Abstract
A new bidentate NN-Schiff base ligand of vanillin, (E)-4-(((2-amino-5-nitrophenyl)imino)methyl)-2-methoxyphenol, was synthesized and characterized by different spectroscopic techniques. In addition, mononuclear complexes were synthesized by treating the corresponding metal salts of Ni2+, Cu2+ and VO2 and Schiff base ligand in methanol. The resulting complexes were characterized by FT-IR, UV–Vis and 1H NMR techniques. The hybrids of complex/TiO2 nanoparticles were prepared and their structure and morphology were characterized by FT-IR, XRD, TEM, SEM and solid state UV–Vis absorption. Furthermore, Kubelka–Munk transformations were used to measure the absorption curves and band gap. The photocatalytic activities of the prepared modified semiconductors were tested under visible radiation for the degradation of methylene blue in the aqueous solution. The results indicated that the incorporation of these complexes improved the activation of TiO2 with visible light.
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