Uniformly dispersed CdS/CdSe quantum dots co-sensitized TiO2 nanotube arrays with high photocatalytic property under visible light

Lingjuan Liu, Jianing Hui, Lili Su, Jun Lv, Yucheng Wu*, John T. S. Irvine

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

Highly detached TiO2 nanotube arrays (TiO2-NTAs) were fabricated by anodization method using electrolyte with high water content. CdS and CdSe quantum dots (QDs) were co-deposited on the TiO2-NTAs. The results showed that the CdS and CdSe QDs were uniformly deposited on both the outer wall and inner tube of TiO2-NTAs. The photocatalytic performance of the as-prepared (CdS-CdSe)/TiO2-NTAs was tested by degradation of methyl orange with 0.2 M Na2S and Na2SO3 as sacrificial reagents under visible light (lambda > 400 nm). It was found that the photodegradation rate reached as high as 95.1% in 2 h. Also, a reasonable degradation rate of 87.5% was achieved after 3 cycles, suggesting a good stability of the as-prepared (CdS-CdSe)/TiO2-NTAs. (C) 2014 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)231-235
Number of pages5
JournalMaterials Letters
Volume132
Early online date20 Jun 2014
DOIs
Publication statusPublished - 1 Oct 2014

Keywords

  • TiO2 nanotube arrays
  • CdS-CdSe quantum dots
  • Semiconductors
  • Nanocomposites
  • Visible-light activity
  • Degradation
  • Electrode
  • Cells

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