Structural, optical, magnetic and electrochemical properties of pure and cobalt-doped cadmium monosulfide by the hydrothermal process

Abstract

Effect of pure and cobalt-doped (2% and 3%) cadmium monosulfide nanoparticles were successfully synthesized. The obtained samples were characterized by XRD, SEM-EDX, TEM, UV–visible, PL, VSM and CV analysis. The cubic structure was confirmed from the XRD results. The surface morphology and composition purity of the prepared samples was characterized by the SEM-EDX studies. The spherical morphology of the particle size is found to be 14nm, 12nm and 9nm, which is confirmed from the XRD results. The blue shifted are occurred compared to the bulk value; this was due to quantum size effect (QSE) from the UV–visible analysis and it could be used for optical devices. The PL spectra revealed that the all samples were presented in visible emission at 375nm due to sulfur vacancy defects. The ferromagnetic behavior is observed from the obtained product, which given results indicates of high magnetic moment (3% cobalt doped) for obtaining the hysteresis loop. The above electrochemical reactions shows, the super capacity behavior increased for the (3%) cobalt-doped cadmium monosulfide sample and its used for electrode applications.