Photocatalytic Active Coatings for Lignin Degradation in a Continuous Packed Bed Reactor

Figure 5

SEM images for uncoated borosilicate sintered glass ((a) and (b)), TiO₂(TiOSO₄ 30.6 wt%) coating on borosilicate glass ((c) and (d)), TiO₂-P25-SiO₂ ((e) and (f)), and ZnO + TiO₂-P25-SiO₂ ((g) and (h)).

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)