HYDROPHILIC COLLOIDAL CdS PARTICLES: SYNTHESIS, STABILIZATION MECHANISM, SPECTRAL, OPTICAL AND PHOTOCATALYTIC PROPERTIES

Hydrophilic colloidal particles of cadmium sulfide CdS were obtained by chemical condensation. To form a hydrophilic shell an approach based on the formation of a micelle-like structure around CdS nanoparticles was used. The CdS micelle were formed due to the formation of stable complexonates with ethylenediaminetetraacetic acid anions by surface cadmium atoms. The mechanism of aggregation stability of CdS nanoparticles in aqueous solutions was studied. Optical, spectral and photocatalytic properties of both nanostructured powders agglomerated from hydrophobic CdS nanoparticles and isolated hydrophilic CdS nanoparticles in a colloidal solution were investigated.