nanorods.
Source: Photographs courtesy of Prof. Y.T. Qian.
water causes the metal hydroxides to rapidly dehydrate before significant growth
takes place. The two overall reactions that lead from metal salts to metal oxides are
hydrolysis and dehydration:
M
ð
NO
3
Þ
2
1
xH
2
O
!
M
ð
OH
Þ
x
1
xHNO
3
M
ð
OH
Þ
x
!
MO
x
=
2
1
1
=
2xH
2
O
Recently, Lester et al. [151] reported a new design that employs a nozzle mixer
to exploit differences in the densities of supercritical water and precursor solutions
