Abstract
ZnO nanoparticles (NPs) have been synthesised by co-precipitation method using zinc nitrate in the presence of two different alkali hydroxides. The XRD analysis of as-prepared products, before and after washing demonstrates its importance in removal of the water soluble nitrates of alkali metals formed during co-precipitation. The X-ray diffraction patterns of the synthesised ZnO NPs confirm the formation of ZnO with hexagonal wurtzite phase. The ZnO NPs synthesised, as confirmed by the XRD pattern, in the presence of NaOH show comparatively smaller crystallite size. These quasi-spherical ZnO NPs show strong UV absorption and dominant visible PL emission, suitable for biomedical and photocatalytic applications.
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