Figure 3
FE-SEM and TEM bright field images of CeO 2 nanospheres. (a) FE-SEM images of CeO2 nanospheres prepared at 200°C for 24 h; (b) TEM bright field images of CeO2 nanospheres prepared at 160°C for 12 h; (c) and (d) are TEM bright field images with corresponding SAED patterns (insets) of CeO2 nanospheres prepared at 200X°C for 12 h.