High-performance heterostructured CdS/Ba1-xSrxTiO3 system with unique synergism for photocatalytic H2 evolution

Si Liang Lei, Jian Yu, Shao Kui Bao, Gui Sheng Zeng*, Hui Long Liu, Dan Dan Wu, Xing Hua Tang, Jian Ping Zou, Chak Tong AU

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

This study demonstrates the design and synthesis of heterostructured CdS/Ba1-xSrxTiO3 composites that exhibit outstanding photocatalytic activity and long-term durability for H2 evolution from an aqueous solution containing the sacrificial agent (Na2S/Na2SO3) without loading any noble metals as cocatalysts or reagents for regeneration. The excellent performance of this heterostructured catalyst is due to the unique synergetic effect between CdS and Ba1-xSrxTiO3. In this system, CdS not only functions as a high-activity photocatalyst absorbing light to generate electrons but also acts as a cocatalyst accepting the photogenerated electrons from Ba1-xSrxTiO3 for H2 evolution, while Ba1-xSrxTiO3 serves as captors of photoholes of CdS. In this way, the heterostructured composites can efficiently block the recombination of photogenerated electrons and holes, leading to a significant improved harvest of photogenerated electrons for H2 evolution. In the meantime, the photocorrosion of CdS can be greatly alleviated due to fast moving photogenerated holes of CdS, contributing a long-term stability of the designed heterostructured system.

Original languageEnglish
Pages (from-to)58-67
Number of pages10
JournalApplied Catalysis A: General
Volume493
DOIs
Publication statusPublished - 5 Mar 2015

Scopus Subject Areas

  • Catalysis
  • Process Chemistry and Technology

User-Defined Keywords

  • CdS
  • H evolution
  • Heterostructure
  • Photocatalysis
  • Titanate

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