Carbon-based TiO2-x heterostructure nanocomposites for enhanced photocatalytic degradation of dye molecules

Jagadeesh Babu Sriramoju, Murthy Muniyappa, Navya Rani Marilingaiah, Chetana Sabbanahalli, Manjunath Shetty, Ravi Mudike, Chitrabanu C.P, Prasanna D. Shivaramu, Nagaraju G, Kanchugarakoppal S. Rangappa, Ananda Kumar Ananda, Dinesh Rangappa

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)


Application of brown titanium dioxide (TiO2-x) and its modified composite forms in the photocatalytic decomposition of organic pollutants in the environment is a promising way to provide solutions for environmental redemption. Herein, we report the synthesis of effective and stable TiO2-x nanoparticles with g-C3N4, RGO, and multiwalled carbon nanotubes (CNTs) using a simple hydrothermal method. Among all the as-synthesized samples, excellent photocatalytic degradation activity was observed for RGO-TiO2-x nanocomposite with high rate constants of 0.075 min−1, 0.083 min−1 and 0.093 min−1 for methylene blue, rhodamine-B, and rosebengal dyes under UV–Visible light irradiation, respectively. The altered bandgap (1.8 eV) and the large surface area of RGO-TiO2-x nanocomposite impacts on both absorption of visible light and efficiency of photogenerated charge electron (e)/hole (h+) pair separation. This resulted in enhanced photocatalytic property of carbon-based TiO2-x nanocomposites. A systematic study on the influence of different carbon nanostructures on the photocatalytic activity of brown TiO2-x is carried out.

Original languageEnglish
Pages (from-to)10314-10321
Number of pages8
JournalCeramics International
Issue number7
Publication statusPublished - 01-04-2021

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry


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