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<p>Hollow nanostructure featuring highly accessible surface area and short charge transport distance is extremely significant for photo(electro) chemical reaction. Owing to the great promise across a wide range of solar energy utilization technologies, perovskite-type SrTiO<sub>3</sub> warrants rational design and synthesis in hollow architectures. However, the fabrication of uniform hollow SrTiO<sub>3</sub> single crystals with well-defined shell structures remains a challenge. Here, we report the controllable synthesis of single-crystal SrTiO<sub>3</sub> hollow spheres with ultrathin shells, achieved via a simple etching method, and investigate their formation mechanism. The well-crystallized hollow spherical shell exhibits stress effects and optimized electronic band structure, which facilitate photocarrier transport. As a result of these structural and electronic enhancements, the ultrathin spherical shell SrTiO<sub>3</sub> single crystals demonstrate a 2.5-fold increase in activity for photocatalytic water splitting compared to mesoporous SrTiO<sub>3</sub> single crystals. This work demonstrates the advantage of constructing a hollow spherical shell for SrTiO<sub>3</sub> photocatalyst and provides valuable insights into the fabrication of uniform hollow single crystals.</p>

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Single-crystal SrTiO3 hollow sphere with ultrathin shell for efficient photocatalytic water splitting

  • 期刊论文

  • 发表日期：

    2025年5月6日

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  • Yang Zhang,
  • Ji Ping Zhu,
  • Xuefeng Wu,
  • Hao Yang Lin,
  • Peng Chen Ding,
  • Meng Min Wang,
  • Yu Yang Tang,
  • Shuang Yang,
  • Sheng Dai,
  • Peng Fei Liu,
  • Hua Gui Yang

摘要

Hollow nanostructure featuring highly accessible surface area and short charge transport distance is extremely significant for photo(electro) chemical reaction. Owing to the great promise across a wide range of solar energy utilization technologies, perovskite-type SrTiO3 warrants rational design and synthesis in hollow architectures. However, the fabrication of uniform hollow SrTiO3 single crystals with well-defined shell structures remains a challenge. Here, we report the controllable synthesis of single-crystal SrTiO3 hollow spheres with ultrathin shells, achieved via a simple etching method, and investigate their formation mechanism. The well-crystallized hollow spherical shell exhibits stress effects and optimized electronic band structure, which facilitate photocarrier transport. As a result of these structural and electronic enhancements, the ultrathin spherical shell SrTiO3 single crystals demonstrate a 2.5-fold increase in activity for photocatalytic water splitting compared to mesoporous SrTiO3 single crystals. This work demonstrates the advantage of constructing a hollow spherical shell for SrTiO3 photocatalyst and provides valuable insights into the fabrication of uniform hollow single crystals.