Controlled synthesis of polycrystalline nickel oxalate nanofibers by the mild thermal precipitation and aging process

Abstract

Via a mild thermal precipitation and aging process, polycrystalline hydrated nickel oxalate nanofibers were synthesized using nickel chloride and ammonium oxalate as raw materials, with pH 8.0 and temperature 60 °C. Atomic absorption spectrometer (AAS), organic elemental analyzer (OEA), fourier transform infrared spectroscopy (FT-IR), thermogravimetry-derivative thermogravimetry (TG-DTG), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) were used to characterize the products properties. The results demonstrated that the product was hydrated nickel oxalate. The sizes of hydrated nickel oxalate nanofibers were 100–150 nm in diameter, and 0.5–5.0 μm in length. A rational mechanism based on coordination self-assembly was discussed for the selective formation of the polycrystalline hydrated nickel oxalate nanofibers.

Keywords

inorganic materials / nanofiber / precipitation / optical spectroscopy / thermal analysis / transmission electron microscopy

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