Enhanced UV-light driven photocatalytic performance of magnetic CoFe2O4/TiO2 nanohybrid for environmental applications

Samuel Brito Ferreira Santos, Luana Rabelo Hollanda, Yasmin Vieira, Guilherme Luiz Dotto*, Edson Luiz Foletto, Osvaldo Chiavone-Filho

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

In this work, CoFe2O4/TiO2 nanostructure was prepared through a facile and effective solvothermal route for efficient use in the degradation of the Erionyl Red A-3G model pollutant under ultraviolet irradiation. Characterization analysis indicated the successful heterojunction among the precursors. The composite presented band gap value of 2.75 eV, being smaller than that of the pristine TiO2, as well as mesoporous structure. The catalytic activity of nanostructure was investigated by employing a 22 factorial experimental design with 3 central points. The optimized reaction conditions were set as pH = 2 and catalyst dosage = 1.0 g L-1 for an initial pollutant concentration of 20 mg L-1. The prepared nanohybrid presented remarkable catalytic activity, reaching color removal efficiency of 95.39% after 15 min, as well as total organic carbon (TOC) removal of 69.4% after 120 min. The kinetic studies of TOC removal followed the pseudo-first order model, with a rate constant of 0.10 min-1. Moreover, the nanostructure presented magnetic behavior, being easily separated from the aqueous medium through the use of a simple external magnetic field.

Original languageEnglish
Pages (from-to)75078-75088
Number of pages11
JournalEnvironmental Science and Pollution Research
Volume30
Issue number30
Early online date22 May 2023
DOIs
Publication statusPublished - 1 Jun 2023

Keywords

  • CoFeO/TiO
  • erionyl Red
  • experimental design
  • kinetic
  • photocatalysis

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