Photoelectrochemical experiments under various solar light concentration ratios

Helioman modules can concentrate solar irradiation up to 10 times and offer the possibility to test within a reasonable experimental time the material s and design of new reactors for the solar plants needed in the treatment o f wastewaters. Recently, we have built two photoelectrochemical reactors ad apted to a Helioman collector and we have examined their performances under various solar light concentration ratios, The photocurrent-potential depen dences measured either under global solar light or in concentrated direct s olar light have been found useful for the optimization of photoanode perfor mances, for the choice of reactor materials and improving its design. The a mount of electricity deduced from the photocurrents measured during the who le photooxidation process of pollutants provides a valuable insight on the number of OH. radicals to bf taken into account for the mass balance. All t his data gave us the possibility to improve the efficiency of the photoelec trochemical reactors to be used under low irradiation such as provided by t he parabolic compound collectors (CPCs) planned to be used in solar plants.