Preparation of carbon-doped TiO2 nanopowder synthesized by droplet injection of solution precursor in a DC-RF hybrid plasma flow system

Juyong Jang, Hidemasa Takana, Yasutaka Ando, Oleg P. Solonenko, Hideya Nishiyama

Research output: Contribution to journalReview article

6 Citations (Scopus)

Abstract

Carbon-doped titanium dioxide nanopowder has received much attention because of its higher photocatalytic performance, which is practically activated not only by UV, but also by visible light irradiation. In the present study, C-TiO2 nanopowder was synthesized by droplet injection of solution precursor in a DC-RF hybrid plasma flow system, resulting in higher photocatalytic performance even under visible light irradiation. In-flight C-TiO2 nanoparticles reacted with the high concentration of carbon in plasma flow and were then deposited on the surfaces of two quartz tubes in the upstream and downstream regions of this system. The collected C-TiO2 nanopowder contained anatase-rutile mixed-phase TiO2 and TiC, the contents of which depended on the location of the powder collection, the temperature, and the duration of plasma treatment. Highly functional C-TiO 2 nanopowder collected in the downstream region exhibited a higher degradation rate of methylene blue than that of single-phase anatase TiO 2, even under visible light irradiation, in spite of being TiC.

Original languageEnglish
Pages (from-to)974-982
Number of pages9
JournalJournal of Thermal Spray Technology
Volume22
Issue number6
DOIs
Publication statusPublished - 2013 Aug 1

Keywords

  • DC-RF hybrid plasma
  • carbon-doped TiO
  • droplet injection
  • flow control
  • nanopowder
  • solution precursor

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Materials Chemistry

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