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A study on the synthesis and characterisation of nanocrystalline transition metal oxynitrides

机译:纳米晶过渡金属氧氮化物的合成与表征研究

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摘要

A different processing route to bimetallic oxynitrides has been developed using oxide precursors generated from coprecipitation of ethanolic solutions of the relevant metal chlorides. The nitridation of the mixed-metal precursors yields nanocrystalline oxynitrides. Representative group 5–group 6 transition metal oxynitrides, M1?x M′ x (O,N) (M = Nb, Ta; M′ = Mo, W) have been prepared and characterised by powder X-ray diffraction (PXD), scanning electron microscopy with energy dispersive analysis by X-rays (SEM/EDAX), transmission electron microscopy (TEM) with selected area electron diffraction (SAED), BET surface area measurements and SQUID magnetometry. The mixed-metal oxynitrides form rock salt structures (a ~4.3 ?) with disordered distributions of both cations and anions. The purity, particle size and surface area of materials are significantly dependent on nitridation temperature.
机译:使用由相关金属氯化物的乙醇溶液的共沉淀产生的氧化物前体,已经开发出了双金属氮氧化物的不同处理途径。混合金属前驱体的氮化产生纳米晶的氮氧化物。制备了具有代表性的5-6族过渡金属氧氮化物M1?x M'x (O,N)(M = Nb,Ta; M'= Mo,W),并用粉末表征X射线衍射(PXD),通过X射线进行能量色散分析的扫描电子显微镜(SEM / EDAX),具有选定区域电子衍射(SAED)的透射电子显微镜(TEM),BET表面积测量和SQUID磁力分析。混合金属氮氧化物形成盐离子结构(a〜4.3?),阳离子和阴离子均无序分布。材料的纯度,粒径和表面积显着取决于氮化温度。

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  • 来源
    《Journal of Materials Science》 |2007年第16期|6779-6786|共8页
  • 作者单位

    Department of Chemical Engineering Shanghai Institute of Technology 200235 Shanghai P.R. China;

    School of Chemical Environmental and Mining Engineering University of Nottingham Nottingham NG7 2RD UK;

    School of Chemistry University of Nottingham Nottingham NG7 2RD UK;

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  • 正文语种 eng
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