Preparation and properties of titania-Cs2.5H0.5PW12O40 hybrid films

✍ Scribed by Akira Nakajima; Shunsuke Matsui; Sayaka Yanagida; Yoshikazu Kameshima; Kiyoshi Okada

• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 880 KB
• Volume: 203
• Category: Article
• ISSN: 0257-8972
• DOI: 10.1016/j.surfcoat.2008.10.010

✦ Synopsis

Phase separation 1,4-dioxane

Using continuous coating with Si-alkoxide as a binder, Cs 2.5 H 0.5 PW 12 O 40 (Cs2.5) powder was prepared and immobilized onto a Pyrex glass plate. The Cs2.5 coating possessed an acid site on the film surface. Translucent TiO 2 -Cs2.5 hybrid films were prepared by laminating TiO 2 films with holes on the Cs2.5 coating using phase-separation of alkoxide. Photocatalytic decomposition of 1,4-dioxane in water revealed that the holes serve as adsorption fields for ethylene glycol diformate, an intermediate with poor affinity to TiO 2 . The TiO 2 -Cs2.5 hybrid films produced by this process are candidates for purification of water containing several chemicals with a slow decomposition rate in photocatalysis.