The Korean Journal of Ceramics

The Korean Ceramic Society (한국세라믹학회)
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Preparation of CdS-pillared $H_4Nb_6O_7$ and Photochemical Reduction of Nitrate under Visible Light Irradiation

  • Tawkaew, Sittinun (Institution for Chemical Reaction Science, Tohoku University) ;
  • Fujishiro, Yoshinobu (Institution for Chemical Reaction Science, Tohoku University) ;
  • Uchida, Satoshi (Institution for Chemical Reaction Science, Tohoku University) ;
  • Sato, Tsugio (Institution for Chemical Reaction Science, Tohoku University)
  • Published : 2000.03.01
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Abstract

$H_4Nb_6/O_{17}$/CdS nanocomposites which intercalated CdS particles, less than 0.8nm thickness, in the interlayer of $H_4Nb_6/O_{17}$ were prepared by the successive ion exchange reactions of $H_4Nb_6/O_{17}$ with $Cd^{2+}$ and $C_3H_7NH_3_+$, followed by the reaction with $H_2S$ gas. $H_4Nb_6/O_{17}$/CdS photocatalytically reduced $NO_3$￣ to $NO_2$￣ and $NH_3$in the presence of sacrificial hole acceptor such as methanol under visible light irradiation (wavelength>400nm), although unsupported CdS showed no noticeable photocatalytic activity for $NO_3$￣ reduction. The catalytic activity of $H_4Nb_6/O_{17}$/CdS greatly enhanced with co-doping of Pt particles in the interlayer.

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References

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