Article ID

95BEH32008
------------------------------------------------------------------------


Title

Titanium(IV) Oxide Photocatalyst of Ultra-High Activity for Selective N-Cyclization of Amino Acid in Aqueous Suspension
------------------------------------------------------------------------


Author(s)

Bunsho Ohtani
Kunihiro Iwai
Hiroshi Kominami (Kinki University)
Takeshi Matsuura (Kinki University)
Yoshiya Kera (Kinki University)
Sei-ichi Nishimoto

------------------------------------------------------------------------


Publication/Publisher

Chem. Phys. Lett., Vol. 242, pp. 315-319, 1995.

------------------------------------------------------------------------


Abstract

Titanium(IV) oxide (TiO2) powder was prepared by high-temperature hydrolysis of titanium(IV) tetrabutoxide in toluene as anatase crystallites of average diameter of ca. 15 nm. They were platinized by impregnation from aqueous chloroplatinic acid solution followed by hydrogen reduction. The catalyst was suspended in an aqueous L-lysine (Lys) solution and photoirradiated under argon at ambient temperature to obtain L-pipecolinic acid (PCA). Among several platinized commercial TiO2 powders, the present TiO2 showed the highest photocatalytic activity for both Lys consumption and PCA production. This result is attributed to both the higher activity owing to the larger surface area with lesser defects and the higher dispersion of platinum deposits acting as an efficient reduction site for a Schiff base intermediate into PCA.

------------------------------------------------------------------------
To the author(s):
Please check if your data is correctly handled.
------------------------------------------------------------------------
Concerning to this article/book,
please contact
ohtani@scl.kyoto-u.ac.jp