Nanocrystallinity enhancement of TiO2 nanotubes by post-hydrothermal treatment

Akhmad Herman Yuwono, Nofrijon Bin Imam Sofyan, Indriana Kartini, Alfian Ferdiansyah, Tego Hadi Pujianto

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

21 Citations (Scopus)


In the present research, a modified post-hydrothermal treatment with different temperature of 80-150°C has been applied on as-annealed TiO 2 nanotubes derived from conventional hydrothermal process. The treatment has two-fold objectives, i.e. enhancing the nanocrystallinity of anatase TiO2, and at the same time maintaining the integrity of nanotube structures. The resulting TiO2 nanotubes were characterized by using XRD and UV-Vis spectroscopy. The XRD analysis revealed that the as dried TiO2 nanotubes contain combined crystalline structures of sodium-titanate and anatase. It was also found that by increasing the posthydrothermal temperature from 80 to 150°C, the nanocrystallinity of nanotubes enhances as indicated by increasing the crystallite size of anatase TiO2 from 6.93 to 7.81 nm. The anatase crystallite growth affected the optical characteristic of nanotubes, as represented with the reduction of the band gap energy, Eg from 3.75 to 3.67 eV by using Kubelka-Munk analysis for the obtained UV-Vis reflectance spectra. TEM observation confirms that the integrity of nanotubes structure can be well-maintained upon post-hydrothermal treatment.

Original languageEnglish
Title of host publicationAdvanced Materials Research QiR 12
Number of pages10
Publication statusPublished - 2011
Event12th International Conference on Quality in Research, QiR 2011 - Bali, Indonesia
Duration: 4 Jul 20117 Jul 2011

Publication series

NameAdvanced Materials Research
ISSN (Print)1022-6680


Conference12th International Conference on Quality in Research, QiR 2011


  • Amorphous
  • Enhanced nanocrystallinity
  • Post-hydrothermal
  • TiO nanotubes


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