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首页> 外文期刊>CrystEngComm >Surfactant-free hydrothermal synthesis of hierarchical flower-like Bi2WO6 mesosphere nanostructures with excellent visible-light photocatalytic activity
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Surfactant-free hydrothermal synthesis of hierarchical flower-like Bi2WO6 mesosphere nanostructures with excellent visible-light photocatalytic activity

机译：具有优异的可见光光催化活性的等级花样Bi2wo6介质纳米结构的表面活性剂水热合成

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摘要

Hierarchical flower-like Bi2WO6 mesosphere nanostructures self-assembled with nanosheets were synthesized by hydrothermal treatment of an aqueous suspension of Bi(NO3)(3)center dot 5H(2)O and Na2WO4 center dot 2H(2)O without surfactants or mineralizers. The as-prepared hierarchical flower-like Bi2WO6 mesosphere nanostructures were characterized by X-ray diffraction, field-emission scanning electron microscopy, transmission electron microscopy (TEM), high-resolution TEM, selected-area electron diffraction, and nitrogen adsorption-desorption isotherms. To understand the formation mechanism of the hierarchical flower-like Bi2WO6 mesosphere nanostructures, a series of time-dependent experiments were carried out. In general, the synergistic effects of the higher solubility of bismuth subnitrate on the nucleation and adsorption of subnitrate radicals on the surfaces of (010) planes and combination with Bi3+ situated at (010) planes resulted in primary Bi2WO6 nanosheets of very smaller thickness and lateral size. To minimize further the system energy, the formed Bi2WO6 nanosheets self-assembled to hierarchical flower-like Bi2WO6 mesosphere nanostructures. In addition, the band gap and photocatalytic activity of the hierarchical flower-like flower-like Bi2WO6 mesosphere nanostructures were investigated by UV-vis absorption and we used it as a photocatalyst to degrade rhodamine B.
机译：通过无表面活性剂或矿物质的含水悬浮液的水热处理，合成了用纳米片自组装的分层花样的纳米结构纳米结构，通过无表面活性剂或矿物质的含水悬浮液的水热处理合成。通过X射线衍射，现场排放扫描电子显微镜，透射电子显微镜（TEM），高分辨率TEM，选定区域电子衍射和氮吸附 - 解吸等温线以X射线衍射，现场排放扫描电子显微镜，透射电子显微镜（选定区域电子衍射和氮气吸附 - 解吸等温线。为了了解等级花样的Bi2WO6介体纳米结构的形成机制，进行了一系列时间依赖性实验。通常，亚硝酸铋溶解度较高溶解度对（010）平面表面的核细分和亚核基团的核细分和吸附与（010）平面的组合，导致厚度和横向的原发性Bi2WO6纳米晶片尺寸。为了使系统能量进一步减少，形成的Bi2wo6纳米胸部自组装成分层花样的Bi2wo6介体纳米结构。此外，通过UV-Vis吸收研究了等级花样的花样的Bi2wo6介体纳米结构的带隙和光催化活性，并将其用作光催化剂降解罗丹明B.

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  • 来源
    《CrystEngComm》 |2019年第41期|共8页
  • 作者

    Jiang Wan; Huangfu Tongshuai; Yang Xin; Bao Liang; Liu Yong; Xu Gang; Han Gaorong;

  • 作者单位

    Zhejiang Univ State Key Lab Silicon Mat Hangzhou 310027 Zhejiang Peoples R China;

    Zhejiang Univ State Key Lab Silicon Mat Hangzhou 310027 Zhejiang Peoples R China;

    Zhejiang Univ State Key Lab Silicon Mat Hangzhou 310027 Zhejiang Peoples R China;

    Zhejiang Univ State Key Lab Silicon Mat Hangzhou 310027 Zhejiang Peoples R China;

    Zhejiang Univ State Key Lab Silicon Mat Hangzhou 310027 Zhejiang Peoples R China;

    Zhejiang Univ State Key Lab Silicon Mat Hangzhou 310027 Zhejiang Peoples R China;

    Zhejiang Univ State Key Lab Silicon Mat Hangzhou 310027 Zhejiang Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学工业;晶体学;
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