A new CdS/Bi1-xInxTaO4 heterostructured photocatalyst containing solid solutions for H2 evolution from water splitting

Jian Yu, Si Liang Lei, Tong Cai Chen, Jian Lan, Jian Ping Zou*, Lin Hua Xin, Sheng Lian Luo, Chak Tong AU

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

A new strategy has been put forward to improve the performance of photocatalytic H2 evolution of tantalate-based catalysts through designing solid solutions Bi1-xInxTaO4 combined with CdS, among which the solid solutions Bi1-xIn xTaO4 (x = 0, 0.1, 0.3, 0.5, 0.7, 0.9, and 1.0) were firstly synthesized by the citrate method using cheap and environment-friendly Ta2O5. The experimental results reveal that the Bi 0.5In0.5TaO4 solid solution shows the best photocatalytic performance among the Bi1-xInxTaO 4 solid solutions. And in the absence of noble metals, the 30% CdS/Bi0.5In0.5TaO4 (30CBITO) catalyst exhibits good photocatalytic hydrogen evolution from water splitting with a rate of H2 production of 511.75 μmol h-1 g-1 under simulated sunlight irradiation. And the rate of hydrogen evolution does not markedly change for 60 h. Their compositions, structures and morphologies were characterized by UV-vis diffusion reflectance spectroscopy (DRS), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and high resolution transmission electron microscopy (HRTEM). A photocatalytic enhancement mechanism was put forward to elucidate the superior photocatalytic activity and long-term stability of the heterostructured CdS/Bi0.5In0.5TaO 4 composites.

Original languageEnglish
Pages (from-to)13105-13113
Number of pages9
JournalInternational Journal of Hydrogen Energy
Volume39
Issue number25
DOIs
Publication statusPublished - 22 Aug 2014

Scopus Subject Areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

User-Defined Keywords

  • Cocatalysts
  • Hydrogen evolution
  • Photocatalysts
  • Solid solutions
  • Water splitting

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