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首页> 外文期刊>Materials Chemistry and Physics. >Novel synthesis of WO_3 nanocrystals through pyrolytic decomposition of tungstate-based inorganic-organic hybrid nanobelts
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Novel synthesis of WO_3 nanocrystals through pyrolytic decomposition of tungstate-based inorganic-organic hybrid nanobelts

机译：钨酸盐基无机-有机杂化纳米带的热分解新合成WO_3纳米晶体

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摘要

The paper described a novel approach toward WO_3 nanocrystals by pyrolytically decomposing tungstate-based inorganic-organic hybrid nanobelts in air at 500-600 ℃ for 2h. The above-mentioned hybrid nanobelts were derived via a reaction of layered H_2W_2O_7·xH_2O and n-octylamine in a reverse-micelle-like medium (H_2W_2O_7·xH_2O -octylamine/heptane). The as-obtained WO_3 nanocrystals and their intermediate products were characterized by the techniques of X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM & FE-SEM), thermoanalysis (TG-DSC), Fourier-transform infrared spectra (FT/IR), UV-vis absorption and X-ray photoelectron spectroscopy (XPS). The as-obtained WO_3 nanocrystals had an apparent size of 20-50 nm, and took on a loose-aggregate-like morphology. The WO_3 nanocrystals derived via the pyrolytic decomposition process were almost separated from each other and could be redispersed readily, while the WO3 nanocrystals obtained by the conventional acid-precipitation process tightly agglomerated into large particles with apparent sizes of several micrometers, without redispersibility even under an intense sonication treatment.
机译：文章描述了一种新的制备WO_3纳米晶体的方法，该方法是在空气中于500-600℃下热解钨酸盐基无机-有机杂化纳米带2小时。上述杂化纳米带是通过层状的H_2W_2O_7·xH_2O与正辛胺在反胶束状介质（H_2W_2O_7·xH_2O /正辛胺/庚烷）中反应而得到的。通过X射线衍射（XRD），透射电子显微镜（TEM），扫描电子显微镜（SEM＆FE-SEM），热分析（TG-DSC），傅里叶技术对表征的WO_3纳米晶体及其中间产物进行表征。 -变换红外光谱（FT / IR），紫外可见吸收和X射线光电子能谱（XPS）。所获得的WO_3纳米晶体的表观尺寸为20-50nm，并且呈现出松散的聚集体状形态。通过热分解过程得到的WO_3纳米晶体几乎彼此分离并且可以很容易地再分散，而通过常规酸沉淀法获得的WO3纳米晶体紧密团聚成表观尺寸为几微米的大颗粒，即使在高温下也没有再分散性。强烈的超声处理。

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  • 来源
    《Materials Chemistry and Physics.》 |2009年第3期|507-513|共7页
  • 作者

    Deliang Chen; Hejing Wen; Huimin Chen; Hailong Wang; Rui Zhang; Hongliang Xu; Daoyuan Yang; Hongxia Lu;

  • 作者单位

    School of Materials Science and Engineering, Zhengzhou University, 100 Science Road, Zhengzhou 450001, PR China;

    School of Materials Science and Engineering, Zhengzhou University, 100 Science Road, Zhengzhou 450001, PR China;

    School of Materials Science and Engineering, Zhengzhou University, 100 Science Road, Zhengzhou 450001, PR China;

    School of Materials Science and Engineering, Zhengzhou University, 100 Science Road, Zhengzhou 450001, PR China;

    School of Materials Science and Engineering, Zhengzhou University, 100 Science Road, Zhengzhou 450001, PR China;

    School of Materials Science and Engineering, Zhengzhou University, 100 Science Road, Zhengzhou 450001, PR China;

    School of Materials Science and Engineering, Zhengzhou University, 100 Science Road, Zhengzhou 450001, PR China;

    School of Materials Science and Engineering, Zhengzhou University, 100 Science Road, Zhengzhou 450001, PR China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    nanostructures; semiconductors; chemical synthesis; crystal growth;

    机译：纳米结构半导体;化学合成晶体生长;

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