Photocatalysis by illuminated titania:: Oxidation of hydroquinone and p-benzoquinone

被引：0

作者：

Sobczynski, A ^{[1
]}

Duczmal, L ^{[1
]}

Dobosz, A ^{[1
]}

机构：

[1] Poznan Univ Econ, Fac Commod Sci, PL-60067 Poznan, Poland

来源：

MONATSHEFTE FUR CHEMIE | 1999年 / 130卷 / 03期

关键词：

photodegradation; hydroquinone; p-benzoquinone; intermediates; kinetics;

D O I：

暂无

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Photocatalytic oxidation of hydroquinone and p-benzoquinone, the main intermediates which are formed in the process of phenol oxidation on irradiated titania, was studied. The reaction proceeds via several steps. Some of the intermediates were detected by HPLC and GC-MS; ethanedial, glycerol, and 1,2,4-trihydroxybenzene. Under illumination in the presence of TiO(2), p-benzoquinone initially transforms partly to hydroquinone, partly oxidizes to unidentified intermediates. The residue, about 4% of the concentration of hydroquinone, undergoes slow oxidation together with the hydroquinone. The rate of hydroquinone photooxidation shows 1(st) order behaviour.

引用

页码：377 / 384

页数：8

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