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Meeting MS&T25: Materials Science & Technology
Symposium Energy Materials for Sustainable Development
Presentation Title The Photocatalytic Properties of Sr-excess SrTiO3
Author(s) Sipei Li, Paul A. Salvador, Gregory S. Rohrer
On-Site Speaker (Planned) Sipei Li
Abstract Scope SrTiO3 is a well-known photocatalyst capable of splitting water. There is evidence that the catalytic efficiency is sensitive to the composition, particularly for Sr-rich samples. The accommodation of excess Sr by point defects is limited. Instead, Sr-rich, planar Ruddlesden–Popper stacking faults appear and ultimately Sr2TiO4 appears as a second phase. In this work, we report the changes in both the microstructure and photocatalytic activity of planar ceramic SrTiO3 samples as a function of the Sr content. The results are discussed in the context of the planar defects and phase boundaries in these ceramics.

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