473629.fig.004a
(a)
473629.fig.004b
(b)
473629.fig.004c
(c)
473629.fig.004d
(d)
473629.fig.004e
(e)
473629.fig.004f
(f)
Figure 4: Zn transformed into ZnO in 30 mins, (a, b) only NH3.H2O, (a) 0.1 g, (b) 1 g, (c, d) 1 g NH3.H2O, 30 min, (e, f) 0.1 g NH3.H2O, 30 min.