Enhanced Photocatalytic Activity for Degradation of Methyl Orange over Silica-Titania

Table 1

Textural properties of the Rx-SMT powders prepared at 550°C for 1 h.

Samples	Si/Ti molecular ratio by XPS	Surface area (m^2·g^−1)	Average size (nm)
0-SMT	0	20	50.5
0.05-SMT	0.053	160	8.9
0.1-SMT	0.094	196	7.2
0.1-SMT treated by H2SO4 solution	0.093	195	7.2
0.2-Silica titania	0.206	208	6.9