Low-temperature conversion of titanate nanotubes into nitrogen-doped TiO2 nanoparticles

B. Buchholcz, H. Haspel, Á Kukovecz, Z. Kónya

Research output: Contribution to journalArticle

15 Citations (Scopus)


Hydrothermally synthesized protonated titanate nanotubes were doped with nitrogen using ammonia gas as the dopant. Thermal decomposition of urea, which served as the ammonia source, offered a low-temperature synthesis route for obtaining a potential visible-light photocatalyst. Nitrogen doping could be achieved at as low as 200 °C. The doped samples were calcined at different temperatures and changes in the morphology and crystalline phase were studied by transmission and scanning electron microscopy, selected area electron diffraction, energy-dispersive X-ray spectroscopy and X-ray diffraction. The nitrogen content and calcination temperature were found to affect the size and shape of the particles as well as their crystalline phase to a great extent. H-form trititanate was shown to transform into rutile TiO2 through the anatase phase in parallel with the collapse of the nanotube morphology and the production of rod-like nanoparticles first and then finally round nitrogen-doped nanoparticles. A phase map was constructed from the data to facilitate the rational design of N-doped trititanate nanotube-based nanostructures. This journal is

Original languageEnglish
Pages (from-to)7486-7492
Number of pages7
Issue number32
Publication statusPublished - Aug 28 2014

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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