Preparation of nitrogen-doped titania with high visible light induced photocatalytic activity by mechanochemical reaction of titania and hexamethylenetetramine

Shu Yin, Hiroshi Yamaki, Masakazu Komatsu, Kibu Chiyo, Jinshu Wang, Qing Tang, Fumio Saito, Tsugio Sato

研究成果: Article査読

215 被引用数 (Scopus)

抄録

Nitrogen-doped yellowish rutile titania was prepared by a mechanochemical method. The samples were prepared by high-energy ball milling of a P-25 titania powder with various amounts of hexamethylenetetramine (HMT) under different milling conditions at around room temperature. The effects of the reaction conditions on the phase composition, particle size, specific surface area, amount of nitrogen-doping, microstructure and photocatalysis of nitrogen monoxide destruction were investigated in detail. The high mechanical energy accelerated the transformation of the phase from anatase to rutile, while the presence of HMT decreased the phase transformation. Residual HMT and by-products could be removed by post-milling calcination in air at 400°C. The nitrogen-doped yellowish titania possessed two absorption edges at around 400 and 550 nm and showed excellent photocatalytic ability for nitrogen monoxide oxidation under visible light irradiation. Irradiation with visible light of wavelength >510 nm allowed nearly 37% nitrogen monoxide to be continuously removed by the nitrogen-doped titania prepared by planetary ball milling of a P-25 titania-10 wt% HMT mixture at 700 rpm for 120 min followed by calcination in air at 400°C.

本文言語English
ページ(範囲)2996-3001
ページ数6
ジャーナルJournal of Materials Chemistry
13
12
DOI
出版ステータスPublished - 2003 12月 1

ASJC Scopus subject areas

  • 化学 (全般)
  • 材料化学

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