Journal of Photoscience

한국광과학회 (Korean Society of Photoscience)
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PHOTOCATALYTIC ACTIVITY OF ARTIFICIAL TITANIUM(IV) OXIDE-$TIO_2(B)$-AND TITANATES SUSPENDED IN AQUEOUS SOLUTION OF ALIPHATIC ALCOHOLS

  • Bunsho Ohtani (Division of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University) ;
  • Koujiro Tennou (Division of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University) ;
  • Nishmoto, Sei-ichi (Division of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University) ;
  • Tomoyuki Inui (Division of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University)
  • 발행 : 1995.03.01
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초록

Powders of artificial crystallites of titanium(IV) oxide, TiO$_2$(B), were synthesized by the calcination of tetratitanic acid (hydrate, $H_2Ti_4O_9H_2O$; TTA). The relating titanates, potassium octatitanate ($K_2Ti_8O_{17}$) and octatitanic acid($H_2Ti_8O_{17}$), were also prepared. These powders, loaded with small amount of Pt, were suspended in an aqueous solution of 2-propanol and irradiated under argon atmosphere at 298 K + 0.5 deg. All the photocatalysts tested in this study produced almost equimolar amount of acetone and molecular hydrogen (H$_2$). Among them TiO$_2$(B) and TYA showed the higher photocatalytic activity but rather lower than commercial titanium(IV) oxide (TiO$_2$) powders. The photocatalytic activity of TiO$_2$(B) for 2-propanol dehydrogenation in deaerated aqueous suspension increased with the elevating calcination temperature. Comparison of rate of H$_2$ formation from methanol and 2-propanol solutions by the TiO$_2$(B) photocatalyst suggested a possibility of selection of substrate with its molecular size by TiO$_2$(B)

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