In this research, in the first part a core-shell magnetic support, Fe 3 O 4 @SiO 2 , was synthesized and a sugar-based ligand was immobilized on this support. The copper(II) complex was formed by the reaction of Cu(II) ions with modified support. Different methods such as FT-IR, CHN, TGA, FE-SEM, TEM, and ICP/OES were used for characterization of the immobilized complex. It was also used as a heterogeneous catalyst for the synthesis of various types of tetrazoles. The obtained tetrazoles were recognized by melting point and FT-IR spectroscopy. In the second part, titanium dioxide nanotubes were synthesized by anodizing method. In order to investigate the supercapacitor properties of these compounds by the chemical bath deposition method, the precursor of vanadium alkoxide was doped on the surface of nanotubes with constant concentration at different times. The synthesized samples were heated at 450 °C to achieve a uniform titanium dioxide phase. These compounds were identified by FE-SEM, EDX, XRD, and Raman spectroscopy. The characteristics of the supercapacitor were examined by using cyclic voltammetry (CV) and galvanostatic charge-discharge (GCD) methods, which showed T 4 sample had the best supercapacitor performance with 45.8 mF.cm -2 special capacity.