In the present work, Strontium titanate (SrTiO3), Azardirachta indica leaf extract, and coconut water doped Strontium titanate (SrTiO3) nanoparticles were successfully synthesized by the sol-gel technique. Strontium titanate has been used in various areas of applications, such as flat panel displays, tunable microwave capacitors, radioisotope power systems, tunable multilayer capacitors, semi-conductive ceramics, microwave solitons, varistors, and pyroelectric far-infrared detectors, etc. The synthesized samples were analyzed by X-Ray Diffraction (XRD), Fourier-Transform Infrared spectroscopy (FTIR), Scanning Electron Microscopy (SEM), Energy-Dispersive X-ray spectroscopy (EDX), Cyclic Voltammetry (CV), and Electrochemical Impedance Spectroscopy (EIS). From the XRD analysis, it was found that the structures of the prepared samples were, cubic and their size decreased with doping. FTIR band at 513 cm-1 was observed due to Sr-Ti-O stretching vibration. EDX analysis reveals the elemental compositions of the samples. Cyclic voltammetry results revealed that the prepared strontium titanate exhibited pseudocapacitive behavior. The EIS studies, suggest that strontium nanoparticles synthesized has a higher charge transfer resistance than Azadirachta indica, and coconut water doped Strontium titanate (SrTiO3) nanoparticles.