Rapid Photocatalytic Degradation for Cationic Dyes Andsupercapacitor Property of 2d Novel Nickel Coordination Polymer and Its Ag-Loaded Product

A new two-dimensional (2D) nickel(II) coordination polymer (Ni-CP) has been synthesized hydrothermally, named as [Ni(DDB)0.5(2,2′-bipy)(H2O)]·H2O (H4DDB = 1,4-di(3,5-dicarboylphenoxy) benzene and 2,2′-bipy = 2,2′-bipyridine), and characterized by element analysis, TGA, PXRD, SEM and XPS techniques. Structural analysis shows that the coordination polymer possesses 2D waved network thought DDB4- ligand in μ4 fashion. The Ag-loaded product (Ag@Ni-CP) has been prepared by light reduction method. Photocatalytic degradation performance of Ni-CP and Ag@Ni-CP were investigated, and the latter exhibits excellent degradation effect, especially for Rhodamine B and methylene blue with the high degradation rate of 99% rapidly in 60 min. Compared with the reported MOFs catalyst materials, Ag@Ni-CP exhibits higher and faster degradation performance. The photocatalytic mechanism was investigated by free radical trapping experiments. The electrochemical performance tests show that Ni-CP has good electrical capacity and cycle stability, which means it might be a good supercapacitor in the future.