Photocatalytic Decolourization of Direct Yellow 9 on Titanium and Zinc Oxides

Table 2

Pseudofirst-order rate constants 𝑘_app and half-live times 𝑡_1/2 for photocatalytic degradation of DY9 (80 μmol·L⁻¹) upon irradiation with solar simulated light (500 W/m²) at varying catalysts loading (g·L⁻¹).

Catalyst loading/g·L^−1	TiO2		ZnO
	𝑘app/min^−1	𝑡1/2/min	𝑘app/min^−1	𝑡1/2/min
0.1	0.0032	217	0.0049	141
0.5	0.0059	117	0.0124	56
1.0	0.0109	63	0.0138	50
1.5	0.0226	31	0.0300	23