Photocatalytic and Photographic Heterojunctions

摘要: The fields of photo-assisted heterogeneous catalysis and silver halide based photographic systems have a number common features. They both utilize particulate semiconducting materials to absorb the incident radiation produce photoelectrons photoholes. Recombination these charge carriers is counter productive, since they are reagents relied upon for initiation subsequent events crucial overall process efficiency. From this perspective, it not unusual that progress in seemingly diverse proceeding similar directions. In heterojunction structures employed promote separation on supposition will increase efficiency — as measured by increased product yield photocatalysis Ag+ ion reduction systems. determination time resolved transport parameters has been recognized essential achievement detailed understanding photophysics chemistry Their nature places special demands techniques characterization electronic properties interaction ionic with other chemical species. field imaging, photocharge technique (TRPC) applied investigation what termed diodes transistors. Descriptions formulation be given intent illustrating similarities approaches being taken photocatalysis. Recent TRPC measurements TiO2 Pt/TiO2 also discussed.