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

Table 2

The kinetics constants and regression coefficients of methyl orange photocatalysis on Rx-SMT and Degussa P-25 titania.

Photocatalyst	Kinetic constant (min^−1)	r ^2	Ratio of K to 𝐾P25
Rx = 0	𝐾0=0.0015	0.9398	0.0789
Rx = 0.05	𝐾1=0.0234	0.9949	1.2316
Rx = 0.1	𝐾2=0.0296	0.9952	1.5579
Rx = 0.2	𝐾3=0.0149	0.9956	0.7842
Degussa P-25 titania	𝐾P25=0.019	0.9977	1