Synthesis of Flower-like Zinc Oxalate Microspheres in Ether-water Bilayer Refluxing Systems and Their Conversion to Zinc Oxide Microspheres

Abstract

Abstract: Flower-like zinc oxalate with a mean diameter of 50 μm was synthesized via the reaction of zinc acetate and dimethyl oxalate in ether-water bilayer refluxing systems at low temperature. Flower-like zinc oxalate microspheres can be further transformed into the similar morphology to zinc oxide by the decomposition of zinc oxalate at 500°C. Scanning electron microscopy (SEM), X-ray diffraction (XRD), thermogravimetric analysis-differential scanning calorimetric (TG-DSC), energy dispersive X-ray spectrum (EDX) and Fourier transforminfrared spectroscopy (FT-IR) were used to characterize the structure features and chemical compositions of the as-synthesized products. The UV-Vis and photoluminescence spectrum of flower-like zinc oxide microspheres were studied. The experimental results showed that flower-like zinc oxalate microspheres may be self-assembled by the zinc oxalate flakes. The ether-water volume ratio of 4:1 and refluxing temperature of 40°C were considered to favor the preparation of flower-like zinc oxalate microspheres.

Key words: Bilayer refluxing system, Zinc oxalate, Zinc oxide, Flower-like microspheres

Liang Ni, Lei Wang, Bing Shao, Yinjue Wang, Wenli Zhang, Yong Jiang. Synthesis of Flower-like Zinc Oxalate Microspheres in Ether-water Bilayer Refluxing Systems and Their Conversion to Zinc Oxide Microspheres[J]. J Mater Sci Technol, 2011, 27(6): 563-569.

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