【摘要】 首先利用层层自组装技术对聚丙烯酸改性聚四氟乙烯（PTFE）纤维（PAA-g-PTFE）进行改性,得到层层自组装改性PTFE纤维（LBL-PAA-g-PTFE）,然后制备两种相应的铁配合物（Fe-LBL-PAA-g-PTFE和Fe-PAA-g-PTFE）,将其作为光Fenton反应催化剂应用于染料的氧化降解反应中,考察并比较其催化性能。结果表明,LBL-PAA-g-PTFE可与Fe³⁺离子进行配位反应生成相应的铁配合物,提高聚二烯丙基二甲基氯化铵（PDDA）/聚苯乙烯磺酸钠（PSS）层数和Fe³⁺离子初始浓度有利于配位反应的进行。SEM和FTIR分析证明,Fe³⁺离子已与其PSS表面层上的-SO₃^-发生配位反应生成了相应的铁配合物。Fe-LBL-PAA-g-PTFE的催化活性比Fe-PAA-gPTFE更显著,这可能是前者特殊的层层自组装结构导致其配位键不饱和度更高所致,它不仅对H₂O₂具有更强的催化分解性,对光辐射的吸收性也更高。更多还原

【Abstract】 Layer-by-layer self-assembly modified PTFE fiber（LBL-PAA-g-PTFE）is obtained by a layer-bylayer self-assembly process for the grafted PTFE fiber（PAA-g-PTFE）,and then is coordinated with Fe3⁺ions to produce two modified PTFE fiber Fe complex（Fe-LBL-PAA-g-PTFE and Fe-PAA-g-PTFE）,which is characterized and used as a heterogeneous Fenton catalyst for the dye degradation under visible irradiation.Photocatalytic activity of the resulting complexes is also investigated.The results indicate that LBL-PAA-g-PTFE successfully reacts with Fe（III）ions to form the complex.Increasing PSS/PDDA bilayers and initial concentration of Fe3⁺ion is beneficial to the coordination reaction.SEM and FTIR analysis shows that the Fe3⁺ions have been coordinated with-SO₃^-on the surface layer of PSS to produce the corresponding iron complexes.Fe-LBL-PAA-g-PTFE shows better catalytic activity than Fe-PAA-g-PTFE,owing to its special self-assembly structure leads to the higher coordinating unsaturation and stronger adsorption performance,making it not only has stronger catalytic activity for the decomposition of H₂O₂,but also shows better light absorption characteristics.更多还原