Photoinduced charge transfer between fullerenes and TiO(sub 2) semiconductor colloids

摘要

A photocatalytic method has been presented to carry out one-electron reduction of C(sub 60) and C(sub 70) in 50/50 (v/v) benzene/ethanol. The fullerene reduction was carried out in colloidal TiO(sub 2) suspension using UV excitation. The charge transfer between the excited TiO(sub 2) semiconductor colloid and fullerene molecule occurs with a quantum efficiency of 13% for C(sub 70) and 24% for C(sub 60). Laser flash photolysis measurements have been carried out to elucidate the mechanism of photocatalytic reduction.