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首页> 外文期刊>Journal of nano research >Synthesis and Photocatalytic Activities of Bamboo-Like FeVO4 Nanocrystalline
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Synthesis and Photocatalytic Activities of Bamboo-Like FeVO4 Nanocrystalline

机译：竹状FeVO4纳米晶的合成及光催化活性

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摘要

The bamboo-like FeVO4 nanocrystallines were synthesized by a two-step method of the microwave hydrothermal-calcination, using Fe(NO3)(3)center dot 9H(2)O and NH4VO3 as raw materials. The physical and photophysical properties of the as-prepared photocatalysts were fully characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), UV-vis diffuse reflectance spectra and photoluminescence (PL) analysis. The photocatalytic activities were evaluated by the decolorization of RhB solution under UV and visible light irradiation. The results reveal that the precursor solution concentration is 0.15 mol/L, the molar ratio n(Fe)(V) is 1, pH=3.0. The microwave hydrothermal reaction is at 180 degrees C for 120 min and then calcinated under 550 degrees C for 3 h so as to obtain the triclinic FeVO4 nanocrystalline. Along [120] and [110], the fore and aft phases of the crystal orientation are bonded self-assembly to grow into the bamboo-like nanocrystalline with the energy gap of 2.42 eV. Under the UV-light irradiation for 240 min, the degradation rate of RhB is up to 91.2%. Adding 0.1 mL H2O2 to the solution, the out-phase photo-fenton reaction occurs and the degradation rate to RhB can reach to 98.8% after 8 h visible-light irradiation.
机译：以Fe（NO3）（3）中心点9H（2）O和NH4VO3为原料，通过微波水热煅烧两步法合成了竹样FeVO4纳米晶。通过X射线衍射（XRD），场发射扫描电子显微镜（FE-SEM），紫外可见漫反射光谱和光致发光（PL）分析充分表征了所制备光催化剂的物理和光物理性质。通过在紫外线和可见光照射下RhB溶液的脱色评价光催化活性。结果表明，前体溶液浓度为0.15mol / L，摩尔比n（Fe）/ n（V）为1，pH ＝ 3.0。微波水热反应在180摄氏度下进行120分钟，然后在550摄氏度下煅烧3小时，从而获得三斜晶型的FeVO4纳米晶。沿着[120]和[110]，晶体取向的前相和后相自组装成键，生长成具有2.42 eV的能隙的竹状纳米晶体。在紫外光照射240分钟后，RhB的降解率高达91.2％。在溶液中加入0.1 mL H2O2，发生了异相光芬顿反应，可见光照射8 h对RhB的降解率达到98.8％。

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  • 来源
    《Journal of nano research》 |2017年第2017期|123-134|共12页
  • 作者

    Tan Guoqiang; Xu Chi; Ren Huijun; Yang Wei; Zhao Chengcheng; Xia Ao;

  • 作者单位

    Shaanxi Univ Sci Technol, Sch Mat Sci & Engn, Xian 710021, Shaanxi, Peoples R China;

    Shaanxi Univ Sci Technol, Sch Mat Sci & Engn, Xian 710021, Shaanxi, Peoples R China;

    Shaanxi Univ Sci Technol, Sch Mat Sci & Engn, Xian 710021, Shaanxi, Peoples R China;

    Shaanxi Univ Sci Technol, Sch Mat Sci & Engn, Xian 710021, Shaanxi, Peoples R China;

    Shaanxi Univ Sci Technol, Sch Mat Sci & Engn, Xian 710021, Shaanxi, Peoples R China;

    Shaanxi Univ Sci Technol, Sch Mat Sci & Engn, Xian 710021, Shaanxi, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    FeVO4; nanocrystalline; microwave hydrothermal-calcination; bamboo-like; photocatalysis;

    机译：FeVO4;纳米晶;微波水热煅烧;竹节状;光催化;

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