Photoreduction of NO3 - and NO2 - under visible light irradiation with layered H4Nb6O17/CdS and H2Ti4O9/CdS nanocomposites

Sittinun Tawkaew, Satoshi Uchida, Yoshinobu Fujishiro, Tsugio Sato

Research output: Contribution to journalConference articlepeer-review

4 Citations (Scopus)


The photoreduction of NO3 - and NO2 - was performed at 60 °C under irradiation of visible light (λ >400 nm) in the presence of unsupported CdS, H2Ti4O9/CdS and H4Nb6O17/CdS in 10 vol.% aqueous methanol solution. The photoreduction rate of NO3 - proceeded in the presence of H4Nb6O17/CdS and H2Ti4O9/CdS nanocomposites although unsupported CdS, H4Nb6O17 and H2Ti4O9 did not show photocatalytic activity for nitrate reduction under visible light irradiation. The photoreduction rate of NO3 - and NO2 - changed significantly depending on solution pH, i.e., with increasing solution pH the reduction rate of NO3 - increased, on the orther hand, that of NO2 - decreased.

Original languageEnglish
Pages (from-to)237-242
Number of pages6
JournalMolecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
Publication statusPublished - 2000 Jan 1
Event10th International Symposium on Intercalation Compounds (ISIC 10) - Okasaki, Japan
Duration: 1999 May 301999 Jun 3


  • Cadmium sulphide
  • HNbO/CdS
  • HTiO/CdS
  • Nitrate
  • Nitrite
  • Photoreduction

ASJC Scopus subject areas

  • Condensed Matter Physics

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