CoFe2O4/TiO2 nanocatalysts for the photocatalytic degradation of Reactive Red 120 in aqueous solutions in the presence and absence of electron acceptors

Panneerselvam Sathishkumar, Ramalinga Viswanathan Mangalaraja, Sambandam Anandan, Muthupandian Ashokkumar

Research output: Contribution to journalArticlepeer-review

124 Scopus citations

Abstract

Magnetic CoFe2O4 and CoFe2O4/TiO2 nanocatalysts were prepared by a co-precipitation method in which CoFe2O4 induced the formation of thermodynamically more stable rutile phase of TiO2. The structural and elemental analyses confirmed the formation of CoFe2O4 and CoFe2O4/TiO2 nanocatalysts and the specific atomic ratios of Ti, Co, Fe, and O in these catalysts. The presence of Co2+ and Fe3+ cations in its oxide forms on the surface of TiO2 led to visible light absorption in the wavelength range 550-650nm. The band gap calculated by Tauc approach showed ∼3.2, 1.1 and 2.8eV for TiO2, CoFe2O4 and CoFe2O4/TiO2 nanocatalysts, respectively. The photocatalytic degradation of Reactive Red 120 (RR120) was studied by varying its concentration and the amount of nanocatalyst in order to attain a maximum degradation. The role of electron acceptors in the photocatalytic degradation of RR120 was studied in the presence of the magnetic nanocatalysts.

Original languageEnglish
Pages (from-to)302-310
Number of pages9
JournalChemical Engineering Journal
Volume220
DOIs
StatePublished - 15 Mar 2013
Externally publishedYes

Keywords

  • CoFeO/TiO nanocatalyst
  • Electron acceptors
  • Photocatalytic degradation
  • Reactive Red 120

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