Mechanistic aspects of oxalic acid oxidation by photocatalysis and ozonation

被引：10

作者：

Marci, G. ^{[1
]}

Garia-Lopez, E. ^{[1
]}

Palmisano, L. ^{[1
]}

机构：

[1] Univ Palermo, Dipartimento Ingn Chim Proc & Mat, Schiavello Grillone Photocatalysis Grp, I-90128 Palermo, Italy

来源：

JOURNAL OF APPLIED ELECTROCHEMISTRY | 2008年 / 38卷 / 07期

关键词：

oxalic acid degradation; ozonation; photocatalysis; titanium dioxide;

D O I：

10.1007/s10800-008-9532-4

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Oxalic acid has been oxidised in acidic aqueous solutions (pH 3) using photocatalysis and ozonation alone or coupled. The simultaneous presence of ozone, titanium dioxide and near UV irradiation increases the oxidation rate of oxalic acid to values greater than those deriving from the single contributions of photocatalysis and ozonation. In particular in the present paper ozonation alone, heterogeneous photocatalysis and also combined ozonation with heterogeneous photocatalysis have been used for the oxidation of oxalic acid at acidic pH in the presence of TiO2 Degussa P25. A likely mechanism, able to explain both the homogeneous and heterogeneous processes, is discussed.

引用

页码：1029 / 1033

页数：5

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