Preparation and photoelectrocatalytic activity of Pt(TiO2)–TiO2 hybrid films

• Published in: Thin solid films 2006-05, Vol.503 (1-2), p.1-7
• Main Authors: He, Chun, Xiong, Ya, Shu, Dong, Zhu, Xihai, Li, Xiangzhong
• Format: Article
• Language: English
• Subjects: Chemistry; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Formic acid; General and physical chemistry; General, apparatus; Liquid phase epitaxy; deposition from liquid phases (melts, solutions, and surface layers on liquids); Materials science; Methods of deposition of films and coatings; film growth and epitaxy; Photocatalysis; Photoelectrocatalysis; Physics; Single-crystal and powder diffraction; Structure of solids and liquids; crystallography; Surface physical chemistry; TiO2; X-ray diffraction and scattering
• ISSN: 0040-6090; 1879-2731
• DOI: 10.1016/j.tsf.2005.04.124

A novel platinised TiO2 film, Pt(TiO2)–TiO2, was prepared by a two-step procedure in which TiO2 as a ‘binding layer’ was first loaded on ITO (indium–tin oxide) conductive glass plates, and then the platinised TiO2 particles in the suspension was dip-coated on the TiO2 film. The resultant hybrid film was characterized by X-ray reflection diffraction, scanning electron microscope, diffuse reflectance spectra and photoelectrochemical measurement. The experimental results showed that the Pt(TiO2)–TiO2/ITO hybrid film not only was much more stable than the single Pt(TiO2)/ITO film but also possessed rather high photocatalytic and photoelectrocatalytic activities compared with the pure TiO2/ITO film. With respect to formic acid solution, the chemical-oxygen-demand removal efficiency of photoelectrocatalytic oxidation for Pt(TiO2)–TiO2/ITO film is apparently higher than that of photocatalytic and photoelectrocatalytic oxidation of TiO2/ITO film, respectively.