EFFECTS OF H2O2 METAL IONS ETC. ON THE PHOTOCATALYTIC REDUCTION OF DICHROMATE AND PHOTOCATALYTIC OXIDATION OF DICHLORVOS

doi:10.7517/j.issn.1674-0475.2002.06.435

Abstract

Abstract: Effects of H₂O₂、metal ions et al on the photocatalytic reduction of dichromate and photocatalytic oxidation of dichlorvos were studied.The results showed that with the addition of a small amount of H₂O₂,the photocatalytic reduction of dichromate was hindered,while the photocatalytic oxidation of dichlorvos was accelerated.With the addition of trace amounts of Cu²⁺,both of the two above mentioned reactions were accelerated.With the addition of Zn²⁺ and Na⁺,no obviously effects on the reactions were observed.With the addition of methanol and toluene,the photocatalytic reduction of dichromate was accelerated,while the photocatalytic oxidation of dichlorvos was hindered.The possible mechanisms of the additives on the photocatalytic reduction of dichromate and photocatalytic oxidation of dichlorvos were also investigated.

Key words: dichromate, dichlorvos, photocatalysis, oxidation, reduction, mechanism

CLC Number:

CHEN Shi-fu, CAO Geng-yu. EFFECTS OF H₂O₂ METAL IONS ETC. ON THE PHOTOCATALYTIC REDUCTION OF DICHROMATE AND PHOTOCATALYTIC OXIDATION OF DICHLORVOS[J]. Imaging Science and Photochemistry, 2002, 20(6): 435-440.

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EFFECTS OF H₂O₂ METAL IONS ETC. ON THE PHOTOCATALYTIC REDUCTION OF DICHROMATE AND PHOTOCATALYTIC OXIDATION OF DICHLORVOS

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