A Novel Sr2CuInO3S p-type semiconductor photocatalyst for hydrogen production under visible light irradiation

• 来源期刊: 能源化学
• 年，卷（期）: 2014,（4）
• 所属期刊栏目: Articles
• 页码范围: 420-426
• 页数: 7页
• 语种: 英文
• DOI: 10.1016/S2095-4956(14)60167-4

摘要

A novel Sr2CuInO3S oxysulfide p-type semiconductor photocatalyst has been prepared by solid state reaction method and it exhibits intriguing visible light absorption properties with a bandgap of 2.3 eV. The p-type semiconductor character of the synthesized Sr2CuInO3S was confirmed by Hall efficient measurement and Mott-Schottky plot analysis. First-principles density functional theory calculations (DFT) and electrochem-ical measurements were performed to elucidate the electronic structure and the energy band locations. It was found that the as-synthesized Sr2CuInO3S photocatalyst has appreciate conduction and valence band positions for hydrogen and oxygen evolution, respectively. Photocat-alytic hydrogen production experiments under a visible light irradiation (λ>420 nm) were carried out by loading different metal and metal-like cocatalysts on Sr2CuInO3S and Rh was found to be the best one among the tested ones.