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Preparation of Cobalt Nanofibres by Means of Mild Thermal Precipitation and Thermal Decomposition Process
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Preparation of Cobalt Nanofibres by Means of Mild Thermal Precipitation and Thermal Decomposition Process
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NSFC(51002126 and 51004066); Open Project of State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials (10zxfk30)

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    摘要:

    以CoSO3和(NH4)2C2O4·H2O為原料，通過(guò)65 ℃的溫?zé)岢恋矸磻?yīng)和溫?zé)彡惢^(guò)程，控制合成了水合草酸鈷納米棒。以水合草酸鈷納米棒為前驅(qū)體，在Ar氣氛中于360 ℃下，通過(guò)熱分解過(guò)程制備納米金屬鈷纖維。實(shí)驗(yàn)樣品采用AAS，OEA，F(xiàn)T-IR，TGA-DTG，XRD和SEM測(cè)試技術(shù)進(jìn)行分析。測(cè)試結(jié)果表明：溫和液相沉淀法制備的樣品為水合草酸鈷，其化學(xué)式可寫(xiě)為CoC2O4·3H2O。制備的草酸鈷納米棒直徑為0.2 ~ 0.4 μm，長(zhǎng)度為1.0 ~ 5.0 μm；熱分解制備的金屬鈷納米纖維的直徑約0.2 μm，長(zhǎng)度為1.0 ~ 5.0 μm。

    Abstract:

    Through a mild thermal precipitation and aging process, hydrated cobalt oxalate nanorods were synthesized using CoSO3 and (NH4)2C2O4·H2O as raw materials at the reaction and aging temperature of 65 °C. Afterwards, the metal cobalt nanofibres were prepared by decomposition of cobalt oxalate nanorods precursor in Ar gas atmosphere. The composition and morphology of products were characterized by means of atomic absorption spectrometer (AAS), organic elemental analyzer (OEA), Fourier transform infrared spectroscopy (FT-IR), thermogravimetry analysis and derivative thermogravimetry (TGA-DTG), the X-ray diffraction (XRD), and scanning electron microscope (SEM). The results demonstrate that the product is hydrated cobalt oxalate, and the chemical formula CoC2O4·3H2O is confirmed. The sizes of the cobalt oxalate nanorods as-prepared are about 0.2-0.4 μm in diameter, and 1.0-5.0 μm in length; the metal nanofibres prepared via decomposition process of hydrated cobalt oxalate nanorods are about 0.2 μm in diameter, and 1.0-5.0 μm in length.

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李 濤,劉 穎,何登良,馬國(guó)華. Preparation of Cobalt Nanofibres by Means of Mild Thermal Precipitation and Thermal Decomposition Process[J].稀有金屬材料與工程,2012,41(9):1527~1530.[Li Tao, Liu Ying, He Dengliang, Ma Guohua. Preparation of Cobalt Nanofibres by Means of Mild Thermal Precipitation and Thermal Decomposition Process[J]. Rare Metal Materials and Engineering,2012,41(9):1527~1530.]
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  • 收稿日期:2011-09-05
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