Effect of ammonia or nitric acid treatment on surface structure, in vitro apatite formation, and visible-light photocatalytic activity of bioactive titanium metal

Masakazu Kawashita, Naoko Matsui, Toshiki Miyazaki, Hiroyasu Kanetaka

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Ti metal treated with NaOH, NH4OH, and heat and then soaked in simulated body fluid (SBF) showed in vitro apatite formation whereas that treated with NaOH, HNO3, and heat and then soaked in SBF did not. The anatase TiO2 precipitate and/or the fine network structure formed on the surface of the Ti metal treated with NaOH, NH4OH, and heat and then soaked in SBF might be responsible for the formation of apatite on the surface of the metal. The NaOH, NH4OH, and heat treatments might produce nitrogen-doped TiO2 on the surface of the Ti metal, and the concentration of methylene blue (MB) in the Ti metal sample treated with NaOH, NH4OH, and heat decreased more than in the untreated and NaOH- and heat-treated ones. This preliminary result suggests that Ti metal treated with NaOH, NH4OH, and heat has the potential to show photocatalytic activity under visible light.

Original languageEnglish
Pages (from-to)503-508
Number of pages6
JournalColloids and Surfaces B: Biointerfaces
Volume111
DOIs
Publication statusPublished - 2013 Nov 1

Keywords

  • Apatite
  • Nitrogen
  • Simulated body fluid
  • Titania
  • Titanium metal
  • Visible-light photocatalytic activity

ASJC Scopus subject areas

  • Biotechnology
  • Surfaces and Interfaces
  • Physical and Theoretical Chemistry
  • Colloid and Surface Chemistry

Fingerprint Dive into the research topics of 'Effect of ammonia or nitric acid treatment on surface structure, in vitro apatite formation, and visible-light photocatalytic activity of bioactive titanium metal'. Together they form a unique fingerprint.

  • Cite this