A Novel Method for Preparing Ordered SnO2/TiO2 Alternate Nanoparticulate Films

✍ Scribed by Lixin Cao; Haibao Wan; Lihua Huo; Shiquan Xi

• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 123 KB
• Volume: 244
• Category: Article
• ISSN: 0021-9797
• DOI: 10.1006/jcis.2001.7880

✦ Synopsis

A novel method using LB films as precursors to prepare pure inorganic ordered film with periodic structure was developed. Surfactant-stabilized SnO 2 nanoparticulate organosols and TiO 2 nanoparticulate organosols were prepared and used as spreading solutions. Using LB technique, the good film-forming ability of the surfactant-stabilized SnO 2 nanoparticles and TiO 2 nanoparticles was confirmed by the determination of the π-A isotherms. The surfactant-stabilized SnO 2 and TiO 2 nanoparticulate monolayers were fabricated on the water surface and then were transferred to solid substrates (CaF 2 , quartz, silicon, and so on) alternately, layer-by-layer. Then the as-deposited alternate LB film was treated at different temperatures. The as-deposited alternate LB film and the treated film were characterized by Fourier transform infrared spectroscopy, UV-visible spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The results indicate that our method was successful. The as-deposited alternate LB film formed a periodic structure with a long spacing of 6.5 nm that was composed of SnO 2 nanoparticles, TiO 2 nanoparticles, and arachidic acid. The treated film composed of SnO 2 nanoparticles and TiO 2 nanoparticles formed a pure inorganic periodic structure with an ordered distance of 5.4 nm.