Photocatalytic reduction of CO2 into methanol over CuFe2O4/TiO2 under visible light irradiation

M. Rahim Uddin, Maksudur R. Khan, M. Wasikur Rahman, Abu Yousuf, Chin Kui Cheng

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55 Scopus citations


The present study aims to focus the photocatalytic reduction of carbon dioxide (CO2) into methanol on TiO2 loaded copper ferrite (CuFe2O4) photocatalyst under visible light (500 W xenon lamp) irradiation. In this perspective, CuFe2O4 and CuFe2O4/TiO2 photocatalysts were synthesized following the sol-gel method from copper(II) nitrate, Cu(NO3)2·3H2O (99 %) and iron(III) nitrate, Fe(NO3)3-9H2O (99 %) as precursors. The phases and crystallite size of the photocatalysts were characterized by X-ray diffraction (XRD), morphology by scanning electron microscopy (SEM), absorption spectrum by ultraviolet-visible spectroscopy (UV-Vis), electron-hole (e-/h+) recombination process by photoluminescence spectrophotometer, and elemental compositions by energy dispersive X-ray spectroscopy (EDX) instruments. The loading of TiO2 on CuFe2O4 enhanced the photocatalytic activity in the visible light range. The enhanced photoactivity in CuFe2O4/TiO2 semiconductor catalyst can be attributed to interfacial transfer of photogenerated charges, which led to effective charge separation and inhibited the recombination of photogenerated electron-hole (e-/h+) pairs. Methanol was observed as the main product over CuFe2O4/TiO2 and the photocatalytic activity of CuFe2O4/TiO2 for CO2 reduction was found to be about three times higher (651 μmol/gcat L) than that of CuFe2O4 photocatalyst which might be due to the modification of band gap through TiO2 loading.

Original languageBritish English
Pages (from-to)589-604
Number of pages16
JournalReaction Kinetics, Mechanisms and Catalysis
Issue number2
StatePublished - 30 Jul 2015


  • Band gap energy
  • CO reduction
  • CuFeO/TiO photocatalyst
  • Methanol
  • Visible light irradiation


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