Fabrication of TiO2 nano-branched arrays/Cu2S composite structure and its photoelectric performance

Keying Guo, Zhifeng Liu*, Cailou Zhou, Jianhua Han, Yufeng Zhao, Zhichao Liu*, Yajun Li, Ting Cui, Bo Wang, Jing Zhang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

49 Scopus citations

Abstract

Hierarchical nanostructured TiO2 is known to be ideal materials for photoelectrochemical water splitting because of its excellent light harvesting efficiency, efficient charge separation and transport properties. In the present work, rutile TiO2 nano-branched arrays (NBs) were grown directly on transparent conductive glass (FTO) using a simple two-step hydrothermal method. TiO2 NBs/Cu2S composite structure was subsequently synthesized through successive ionic layer adsorption and reaction (SILAR). Detailed growth mechanisms for TiO2 NBs nanostructure and TiO2 NBs/Cu2S composite structure were discussed. The optical property of composite structures was characterized, and enhanced absorption spectrum was discovered. A much higher hydrogen generation efficiency of 13.15% at 0.70V versus Ag/AgCl electrode was achieved for this TiO2 NBs/Cu2S composite structure. This is attributed to the improved light absorption and appropriate energy gap structure, which is over 40% higher than that of TiO2 NWs/Cu2S composite structure.

Original languageEnglish
Pages (from-to)27-35
Number of pages9
JournalApplied Catalysis B: Environmental
Volume154-155
DOIs
StatePublished - Jul 2014
Externally publishedYes

Keywords

  • Branched arrays
  • Composite structure
  • CuS
  • TiO
  • Water splitting

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