136145.fig.006a
(a)
136145.fig.006b
(b)
136145.fig.006c
(c)
136145.fig.006d
(d)
136145.fig.006e
(e)
Figure 6: Surface morphologies of nano-CoOOH with Zn doping concentrations of (a) 1%, (b) 2%, (c) 3%, (d) 4%, and (e) 0%.