Improvement of thermal stability of nitrogen doped titania photocatalyst by addition of surfactants during solvothermal treatment

Shu Yin, Masakazu Komatsu, Bin Liu, Ruixing Li, Yuhua Wang, Tsugio Sato

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

The TiO2-x N y nanocrystals with beige color were prepared by homogeneous precipitation-solvothermal process in TiCl 3-hexamethyleneamine-alcohol solutions with the addition of various surfactants, such as sodium dodecylbenzenesulfonate (SDBS), n-hexadecylamine (HAD), and n-hexadecyltrimethylammonium chloride (HTAC) at 190 °C for 10 h. The phase composition, crystallinity, microstructure, specific surface area, nitrogen doped amount, and photocatalytic activity of titania powders greatly changed depending on pH value and other reaction conditions. The TiO 2-x N y powders prepared by solvothermal treatment with surfactant additives followed by calcination in air at 400 °C showed smaller particle size, larger BET specific surface area and higher photocatalytic activity than those without surfactant. The TiO2-x N y powders showed excellent visible-light absorption, thermal stability and photocatalytic activity for nitrogen monoxide destruction under irradiation of both visible-light and UV-light irradiation. About 40% and 60% nitrogen monoxide could be continuously removed with the residence time of 1.9 min by the TiO2-x N y photocatalyst under irradiation of visible-light (λ > 510 nm) and UV-light (λ > 290 nm), respectively.

Original languageEnglish
Pages (from-to)2240-2246
Number of pages7
JournalJournal of Materials Science
Volume43
Issue number7
DOIs
Publication statusPublished - 2008 Apr

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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