Defect Engineering of Photocatalysts by Doping of Aliovalent Metal Cations for Efficient Water Splitting

作者：Tsuyoshi Takata, Kazunari Domen · 发表于：The Journal of Physical Chemistry C · 年份：2009 · DOI：10.1021/jp908621e · 被引用次数：335 · 研究领域：Advanced Photocatalysis Techniques、Electronic and Structural Properties of Oxides、Semiconductor materials and devices

Doping of aliovalent metal cations to SrTiO 3, a photocatalyst for overall water splitting, was variously examined for the control of defect structure as well as the photocatalysis. Doping of a cation with valence lower than that of the parent cation effectively enhanced photocatalytic activity, while the doping of a higher valence cation led to the suppressed photocatalysis. It was demonstrated that the doping of a lower valence cation to intentionally introduce oxygen vacancies and decrease Ti 3+ is effective to enhance photocatalytic activity.