Black strontium titanate nanocrystals of enhanced solar absorption for photocatalysis

Wenli Zhao, Wei Zhao, Guilian Zhu, Tianquan Lin, Fangfang Xu*, Fuqiang Huang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

41 Scopus citations


Black titania has attracted enormous attention due to its enhanced photocatalytic activity via increased solar absorption, but few studies extended the investigations to other wide band-gap titanates. Herein, strontium titanate (SrTiO3), a typical ternary titanate with more potential in photocatalysis, is selected as the target material. Black SrTiO3 nanocrystals were obtained by molten aluminum reduction of solution-processed pristine SrTiO3 in a two-zone furnace. Different from the black titania, black SrTiO3 nanocrystals are well-crystallized and have no core-shell structure. Substantial Ti3+ cations and oxygen vacancies are introduced into SrTiO3 after aluminum reduction, which results in enhanced absorption in both visible and near-infrared regions, and improved charge separation and transport. The photocatalytic hydrogen-generation and photoelectrochemical investigations demonstrate that black SrTiO3 exhibits an impressive improvement (2.5 times and 2.4 times at 1.23 VRHE, respectively) compared with white SrTiO3.

Original languageEnglish (US)
Pages (from-to)7528-7534
Number of pages7
Issue number39
StatePublished - Aug 21 2015

Bibliographical note

Publisher Copyright:
© 2015 The Royal Society of Chemistry.

ASJC Scopus subject areas

  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics


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