The Fabrication Of Composite Materials Based On Polypyrrole And Polyoxometalate And Their Photocatalytic Performance

Under hydrothermal condition,a new Keggin type polyoxometalates,CuSiW₁₂ was prepared,and its structure was characterized by single crystal X-ray diffraction.Then pyrrole?Py?was loaded on CuSiW₁₂ surface through a facile in situ chemical oxidation polymerization process,and its composite material with polypyrrole is synthesized.Their morphologies were characterized by scanning electron microscope?SEM?,The structures and morphologies of CuSiW₁₂ and its composite material with ppy were characterized by powder X-ray diffraction?XRD?and fourier transform infrared spectroscopy?FTIR?.Their photooptical response range are studied by UV-Vis diffuse reflectance spectroscopy?DRS?.DRS shows that these CuSiW₁₂ exhibit a strong photoresponse in the UV light regions.But in visible light regions its photoresponse is very weak.On the contrary the composite material exhibits a strong photoresponse in the uv and visible light regions.Photocatalytic shows that CuSiW₁₂ exhibits no effect on the decomposition of RhB,because it is an ultraviolet light active photocatalyst.On the contrary,PPy/CuSiW₁₂ showed superior ability of photocatalytic degradation of rhodamine B than POM.Then under hydrothermal condition,a new Standberg type polyoxometalates,ZnP₂Mo₅ was prepared.Its structure was characterized by single crystal X-ray diffraction.With solvothermal method,we successfully prepared the ZnP₂Mo₅NR.A new type of composite material PPy/ZnP₂Mo₅NR was fabricated by the combination of ZnP₂Mo₅NR and pyrrole via a facile in situ chemical oxidation polymerization process.DRS shows that the composite material exhibits a strong photoresponse in the visible light regions,while the ZnP₂Mo₅NR exhibits a strong photoresponse only in UV light region,in the visible light regions is very weak.Under the irradiation of visible light,the PPy/ZnP₂Mo₅NR composite material exhibited inproved photocatalytic activity than ZnP₂Mo₅NR,PPy and their mechanically blended productsb on the degradation of Rhodamine B?RhB?.The results accord with UV-VIS diffuse reflection spectroscopy result.