398582.fig.002a
(a) 600°C
398582.fig.002b
(b) 650°C
398582.fig.002c
(c) 700°C
398582.fig.002d
(d) 800°C
Figure 2: SEM images of the products obtained at different synthesis temperatures for 6 h, with 3 : 1 molar ratio of the salt Na2MoO4.