Highly luminescent nanostructures of CdS and ZnS prepared by microwaves heating: effect of sulphide concentration

Abstract

AbstractNearly monodisperse and highly luminescent ZnS and CdS NPs were obtained by microwave irradiation. The ZnS and CdS NPs solutions were prepared by adding freshly prepared ZnSO4 or CdSO4 solution to a thioacetamide solution at pH 8 in the presence of sodium citrate in solution used as stabilizer. The precursors concentration were such that the sulphide ion concentrations were 3 × 10–2 M, 6 × 10–2 M and 8 × 10–2 M, for each of these [S] concentrations the [Zn] or [Cd] content were fixed at 3 × 10–2 M. NPs were prepared under microwave irradiation for 1 min at 905 W of power. The NPs samples were taken when the temperature descended to ambient temperature for further analysis. Effect of concentration of Cd and Zn ions were studied in the luminescence property. RXD, AFM, TEM and UV‐Vis were used too as analytical equipment for characterization. (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)