Formation of bioactive N-doped TiO2 on Ti with visible light-induced antibacterial activity using NaOH, hot water, and subsequent ammonia atmospheric heat treatment

Masakazu Kawashita, Naoko Endo, Tomoaki Watanabe, Toshiki Miyazaki, Maiko Furuya, Kotoe Yokota, Yuki Abiko, Hiroyasu Kanetaka, Nobuhiro Takahashi

研究成果: Article査読

11 被引用数 (Scopus)

抄録

Titanium (Ti) treated with NaOH and hot water, and heated in an ammmonia (NH3) gas atmosphere for 1 or 3 h exhibited in vitro apatite formation within 7 days when soaked in simulated body fluid (SBF). Moreover, the treated Ti decomposed methylene blue and showed excellent bactericidal activity against Escherichia coli under visible light irradiation. The surface treatment resulted in the formation of a fine network of N-doped anatase-type titania (TiO2-xNx) on the Ti surface, which was responsible for both the apatite formation in SBF and the visible light-induced antibacterial activity. These preliminary results highlight the efficacy of our simple method for producing novel bioactive Ti with visible light-induced antibacterial activity, which could be applied to orthopaedic and dental implants without the risk of infection.

本文言語English
ページ(範囲)285-290
ページ数6
ジャーナルColloids and Surfaces B: Biointerfaces
145
DOI
出版ステータスPublished - 2016 9 1

ASJC Scopus subject areas

  • バイオテクノロジー
  • 表面および界面
  • 物理化学および理論化学
  • コロイド化学および表面化学

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