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    Ó¦´ó¼ÒÒªÇ󣬸½ÉÏCover letter£º

Dear Professor,

  We would like to submit the manuscript entitled "£¨ÎÄÕÂÌâÄ¿£¬´ÖÌ壩" by £¨¸÷¸ö×÷ÕßµÄÃû×Ö£©, which we wish to be considered for publication in Environmental Science & Technology.

  In this study, we have chosen an azo dye, C. I. Reactive Black 5 (RB5), as a model contaminant for investigating the degradation mechanism and reaction pathways of photocatalytic oxidation using a SrTiO3/CeO2 composite as the catalyst at pH 12.0. The feasibility of the SrTiO3/CeO2 composite which belongs to the representative perovskite-type oxides was testified by the characterization of the catalyst. Investigating characteristic absorption bands of RB5 at 254, 312 and 600 nm, the detailed mechanism of the photocatalytic oxidation of RB5 at pH 12.0 was elucidated through the use of different hvb+, •OH and ecb- scavengers and verified by total organic carbon (TOC) analysis, UV-visible spectroscopy, ion chromatography (IC) and gas chromatography/mass spectrometry (GC/MS) techniques.

  Little influence of iodide ion, tert-butyl alcohol, fluoride ion or persulfate ion as hvb+, •OH or ecb- scavengers on the decolorization proved that the decolorization of RB5 primarily proceeded by photolysis and/or O2•- in the bulk solution. After the decolorization, the process could shift progressively from the bulk solution to the surface of the catalysts and cleavage of the naphthalene and benzene rings was mainly attributed to the hvb+ pathway and •OHads reactions, which was further verified by the effect of scavengers.£¨Ç°Á½¶ÎÆäʵ¾ÍÊǰÑÎÄÕµÄabstractÉÔ΢¸ÄдÁËһϣ©

  Thank you very much for your considering our manuscript for potential publication. I'm looking forward to hearing from you soon.

Sincerely yours,

XXX

[ Last edited by ninny-86 on 2008-7-7 at 10:08 ]
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