Heterostructured Visible-Light-Active Photocatalyst of Chromia-Nanoparticle-Layered Titanate

✍ Scribed by T. W. Kim; S. G. Hur; S.-J. Hwang; H. Park; W. Choi; J.-H. Choy

• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 481 KB
• Volume: 17
• Category: Article
• ISSN: 1616-301X
• DOI: 10.1002/adfm.200600022

✦ Synopsis

Abstract

An efficient visible‐light active photocatalyst of porous CrO~x~–Ti~1.83~O~4~ nanohybrid with a 1:1 type ordered heterostructure is synthesized through a hybridization between a chromia cluster and exfoliated titanate nanosheets. The present nanohybrids are found to have a large surface area (ca. 250–310 m^2^ g^–1^) and an intense absorption of visible light, ascribable, respectively, to the formation of a porous structure and the hybridization of titanate with narrow‐bandgap chromium oxide. After the calcination at 400 °C, the nanohybrid shows an enhanced photocatalytic activity to effectively decompose organic compounds under the irradiation of visible light (λ > 420 nm). The present study highlights the exfoliation–restacking route as a very powerful way to develop efficient visible‐light‐harvesting photocatalysts with excellent thermal stability.