Selective Photooxidation and Photoreduction Processes at 𝐓𝐢𝐨_𝟐 Surface-Modified by Grafted Vanadyl

Table 1

Formation of oxygenated intermediates from cyclohexene photooxidation in TiO₂ P-25 and (VO_𝑥)_𝑛/TiO₂ dispersed in cyclohexene/CH₂Cl² 1 : 3. Irradiation at 𝜆>360 nm for 2 h in the presence of oxygen. The amount of grafted vanadium was 6×10⁻⁵ mol g⁻¹. I = 15 mW cm⁻².

Catalyst 4 g L^−1	Cyclohexenone; (mol L^−1)×10^3	Cyclohexenol; (mol L^−1) × 10^3	Peroxides; (mol L^−1) × 10^3	Alcohol/ketone
TiO2 P-25	19.2	9.2	2.82	0.48
(VO𝑥)𝑛/TiO2	17.2	14.5	2	0.84