Photocatalytic activities of AgSbO3 under visible light irradiation

✍ Scribed by Tetsuya Kako; Naoki Kikugawa; Jinhua Ye

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 681 KB
• Volume: 131
• Category: Article
• ISSN: 0920-5861
• DOI: 10.1016/j.cattod.2007.10.094

✦ Synopsis

A novel visible light sensitive photocatalyst, AgSbO 3 was prepared by a conventional solid-state reaction method. This oxide belonging to a cubic-pyrochlore structure can absorb visible light with wavelength up to about 480 nm. From the band structure calculation, we found that the top of the valence band consists of the hybridized Ag 4d and O 2p orbitals and the bottom of the conduction band mainly consists of the Ag 5s and the Sb 5s orbitals. Photocatalytic activities were evaluated using O 2 evolution from an aqueous silver nitrate solution and decomposition of gaseous 2propanol under visible light irradiation. We found that AgSbO 3 shows a higher O 2 evolution activity than WO 3 and 2-propanol can be mineralized by the AgSbO 3 photocatalysis under visible light irradiation.