ENHANCED DECOLORIZATION OF METHYLENE BLUE IN AQUEOUS SOLUTION OVER COMPOSITE PHOTOSENSITIZED TiO2 CATALYST BY VISIBLE LIGHT

Vladimir F. Georgiev*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The synergistic effect of coupling a squaraine dye (SQ) as a photosensitizer with a composite catalyst containing TiO2 and reduced graphene oxide (TiO2/rGO) has been investigated. A three-component TiO2//rGO/SQ catalyst was synthesized and its ability to improve the decoloration of Methylene Blue (MB) in aqueous solution under irradiation of visible light has been tested. XRD, SEM, TEM and VIS spectroscopy were employed to characterize the samples. Squaraine dye being excited by visible light is capable of transferring electrons to TiO2//rGO material which contributes to increasing the apparent decolorization rate constant up to 0.028 mol/l.s. that is 18 times higher than that of the bare titania.

Original languageEnglish
Pages (from-to)96-103
Number of pages8
JournalJournal of Chemical Technology and Metallurgy
Volume56
Issue number1
Publication statusPublished - 2020
Externally publishedYes

Keywords

  • grapheme
  • photosensitizer
  • phоtосаtаlysis
  • squaraine
  • TiО

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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