不同PAN纤维铁配合物光催化偶氮染料降解反应  

DEGRADATION OF AZO DYE CATALIZED BY DIFFERENT PAN FIBER-Fe COMPLEXES

作　　者：韩振邦[1] 董永春[1,2] 马斌[1] 杜芳[1] 刘春燕[1,2] 

机构地区：[1]天津工业大学纺织学院纺织化学与生态研究中心,天津300160 [2]福州大学光催化国家重点实验室培育基地,福州350002

出　　处：《太阳能学报》2011年第3期408-415,共8页Acta Energiae Solaris Sinica

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

摘　　要：分别使用水合肼、盐酸羟胺及其混合物对聚丙烯腈(PAN)纤维进行改性反应,并将所得改性PAN纤维分别与三氯化铁反应得到3种改性PAN纤维铁配合物。将其作为非均相Fenton催化剂应用于偶氮染料活性红195的氧化降解反应中,重点考察和比较了3种改性PAN纤维铁配合物的催化活性及其稳定性,同时研究了辐射光、铁离子含量和pH值对其催化活性的影响。结果表明:3种改性PAN纤维铁配合物对染料降解反应都具有催化作用,其中由水合肼和盐酸羟胺混合改性PAN纤维铁配合物的催化活性最高,并且辐射光和铁离子含量的增加都能够显著提高它们的催化活性。尽管pH值的升高会降低其催化活性,但是当水合肼和盐酸羟胺混合改性PAN纤维铁配合物被使用时,在pH=8.0和反应90min的条件下仍有约60%的染料被降解。3种改性PAN纤维铁配合物都可以重复使用,但是其催化活性随着使用次数的增加会逐渐下降。Catalytic performance and their stability of three modified PAN fiber-Fe complexes were investigated and compared, and effect of irradiation, Fe content and the solution pH on their catalytic activity was also examined. The results of three modified PAN fiber-Fe complexes indicated that catalytic performance for dye degradation, and hydroxylamine and hydrazine mixing modified PAN fiber-Fe complex have the highest catalytic activity. Irradiation and increasing Fe content improves significantly their catalytic performance. High pH level reduces the catalytic activity of three modified PAN fiber-Fe complexes, but about 60% dye are decomposed within 90min at pH = 8.0 when hydroxylamine and hydrazine mixing modified PAN fiber-Fe complex are used. Moreover, three modified PAN fiber-Fe complexes are reused for dye degradation, and their catalytic performance gradually decreases with recycle number increasing.

关 键 词：改性PAN纤维 铁离子 配合物 催化性能 染料降解 

分 类 号：TQ342.31[化学工程—化纤工业] X703[环境科学与工程—环境工程]