Stability studies of CdS sensitized TiO2 nanotubes prepared using the SILAR method

Vijila Kalarivalappil, Steven J. Hinder, Suresh C. Pillai, V. Kumar, Baiju Kizhakkekilikoodayil Vijayan*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

Titania nanotubes sensitized with CdS nanoparticles of different sizes and amounts were prepared using the successive ionic layer (SILAR) deposition method. UV/visible spectra indicate a red shift in CdS absorption upon increasing the number of SILAR cycles this is due to an increase in amount and size of CdS particles on the surface of titania nanotube. The stability of CdS particle sensitized on the surface of titania nanotubes were monitored using X-ray photoelectron spectroscopy (XPS). The formation of CdSO4 species on the surface of CdS particles was evident from the XPS analysis. Smaller CdS particles, formed using a lower number of SILAR cycles, are more prone to oxidation than the larger particles formed using a greater number of SILAR cycles. The photocatalytic activity and solar cell efficiency is found to be dependent on the number of SILAR cycles employed.

Original languageEnglish
Pages (from-to)1404-1413
Number of pages10
JournalJournal of Environmental Chemical Engineering
Volume6
Issue number1
DOIs
Publication statusPublished - Feb 1 2018

Keywords

  • Cadmium sulphide
  • Photocatalysis
  • Solar cell
  • Titania nanotubes
  • XPS

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Waste Management and Disposal
  • Pollution
  • Process Chemistry and Technology

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