Figure 1From: Enhanced photoelectrochemical and photocatalytic activity of WO3-surface modified TiO2 thin film FESEM images, EDS spectrum, and absorption spectra of TiO 2 and WO 3 /TiO 2 bilayer films. Field emission scanning electron microscopic image of (A) TiO2 film and (B) WO3/TiO2 bilayer film (deposition time = 5 min), (C) EDS spectrum of WO3/TiO2 bilayer film, and (D) absorption spectra of TiO2 and WO3/TiO2 films (deposition time = 5 min).Back to article page