Synthesis of Co2+-doped Fe2O3 photocatalyst for degradation of pararosaniline dye

R. Suresh, K. Giribabu, R. Manigandan, R. V. Mangalaraja, Jorge Yanez Solorza, A. Stephen, V. Narayanan

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

In this paper, x (=2, 5, 7 and 10mol%) Co2+-doped Fe2O3 (xCo:Fe2O3) nanoparticles with enhanced photocatalytic activity have been reported. xCo:Fe2O3 nanoparticles were successfully prepared by co-precipitation followed thermal decomposition method. The structural, optical and morphological properties of the prepared samples were studied by X-ray diffraction (XRD), Fourier transform infrared (FT-IR), X-ray photoelectron spectroscopy (XPS), diffuse reflectance (DR) UV–visible absorption spectroscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The obtained results revealed that Co2+ ions were well doped within the lattices of Fe2O3. Also, Co2+ ions suppress the formation of the most stable α- Fe2O3 and stabilize less stable γ-Fe2O3 at 450 °C. The photocatalytic activity of xCo:Fe2O3 was examined by using pararosaniline (PR) dye. It was found that photocatalytic degradation of PR depends on dopant concentration (Co2+ ions). Relatively, the highest photocatalytic activity was observed for 5%Co:Fe2O3 nanoparticles. The plausible photocatalytic degradation pathway of PR at xCo:Fe2O3 surface has also been proposed.

Original languageEnglish
Pages (from-to)39-46
Number of pages8
JournalSolid State Sciences
Volume68
DOIs
StatePublished - 1 Jun 2017
Externally publishedYes

Keywords

  • Co-doped FeO
  • Nanoparticles
  • Pararosaniline
  • Photocatalyst

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