Efficient photocatalytic removal of nitric oxide with hydrothermal synthesized Na0.5Bi0.5TiO3nanotubes

Zhihui Ai, Gang Lu, Shuncheng Lee

Research output: Journal article publicationJournal articleAcademic researchpeer-review

25 Citations (Scopus)


In this study, Na0.5Bi0.5TiO3nanotubes were synthesized with a facile hydrothermal method using TiO2P25 (Degussa) and bismuth citrate (BiC5H6O7) as precursors in concentrated NaOH and ammonia alkali solution. The samples were systematically characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). The as-prepared Na0.5Bi0.5TiO3nanotubes exhibited superior activity for photocatalytic removal of gaseous nitric oxide (NO) over TiO2P25 (Degussa) under simulated solar-light irradiation, the NO removal rate can reach as high as ca. 200 ppb·min-1over the Na0.5Bi0.5TiO3nanotubes in a continuous reactor with an initial NO concentration of 400 ppb. The intrinsic hollow-nanotube structure of the Na0.5Bi0.5TiO3photocatalysts contributes to its superior activity under simulated solar light. This work provides a facile route to prepare Na0.5Bi0.5TiO3nanotubes and suggests that the Na0.5Bi0.5TiO3nanotubes are ideal candidates for efficient removal of nitric oxide in indoor/outdoor air.
Original languageEnglish
Pages (from-to)260-266
Number of pages7
JournalJournal of Alloys and Compounds
Publication statusPublished - 15 Nov 2014


  • Hydrothermal method
  • Photocatalysis
  • Solar light

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry


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