Significance of the Nanograin Size on the H₂S-Sensing Ability of CuO-SnO₂ Composite Nanofibers

Figure 2

FE-SEM images of CuO-SnO₂ composite nanofibers calcined at 600°C for (a) 0.5, (b) 12, and (c) 48 h. (d) Summary of the grain size as a function of the calcination time.

(a)

(b)

(c)

(d)