金属卟啉/PMMA共聚物电纺纤维的制备与光催化性能研究

Preparation and photocatalytic properties of electrospun metalloporphyrin/PMMA copolymer fiber materials

合成出两种侧链带有双键的金属卟啉锌(MPTPPZn)和卟啉铜配合物(MPTPPCu),利用侧链的双键将金属卟啉配合物与甲基丙烯酸甲酯(MMA)进行共聚反应,得到两种金属卟啉/聚甲基丙烯酸甲酯(PMMA)共聚物:MPTPPCu/PMMA和MPTPPZn/PMMA;通过红外光谱(FT-IR)、核磁氢谱(^(1)H-NMR)和紫外-可见光(UV-Vis)对化合物的结构进行了表征;通过静电纺丝技术将金属卟啉/PMMA共聚物制备成电纺纤维材料,利用扫描电镜(SEM)研究了复合材料的形貌,用热重(TG)和荧光光谱研究了静电纺纤维的热稳定性和光学性质。探讨了含有金属卟啉的PMMA电纺纤维作为光催化剂对有机染料亚甲基蓝(MB)降解的催化活性。结果表明:金属卟啉/PMMA共聚物电纺纤维具有较高光催化活性,能够有效催化降解MB,且降解效率优于与金属卟啉共混的PMMA电纺纤维。

Two kinds of porphyrin ligands containing double bonds in side chains were synthesized by multi-step reaction using simple compounds,and the corresponding metal zinc and copper complexes were synthesized by organometallic salt method.Then,the metal porphyrin complexes were copolymerized with methyl methacrylate(MMA)to obtain two metalloporphyrin/PMMA copolymers:MPTPPCu/PMMA and MPTPPZn/PMMA.The structures of the compounds were characterized by FT-IR,^(1)H-NMR and UV-Vis spectra.Metalloporphyrin/PMMA copolymers were prepared into electrospun fiber materials by electrospinning technology.The morphologies of the composites were studied by SEM,and the thermal stability and optical properties of the electrostatic spun fibers were investigated by TGA and fluorescence spectra.The catalytic activity of PMMA electrospun fibers containing metal porphyrin as photocatalysts for the degradation of the organic dye methylene blue(MB)was explored.The research results showed that the photocatalytic degradation of methylene blue(MB)by metal porphyrin/PMMA copolymer was more efficient than that of PMMA electrospun fibers blended with metal porphyrin.