On the mechanism of the cadmium sulphide sensitized photoreduction of heptylviologen in nonaqueous solution

Abstract

The heterogeneous cadmium sulphide (CdS) sensitized photoreduction of heptylviologen (HV²⁺) in deoxygenated non-aqueous solution, which occurs by an electron-transfer process whereby the photo-excited electron in the conduction band of CdS is transferred to adsorbed HV²⁺, is greatly enhanced (> 10²) by the addition of triethanolamine.