Photocatalytic degradation of indigo carmine using Nd-doped TiO2-decorated graphene oxide nanocomposites

Samuel Osei Bonsu Oppong, William W. Anku, Sudheesh K. Shukla, Eric S. Agorku, Poomani P. Govender

Research output: Contribution to journalArticlepeer-review

43 Citations (Scopus)


Abstract: A series of neodymium-doped titanium dioxide (Nd–TiO2) decorated on graphene oxide (GO) were synthesized by sol–gel method. The structures, morphologies and optical properties of the nanocomposites (Nd–TiO2–GO) were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, Raman spectroscopy, Fourier transform infrared spectroscopy and ultraviolet–visible spectroscopy. The photocatalytic study of Nd–TiO2–GO nanocomposites was evaluated via the degradation of indigo carmine under simulated solar light. Results demonstrated that the photodegradation efficiency of indigo carmine solutions irradiated by solar simulated light for 3 h with the nanocomposites used as a catalyst reached a level of 92 % (0.6 % Nd). This high photocatalytic degradation of indigo carmine solutions by the Nd–TiO2–GO nanocomposites is ascribed to the spherical nanocrystalline size of TiO2. Graphical Abstract: [Figure not available: see fulltext.]

Original languageEnglish
Pages (from-to)38-49
Number of pages12
JournalJournal of Sol-Gel Science and Technology
Issue number1
Publication statusPublished - 1 Oct 2016


  • Graphene oxide
  • Indigo carmine, sol–gel
  • Nanomaterials
  • Photodegradation
  • TiO, neodymium

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • General Chemistry
  • Biomaterials
  • Condensed Matter Physics
  • Materials Chemistry


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