(a)
(b)
(c)
Figure 5:
TEM micrographs of (a)
S
O
4
−
2
-treated cryptomelane
M
n
O
2
nanostructure, (b)
C
l
−
, treated mixed phase cryptomelane and birnessite
M
n
O
2
nanostructure, and (c)
C
l
O
4
−
-treated dominant birnessite
M
n
O
2
nanostructure. Insets show the corresponding HRTEM images.
