关键词:

1,4-二氯苯, Pt电极, 电化学氧化, 乙腈-水

Abstract:

The anodic oxidation of 1,4-dichlorobenzene in acetonitrile-aqueous solution was investigated on a platinum electrode.The cyclic voltammetric (CV) profiles showed that the oxidation potential region of 1,4-dichlorobenzene was about 2.0—2.3 V(vs SCE).Moreover, the effect of different scan rates on CV curves implied that oxidation reaction of 1,4-dichlorobenzene was controlled by diffusion process.Additionally, the major intermediates detected by liquid chromatography (LC) and liquid chromatography/mass spectrometry (LC/MS) were parachlorophenol, 1,4-benzoquinone and 2,5-dichloro-p-benzoquinone.The variation of the concentrations of related anions (oxalate, acetate, formate, maleate and chloride ion) during the reaction process was ascertained by ion chromatography (IC).On the basis of these findings, two tentative degradation pathways, hydroxyl radical attacking of the atom of carbon in benzene ring and dechlorination of 1,4-dichlorobenzene were described.

Key words:

1,4-二氯苯, Pt电极, 电化学氧化, 乙腈-水