Synthesis of excellent visible-light responsive TiO2 - XNy photocatalyst by a homogeneous precipitation- solvothermal process

Shu Yin, Yohei Aita, Masakazu Komatsu, Jinshu Wang, Qing Tang, Tsugio Sato

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179 Citations (Scopus)

Abstract

Anatase, brookite and rutile type nitrogen-doped titania nanocrystals (TiO2 - xNy) which are beige in color were successfully prepared by a 'Homogeneous Precipitation-Solvothermal Process' (HPSP) in TiCl3-hexamethylenetetramine (C6H 12N4) aqueous and alcohol solutions. The phase composition, crystallinity, microstructure, specific surface area, nitrogen doping amount and photocatalytic activity of titania powders greatly changed depending on pH, temperature and the type of treatment alcohols. The TiO 2 - xNy powders showed excellent visible-light absorption and photocatalytic activity for nitrogen monoxide destruction under irradiation by both visible-light and UV-light. The beige titania powders prepared in TiCl3-hexamethylenetetramine alcohol solutions at 190 °C for 2 h possessed higher specific surface areas than those in aqueous solution. About 39 and 83% nitrogen monoxide could be continuously removed by the anatase TiO2 - xNy photocatalyst under irradiation of visible-light (λ > 510 nm) and UV-light (λ > 290 nm), respectively.

Original languageEnglish
Pages (from-to)674-682
Number of pages9
JournalJournal of Materials Chemistry
Volume15
Issue number6
DOIs
Publication statusPublished - 2005 Feb 14

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Chemistry

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