The influence of carbonization temperature on the modification of TiO2 in the removal of methyl orange from aqueous solution by adsorption

Shila Jafari*, Bahareh Yahyaei, Ewelina Kusiak-Nejman, Mika Sillanpää

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

4 Citations (Scopus)

Abstract

This work investigated the adsorption ability of unmodified and carbon-modified TiO2 nanoparticles for the removal of methyl orange (MO) from aqueous solution. Carbon–TiO2 was obtained by carbonization of ethanol vapors at three different temperatures (200, 300, and 400°C), and their adsorption was compared with unmodified TiO2 nanoparticles. The Freundlich adsorption model was found to fit for TiO2 and C–TiO2-200, while carbon modification of TiO2 at a high temperature fitted the Langmuir–Freundlich model (C–TiO2-300 and C–TiO2-400). Generally, the carbonization of C–TiO2 increased the adsorption capacity of TiO2 nanoparticles, however the BET surface of modified and pristine TiO2 was almost the same. The zeta potential of modified TiO2 is higher than unmodified TiO2, which leads to efficient adsorption of MO onto modified TiO2.

Original languageEnglish
Pages (from-to)18825-18835
Number of pages11
JournalDESALINATION AND WATER TREATMENT
Volume57
Issue number40
DOIs
Publication statusPublished - 26 Aug 2016
MoE publication typeA1 Journal article-refereed

Keywords

  • Adsorption
  • Carbon modification
  • Dye
  • Methyl orange
  • TiO
  • Zeta potential

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