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超臨界甲醇中前驅物對制備超細鎳粉體的影響
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沈陽化工大學 化學工程學院,沈陽化工大學 化學工程學院,沈陽化工大學 化學工程學院,沈陽化工大學 化學工程學院,沈陽化工大學 化學工程學院,沈陽化工大學 化學工程學院,沈陽化工大學 化學工程學院

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TG146

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遼寧省博士科研啟動基金資助（20111047, 20121070），遼寧省高等學校優(yōu)秀人才支持計劃（LR2012012, LJQ2012034）


The Effect of Precursors on the Preparation of Ultrafine Nickel Powder by using Supercritical Methanol
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College of Chemical Engineering, Shenyang University of Chemical Technology,College of Chemical Engineering, Shenyang University of Chemical Technology,College of Chemical Engineering, Shenyang University of Chemical Technology,College of Chemical Engineering, Shenyang University of Chemical Technology,College of Chemical Engineering, Shenyang University of Chemical Technology,College of Chemical Engineering, Shenyang University of Chemical Technology,College of Chemical Engineering, Shenyang University of Chemical Technology

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    摘要:

    本文以不同的鎳基前驅物（氧化鎳、乙酸鎳、硝酸鎳）在超臨界甲醇條件下制備超細鎳粉體，考察了體系溫度、壓力、反應時間以及前驅物種類對制備超細鎳粉體的影響。通過SEM和XRD對制備產物的形貌和物相進行表征分析。結果表明，超臨界甲醇的還原性隨著溫度和壓力的升高而顯著增強，在反應體系中，甲醇既起到溶劑作用又起到還原劑的作用。此外，通過考察前驅物種類對制備過程的影響可知，前驅物的種類對制備超細鎳有顯著的影響，乙酸鎳在超臨界甲醇250 ℃，9 MPa條件下即能夠得到純的超細鎳，硝酸鎳則需要更高的溫度和壓力（280 ℃，14.0 MPa），而以氧化鎳為前驅物時即使在300 ℃，20 MPa的條件下也只得到鎳和氧化鎳的混合物。

    Abstract:

    Nickel power was synthesized using supercritical methanol with different nickel precursors (NiO, Ni(CH3COO)2, Ni(NO3)2). The impacts of temperature, pressure, reaction time, and kinds of precursors on the preparation of nickel, were investigated. XRD and SEM were applied to analyze the composition and morphology of the synthesized products. Results showed that the reducing capacity of supercritical methanol was enhanced obviously with the increasing of temperature and pressure. In the reaction system, methanol both played roles of reaction medium and reducing agent. In addition, it was known by studying the influence of precursor kinds on the process that the kind of precursor had a great effect on the preparation of ultrafine nickel. Pure ultrafine nickel could be obtained at the supercritical methanol of 250 ℃, 9 MPa using Ni(CH3COO)2 as precursor. While more higher temperature (280 ℃) and pressure (14.0 MPa) were needed for Ni(NO3)2. When NiO was used as precursor, the mixture of Ni and NiO was obtained even at the more drastic condition of 300 ℃ and 20 MPa.

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李雙明,牛明舉,葛新,沈殿旭,王歡,李文秀,于三三.超臨界甲醇中前驅物對制備超細鎳粉體的影響[J].稀有金屬材料與工程,2016,45(5):1345~1348.[li shuang ming, niu ming ju, ge xin, shen dian xu, wang huan, li wen xiu, yu san san. The Effect of Precursors on the Preparation of Ultrafine Nickel Powder by using Supercritical Methanol[J]. Rare Metal Materials and Engineering,2016,45(5):1345~1348.]
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  • 收稿日期:2014-05-15
  • 最后修改日期:2014-08-27
  • 錄用日期:2014-11-20
  • 在線發(fā)布日期: 2016-06-02
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