Photocatalytic degradation of dyes by CdS microspheres under near UV and blue LED radiation

Eveliina Repo*, Selvaraj Rengaraj, Susanna Pulkka, Emmanuelle Castangnoli, Sami Suihkonen, Markku Sopanen, Mika Sillanpää

*Corresponding author for this work

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

Nanostructured CdS microspheres were prepared by hydrothermal synthesis and used as photocatalyst in the degradation of dyes under near UV and blue LED radiation. Nearly complete degradation of methylene blue, phenol red and methyl red was achieved in 3 h. Catalytic performance of the microspheres remained unchanged during five recycling steps. Different modification methods were tested to prevent photocorrosion of the CdS particles. Using glucose as protecting agent gave the most promising results. Furthermore, photocatalysis under LED radiation tested in this study showed quite good energy efficiency, which makes this method economically appealing.

Original languageEnglish
Pages (from-to)206-214
Number of pages9
JournalSeparation and Purification Technology
Volume120
DOIs
Publication statusPublished - 2013

Keywords

  • Cadmium sulfide
  • Dye
  • LED
  • Photocatalysis
  • Water treatment

ASJC Scopus subject areas

  • Analytical Chemistry
  • Filtration and Separation

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