Kinetics of oxygen adsorption on ZnS nanoparticles synthesized by precipitation process

Abstract

ZnS nanoparticles were synthesized through a one-step precipitation process. Effect of time and temperature on the formation reaction was investigated. The synthesized samples were characterized by X-ray diffraction (XRD), ultraviolet (UV) visible absorption and photoluminescence (PL) spectrophotometry. Based on XRD and UV-Vis data, the particles produced at 70°C had a mean particle size of about 5 nm. Increasing time and temperature of the synthesis reaction resulted in photoluminescence intensification. PL spectroscopy helped understanding the adsorption kinetics of oxygen on ZnS nanoparticles during the precipitation synthesis process. Fabrication of ZnS structures with appropriate oxygen adsorption capacity was suggested as a means of PL emission intensity control.

Mixed structure Zn(S,O) nanoparticles: synthesis and characterization

“…It is a promising material for various applications such as ultraviolet light emitters, flat panel displays, spin functional devices, transparent conductive oxides, gas sensors and surface acoustic wave devices [4,[20][21][22]. There has been much consideration on the synthesis of nanoparticles of both these semiconductors by various techniques which include chemical vapor deposition, thermal evaporation, sol-gel, combustion, hydrothermal, non-hydrolytic high temperature injection method, microwave irradiation, solvothermal, mechanical ball milling, coprecipitation etc., [8,17,[23][24][25][26][27][28][29]. Among these techniques, coprecipitation is a conventional wet chemical technique to synthesize materials with high yield in mass production [29][30][31].…”