Add time:07/21/2019         Source:sciencedirect.com

A new inorganic–organic nanohybrid based on a Keggin-type polyoxomolybdate and a copper(II) semicarbazone complex, namely [Cu2(HL)2(PMo12O40)(OCH3)2(Cl)(H2O)]·8CH3OH·4H2O [HL = pyridine-2-carbaldehyde semicarbazone] (1) was synthesized by a sonochemical method. Single crystals of 1 were synthesized with the branched tube method. The nanohybrid 1 was characterized using FT-IR, PXRD, FESEM, TEM, EDX, UV–Vis, TG-DTA analysis and single-crystal X-ray diffraction. Single-crystal X-ray diffraction reveals that the PMo12O403− cluster acts as a bidentate inorganic ligand and coordinates two symmetrically equivalent [Cu(Cl)0.5(HL)(OCH3)(H2O)0.5] complexes. SEM and TEM images confirmed a highly porous plate-like morphology of the nanohybrid sample. To the best of our knowledge, 1 represents the first example of a hybrid based on POMs and semicarbazone Schiff base complexes. The photocatalytic properties of the nanohybrid 1 were investigated in detail and the results of the photocatalytic experiments show it can be used as an efficient and recoverable photocatalyst for the complete degradation of the cationic dyes methylene blue (MB) and rhodamin B (RhB).

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