非均相PAN-Fe催化剂在偶氮染料氧化降解反应中的应用  

Application of PAN-Fe as heterogeneous catalyst in oxidative degradation of azonic dyes

作　　者：杜芳[1] 董永春[1] 韩振邦[1] 王彦杰[1] 

机构地区：[1]天津工业大学纺织学院,天津300160

出　　处：《天津工业大学学报》2008年第6期23-26,共4页Journal of Tiangong University

基　　金：国家自然科学基金资助项目(20773093);教育部高等学校博士点专项基金资助项目(20070058005)

摘　　要：在室温条件下使用偕胺肟改性聚丙烯腈纤维与三氯化铁反应制备了聚丙烯腈铁(PAN-Fe)配合物,然后在过氧化氢存在的条件下将其作为非均相光Fenton催化剂应用于水溶性阴离子偶氮染料活性红195和酸性黑234的氧化降解反应中,考察了催化剂用量、光辐射强度、pH值和初始染料浓度对脱色率和反应速率常数的影响.结果表明,提高催化剂用量和辐射光强度有利于染料的脱色率和反应速率常数的增加,而初始染料浓度的升高则使其更不易发生降解反应;PAN-Fe催化剂在酸性介质比碱性介质中具有更好的催化活性.A modified polyacrylonitrile-Fe fibrous photocatalyst （PAN-Fe） is prepared by a reaction between PAN fibers containing amidoxime group and ferric chloride at room temperature, then it is applied to oxidative degradation of anionic water-soluble azonic dyes such as Active Red 195 and Acid Black 234 in the presence of H202, a few factors affecting the decoloration rate of dyes and reaction rate constant such as the amount of catalysts, irradiation intensity, pH value and concentration of the dyes on the photoeatalytie decoloration are investigated. The results indicate that the decoloration rate of dyes and reaction rate constant are improved by increasing the amounts of catalysts and improving radiation light intensity, however, increasing initial concentration of dyes goes against degradation reaction. In addition, the PAN-Fe catalyst has a higher catalytic activity in acidic medium than in the alkaline medium.

关 键 词：聚丙烯腈纤维 铁离子 光催化 偶氮染料 降解 

分 类 号：TS199[轻工技术与工程—纺织化学与染整工程] X791[轻工技术与工程—纺织科学与工程]