Research Article

SiO2-TiO2 Films Supported on Ignimbrite by Spray Coating for the Photocatalytic Degradation of NOx Gas and Methyl Orange Dye

Figure 1

Photographs of (a) ignimbrite, (b) 10TEOS-5TiO2, and (c) 15TEOS-5TiO2 samples.
(a)
(b)
(c)