Abstract
Nanocomposites (NCs) of different band gap semiconductors provide better photocatalytic activity as compared to that of monolithic semiconductor nanoparticles (NPs). With the aim to investigate the effect of organic capping agent (thioglycerol; TG in the present study) on photocatalytic activity, ZnS-Ag2S NCs have been synthesized in the presence of TG using simple chemical precipitation route. For comparative studies, NCs have been synthesized under same synthesis conditions without TG. Structural studies were done using X-Ray diffraction (XRD) technique. Morphological features of as prepared samples were recorded by high resolution transmission electron microscopy (HRTEM). UV–Vis and photoluminescence studies were carried out to study the optical properties of synthesized samples. Photocatalytic studies of as-synthesized NCs have been carried out by selecting crystal violet (CV) as a model organic pollutant. It is observed that NCs (synthesized in absence of TG) exhibit better photocatalytic activity as compared to the TG capped NCs. The results of the present study may helpful in practical application of these composites in the area of photocatalysis and other related optical applications.
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