Synthesis of a Gold-Inserted Iron Disilicide and Rutile Titanium Dioxide Heterojunction Photocatalyst via the Vapor-Liquid-Solid Method and Its Water-Splitting Reaction.

ABSTRACT: A solid-state Z-scheme system is constructed whereby rutile titania (TiO₂) and beta-iron disilicide (β-FeSi₂) were combined to act as oxygen (O₂)- and hydrogen (H₂)-evolution photocatalysts, respectively, connected by gold (Au). β-FeSi₂ island grains with diameters in the 0.5-2 μm range were formed on the surface of Au-coated TiO₂ powder by the co-sputtering method. On the surface of TiO₂ powder, the Au-Si liquidus phase was obtained via a Au-Si eutectic reaction, which contributed to the selective deposition and crystallization of β-FeSi₂ island grains onto Au. After the loading of the H₂-evolution cocatalysts platinum and chromium oxide onto β-FeSi₂, the system obtained catalyzed

SUBMITTER: Akiyama K 

PROVIDER: S-EPMC9631897 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature