Topotactic Epitaxy of SrTiO3 Mesocrystal Superstructures with Anisotropic Construction for Efficient Overall Water Splitting

• Zhang, Peng

• Ochi, Tomoya

• Fujitsuka, Mamoru

• Kobori, Yasuhiro

• Majima, Tetsuro

• Tachikawa, Takashi

Bibliographic Information

Other Title

• Topotactic Epitaxy of SrTiO₃ Mesocrystal Superstructures with Anisotropic Construction for Efficient Overall Water Splitting

Abstract

The higher-order structures of semiconductor-based photocatalysts play crucial roles in their physicochemical properties for efficient light-to-energy conversion. A novel perovskite SrTiO3 mesocrystal superstructure with well-defined orientation of assembled cubic nanocrystals was synthesized by topotactic epitaxy from TiO2 mesocrystals through a facile hydrothermal treatment. The SrTiO3 mesocrystal exhibits three times the efficiency for the hydrogen evolution of conventional disordered systems in alkaline aqueous solution. It also exhibits a high quantum yield of 6.7 % at 360 nm in overall water splitting and even good durability up to 1 day. Temporal and spatial spectroscopic observations revealed that the synergy of the efficient electron flow along the internal nanocube network and efficient collection at the larger external cubes produces remarkably long-lived charges for enhanced photocatalysis.

Journal

• Angewandte Chemie International Edition

  Angewandte Chemie International Edition 56 (19), 5299-5303, 2017-05-02

  Wiley-VCH Verlag

Keywords

• interfacial charge transfer
• mesocrystals
• photocatalysis
• superstructure
• water splitting

Details

• CRID: 1050575520347144832
• NII Article ID: 120006406709
• DOI: 10.1002/anie.201702223
• ISSN: 15213773
• ISSN: 14337851
• HANDLE: 20.500.14094/90004654
• Web Site: https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fanie.201702223
• Web Site: https://onlinelibrary.wiley.com/doi/pdf/10.1002/anie.201702223
• Text Lang: en
• Article Type: journal article
• Data Source:
  • IRDB
  • Crossref
  • CiNii Articles
  • KAKEN