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Super-hierarchical Ni/porous-Ni/V2O5 nanocomposites

机译：すr-hiera r chuka l / poro s-/ v2 5非m poss s

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摘要

Hierarchical nanomaterials are of great interest due to their unique surface properties such as large surface area and high reactivity. In the present research, super-hierarchical (porous-) nickel hosted vanadium oxide (Ni/porous-Ni/V2O5) nanocomposite was fabricated using a simple, low-cost, and environmentally-friendly method. A nickel substrate was electrodeposited with vertical pores of similar to 10 mm in diameter through hydrogen bubbles as "dynamic templates". Two-dimensional V2O5 nanosheets were subsequently synthesized directly on the Ni/porous-Ni substrate surface using a hydrothermal method followed by annealing. Peony-like micro-configuration of V2O5 was found and crystallography was confirmed using high-resolution characterization. Further analysis indicated that the interface was formed between Ni (111) and V2O5 (100). The small lattice mismatch of 1.2% at the interface facilitated the 2D directional growth of V2O5 nanosheets on the Ni surface. The specific surface area and porosity of annealed Ni/porous-Ni/V2O5 nanocomposite was as high as 15.3 m(2) g(-1) and 55.1%. The advantage of the structure was found in the heat dissipation. Such super-hierarchical structure is anticipated to be used in applications such as coatings to improve cooling of macro-and micro-devices.
机译：由于其独特的表面特性，如大表面积和高反应性，等级纳米材料具有很大的兴趣。在本研究中，使用简单，低成本和环保的方法制造超级等级（多孔 - ）镀镍氧化物（Ni /多孔-NI / V2O5）纳米复合材料。通过氢气泡为“动态模板”，用直径为10mm的垂直孔被电沉积镍基质。随后使用水热方法直接在Ni /多孔 - Ni底物表面上合成二维V2O5纳米片，然后通过退火。发现V2O5的牡丹微结构，并使用高分辨率表征确认晶体学。进一步的分析表明，在Ni（111）和V2O5（100）之间形成界面。在界面处的1.2％的小晶格错配促进了Ni表面上V2O5纳米片的2D方向生长。退火的Ni /多孔 - Ni / V2O5纳米复合材料的比表面积和孔隙率高达15.3m（2）g（-1）和55.1％。在散热中发现了结构的优点。预计这种超级等级结构将用于诸如涂层的应用中，以改善宏观和微器件的冷却。

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  • 来源
    《RSC Advances》 |2017年第64期|共9页
  • 作者

    Yue Yuan; Ma Lian; Sun Jingze; Jeong Hae-Kwon; Liang Hong;

  • 作者单位

    Texas A&

    M Univ Dept Mat Sci &

    Engn College Stn TX 77843 USA;

    Texas A&

    M Univ Dept Mech Engn College Stn TX 77843 USA;

    Texas A&

    M Univ Dept Chem Engn College Stn TX 77843 USA;

    Texas A&

    M Univ Dept Mat Sci &

    Engn College Stn TX 77843 USA;

    Texas A&

    M Univ Dept Mat Sci &

    Engn College Stn TX 77843 USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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