Abstract
Polycrystalline ZnO nanowires composed of nanosized grains were produced by pyrolizing one-dimensional (1D) zinc oxalate-based nanowires at 450°C. The oxalate-based nanowires were synthesized at 25°C–100°C in an aqueous solution with the aid of a hexamethyleneamide (HMA) template and catalytic ammonia. Due to its low solubility in aqueous solution, zinc oxalate was not the popular reactant for the synthesis of ZnO . With a fixed ammonia concentration and a HMA/[ ZnC2O4 ⋅ H2O ] molar ratio of 1, the growth of zinc oxalate-based wires was investigated by changing growth temperature and growth duration. Different growth behaviors were observed and explained based upon the decomposition rate of [Formula: see text] complex and the interaction between zinc oxalate molecules and surfactants. The best growth condition was at 80°C for less than 1 h. After low-temperature calcination at 450°C, zinc oxalate-based nanowires were pyrolized into polycrystalline ZnO nanowires. This synthesis provides a simple route to prepare nanoparticle-covered ZnO nanowires.
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