Articles written in Bulletin of Materials Science

    • Morphological changes of ZnO nanoparticles, directed by urea/thiourea-based tripodal organic ligands and their photocatalytic properties


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      ZnO nanoparticles (NPs) are used in optics, electronics, sensing, lasers, photocatalysis devices, etc. These applications are morphology as well as size dependent, which can be tailored by surface directing agents. In this study, we have investigated the effect of 4 tripodal ligands bearing urea/thiourea group, i.e., 1, 2, 3 and 4, on the morphology of surface-modified ZnO NPs, i.e., 1Z, 2Z, 3Z and 4Z, respectively, synthesized at room temperature (30–40°C) under alkaline conditions. Ligands are used to obtain surface-modified ZnO with various morphologies at room temperature. Extended hexagonal nanorods (${\sim}$2–3 ${\mu}$m length and ${\sim}$400 nm breadth), layered (flakes self-assemble to form a layered structure), polydisperse disk shaped [micron-sized (2–3 ${\mu}$m) and nano-sized (300–400 nm) particles and nanorods (1–1.5 ${\mu}$m length and 130–165 nm breadth) like morphology are observed for 1Z, 2Z, 3Z and 4Z, respectively. 1Z nanorods have sharp ends, while 4Z nanorods have semi-circular ends. Photocatalytic studies of these surface-modified ZnO NPs have been evaluated by Rhodamine B dye degradation.

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