Research Article

Photocatalytic Decolourization of Direct Yellow 9 on Titanium and Zinc Oxides

Table 3

Pseudofirst-order rate constants and half-live times for the photocatalytic degradation of DY9 (80 μmol·L−1) at different initial pH.

pHTiO2ZnO
/min−1 /min /min−1 /min

20.0282250.013352
70.0226310.030023
100.0183380.034920