Photoelectrochemical behavior of composite metal oxide semiconductor films with a WO3 matrix and occluded Degussa P 25 TiO2 particles

Electrodeposition of Semiconductors

“…In each of these examples the second component listed serves as the matrix or ''glue'' to bind the occluded particles to the underlying substrate and in all cases the matrix was cathodically electrodeposited. The photoelectrochemical and photocatalytic behavior of the resultant nanocomposite films was characterized in these studies [316][317][318][319]. The ability of these films to decompose organic pollutants under UV excitation was also probed in one of the studies [319].…”

Photoelectrochemical Behavior of Nanostructured WO3 Thin‐Film Electrodes: The Oxidation of Formic Acid

“…The prevalence of diffusion in the electron transport within the electrodeposited WO 3 thin films has been considered recently by de Tacconi and co-workers. [35] The assumption that photogenerated holes within the system are rapidly trapped by electrolyte species and do not contribute to the photocurrent is implicit in Equation (4). Transport in the porous electrolyte network, although not explicitly considered, could be included by using an effective diffusion coefficient and taking into account an ambipolar transport process.…”

“…[34] In addition, the photoelectrochemistry of electrodeposited WO 3 nanostructured thin films as regards water and simple organic photooxidation has been investigated in connection with the behavior of TiO 2 /WO 3 nanocomposite electrodes. [35,36] From a broader perspective, a number of articles have appeared on the behavior of nanostructured electrodes used as photoanodes for the oxidation of organic species dissolved in water. [37][38][39][40][41][42][43][44][45][46] Prompted by the relative paucity of photoelectrochemical studies on the behavior of WO 3 thin layers prepared on fluorine tin oxide (FTO) conducting glass, we have addressed the photooxidation of a model organic molecule (formic acid) as a way of understanding their behavior and assessing the prospects of utilizing electrosynthesized layers in practical photoelectrocatalytic devices.…”

Structure, Morphology, and Band Gap of Ti-V-O Mixed Oxides Processed by Coprecipitation and Calcination

“…Mixing VO 2 and V 2 O 5 with TiO 2 together, with similar positions in their conduction and valence band energies, can increase the spectral range of absorption as well as create type II electronic architecture. This structure can separate and/or localize electron and hole wave functions in the core or shell materials, thereby extending excitation lifetime and photoelectrical efficiency [7]. Since it is possible to increase electron/hole life time by separation of charges, it may be also possible to increase conductivity by electrons and holes through the particles of the TiO 2 /VO 2 /V 2 O 5 phases.…”