Photocatalytic H2O2 production using ethanol, 1-butanol and 1-octanol as electron donors was studied both in monophasic and biphasic conditions under vigorous stirring. The light source was a 406 nm LED (bandwidth of 16 nm) with a power density of 4.2 mW cm -2 incident on the irradiated wall of the reaction vessel. The concentration of produced H2O2 was estimated photometrically using titanyl oxysulfate method.