MORPHOLOGICAL AND PHOTOELECTROCHEMICAL PROPERTIES OF POROUS, SUPERIMPOSED AU TIO2 LAYERS/

Porous semiconducting ceramics deposited on a porous metallic film act ing both as catalyst and electronic collector gave large photocurrents and considerably enhanced electrooxidation currents when irradiated i n the presence of small amounts of alcohol vapours. The morphological properties of these layered materials, was studied by electron (SEM, E SEM) and atomic force (AFM) microscopy in order to observe the modific ation in shape and size of the precursor particles because such knowle dge is helpful to the preparation of suitable anodes for photo-assiste d processes in the gas-phase.