Table 3.

Dependency of pH on vanadate redox system. O₂ evolution from solution containing V⁵⁺ ions and TiO₂. Adapted with permission.[qv: 37b] Copyright 2017, American Chemical Society

Entry a)	Photocatalysts	Initial pH	Incident light [nm]	O2 Evolution rate [µmol h−1]
1	TiO2	1.7	>300	64
2	TiO2	6.5	>300	2
3	TiO2	10.9	>300	<1

^a)Reaction conditions: catalyst, 0.4 g; aqueous 2 × 10⁻³ M V⁵⁺ solution; 300 mL; 300 W Xe lamp.