EFFECT OF SYNTHESIS TEMPERATURE ON THE PARTICLE SIZE AND OPTICAL ENERGY BAND GAP OF Ni DOPED CdS NANOPARTICLES

In the present study, Ni-doped CdS nanoparticles (NPs) were synthesized at 55 0C and 100 0C via wet chemical precipitation method [1, 2]. The particle size of Ni-doped CdS NPs prepared at 55 0C and 100 0C was calculated as 1.9 and 2.2 nm, respectively using the Scherrer's equation. This result indicates that the XRD patterns of Ni-doped CdS NPs get broader upon decreasing the synhtesis temperature. In other words, it can be said that the size of NPs decreases as the synthesis of temperature decreases. The energy band gap of NPs was determined from the UV-Vis spectroscopy. It was observed that the energy band gap of Ni-doped CdS prepared at different temperatures increase with the decrease in the particle size owing to quantum confinement effect. Our results suggest that the synthesis temperature can be an alternative method to alter particle size and energy band gap of NPs [3,4].