The effect of boron doping on the physicochemical properties and photocatalytic applications of strontium titanate

作者：Áron Ágoston, Péter Sándor Lehoczky, Lilla Balassa, Ye Li, Ruping Liu, Gergő Ballai, Ákos Szamosvölgyi, Ákos Kukovecz, Zoltán Kónya, Zsolt Pap · 发表于：Ceramics International · 年份：2025 · DOI：10.1016/j.ceramint.2025.02.168 · 被引用次数：5 · 研究领域：Advanced Photocatalysis Techniques、Electronic and Structural Properties of Oxides、Perovskite Materials and Applications

Boron-modified SrTiO 3 nanostructures were obtained by hydrothermal crystallization. The presence of boron induced the formation of a new donor level (resulting in increased recombination time). Hence, the modified samples showed higher photooxidation efficiency for phenol than the pristine SrTiO 3 . Measurable boron doping was detected even with minimal amounts of boron applied at the synthesis step (0.5 at.% boron), which positively affected the photocatalytic activity. As the boron content increases so does the doping degree. In addition, boron compound (SrB 2 O 4 ) appeared on the surface of the nanostructures. The highest photocatalytic activity was achieved by the sample containing 2 at.% boron. The appearance of the new compound on the surface of doped SrTiO 3 reduces the number of photocatalytically active sites, but due to the increase in photocatalytic activity caused by doping, even these samples have higher photocatalytic activity than pristine SrTiO 3 .