Photocatalytic Decolourization of Direct Yellow 9 on Titanium and Zinc Oxides

Table 4

Influence of an addition of carbonate buffer on pseudofirst-order rate constants 𝑘_app and half-live times 𝑡_1/2 of the photocatalytic degradation of DY9 (80 μmol·L⁻¹).

	Addition of carbonate buffer	𝑘app/min^−1	𝑡1/2/min
TiO2	−	0.0226	31
	+	0.0147	47
ZnO	−	0.0300	23
	+	0.0172	40