Synthesis of Pt Doped Bi2O3/RuO2 Photocatalysts for Hydrogen Production from Water Splitting Using Visible Light
Abstract:This study was focused on the preparation of modified bismuth oxide photocatalysts, including Ru and Pt doped Bi2O3/RuO2, using sonochemically assisted method to enhance their photocatalytic activity. The crystalline phase composition and surface structure of Bi2O3/RuO2 photocatalysts were examined using SEM, XRD, UV-visible spectroscopy, and XPS. Optical characterizations have indicated that the Bi2O3/RuO2 presents the photoabsorption properties shifting from UV light region into visible light which is approaching towards the edge of 470 nm. According to the experimental results, visible-light-driven photocatalysis for water splitting with the addition of 0.3 M Na2SO3 and 0.03 M H2C2O4 as sacrificing agents demonstrates that Pt/Bi2O3/RuO2-RuO2 catalyst could increase the amount of hydrogen evolution, which is around 11.6 and 14.5 μmol g-1 h-1, respectively. Plausible formation mechanisms of modified bismuth oxide and reaction mechanisms of photocatalytic water splitting have been proposed.
Document Type: Research Article
Publication date: July 1, 2012
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