改性PAN纤维铁配合物暗态催化偶氮染料降解反应

利用偕胺肟改性聚丙烯腈（PAN）纤维和三氯化铁的配位反应制备改性PAN纤维铁配合物（Fe-AO-PAN），然后将其作为非均相Fenton反应催化剂应用于不同结构偶氮染料的降解反应中，重点考察Fe-AO-PAN的添加量（M）和铁离子含量（CFe-PAN）与暗态时染料的脱色率（D）和初始反应速率常数（k）之间的关系。此外还研究了暗态时偶氮染料的降解反应过程以及无机盐的影响。结果表明：Fe-AO-PAN暗态时能够催化偶氮染料的降解，并且使活性染料的k值明显高于酸性染料；暗态时Fe-AO-PAN的M和CFe-PAN与染料降解反应50min时的D和k值之间存在着线性关系，可通过定量增加Fe-AO-PAN的M和CFe-PAN来促进暗态时染料的降解反应，达到其在辐射光时的降解效果。

Modified PAN fiber-Fe (III) complex catalyzing degradation of azo dyes in dark

A modified PAN fiber-Fe (III) complex (Fe-AO-PAN) was prepared by a coordinated reaction between amidoximated PAN fiber and ferric chloride solution, and then used as a heterogeneous Fenton catalyst for the degradation of azo dyes with different structures. The relationship between Fe-AO-PAN dosage (M), ferric content of Fe-AO-PAN, decolorization rate (D), and initial degradation rate constant (k) of the dyes in the dark was investigated. Moreover, degradation process of the dyes and the effect of inorganic salt on degradation were also studied. The results indicated that the oxidative degradation of the azo dyes in water could be catalyzed effectively by Fe-AO-PAN in the dark, and reactive dyes showed higher initial degradation rate constants than acid dyes at the same conditions. Besides, there exists a linear relationship between M and CFe-PAN and D and k within initial reaction 50 min in the dark, and increasing quantitatively M and CFe-PAN could accelerate the dye degradation and obtain the same degradation effect as under irradiation.