Enhanced Visible-Light-Sensitive Two-Step Overall Water-Splitting Based on Band Structure Controls of Titanium Dioxide and Strontium Titanate

• 作者: Hiroshi Irie Satoshi Tanigawa Toshihiro Takashima
• 来源期刊: 材料科学与化学工程(英文)
• 学科: 化学
• 关键词: Titanium Dioxide STRONTIUM TITANATE Visible Light Overall WATER-SPLITTING TWO-STEP Excitation
• 年，卷（期）: clkxyhxgcyw_2017,（1）
• 页码范围: 129-141
• 页数: 13页
• 分类号: O6

摘要

Visible light-induced two-step overall water-splitting was achieved by combining two types of photocatalysts, which were prepared by introducing foreign elements into rutile titanium dioxide (TiO2) and strontium titanate (SrTiO3) with a controlled electronic band structure. Rutile TiO2 and SrTiO3 were doped with chromium and tantalum (Cr,Ta-TiO2) and with rhodium (Rh-SrTiO3), respectively, to introduce visible-light sensitivity. Under irradiation with only visible light from a 420-nm LED lamp, the simultaneous liberation of hydrogen and oxygen with a molar ratio of ~2:1 was achieved with these two types of photocatalysts in the presence of iodate ion/iodide ion as a redox mediator.