Study on photocatalytic oxidation for determination of the low chemical oxygen demand using a nano-TiO2-Ce(SO4)2 coexisted system

被引：25

作者：

Chai, YH ^{[1
]}

Ding, HC ^{[1
]}

Zhang, ZH ^{[1
]}

Xian, YZ ^{[1
]}

Pan, ZS ^{[1
]}

Jin, LT ^{[1
]}

机构：

[1] E China Normal Univ, Dept Chem, Shanghai 200062, Peoples R China

来源：

TALANTA | 2006年 / 68卷 / 03期

关键词：

chemical oxygen demand (COD); photocatalytic oxidation; TiO2; Ce(IV); synergistic reaction; ultraviolet spectrophotometry;

D O I：

10.1016/j.talanta.2005.04.074

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A new photocatalytic system, nano-TiO2-Ce(SO4)(2) coexisted system, which can be used to determine the low chemical oxygen demand (COD) is described. Nano-TiO2 powders is used as photocatalyst in this system. The measuring method is based on direct determination of the concentration change of Ce(IV) resulting from photocatalytic oxidation of organic compounds. The mechanism of the photocatalytic oxidation for COD determination was discussed and the optimum experimental conditions were investigated. Under the Optimum conditions, a good calibration graph for COD values between 1.0 and 12 mg l(-1) was obtained and the LOD value was achieved as low as 0.4 mg l(-1). When determining the real samples, the results were in good agreement with those from the conventional methods. (c) 2005 Published by Elsevier B.V.

引用

页码：610 / 615

页数：6

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