TiO₂/SiO₂ Composite Films Immobilized on Foam Nickel Substrate for the Photocatalytic Degradation of Gaseous Acetaldehyde

Figure 6

FE-SEM images of bare-foam nickel (a), S2 (b), and S2T2 (c). The scale is 200 𝜇m.

(a)

(b)

(c)