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首页> 外文期刊>Applied Surface Science >The preparation of vanadium-doped TiO_2-montmorillonite nanocomposites and the photodegradation of sulforhodamine B under visible light irradiation
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The preparation of vanadium-doped TiO_2-montmorillonite nanocomposites and the photodegradation of sulforhodamine B under visible light irradiation

机译：钒掺杂TiO_2-蒙脱土纳米复合材料的制备及磺基若丹明B在可见光下的光降解

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摘要

The photodegradation of sulforhodamine B on vanadium-doped TiO_2-montmorillonite (TiO_2-MMT) nanocomposites was investigated under visible light irradiation. V-TiO_2-MMT nanocomposites with different amounts of MMT were prepared by a sol-gel process. The microstructure and properties of V-TiO_2-MMT were characterized by XRD, TEM, XPS, DRS, nitrogen adsorption isotherms, and FTIR. These analytic results indicated that the different Ti/MMT ratios exerted a great influence on their microstruc-tures and their photocatalytic activities. The average sizes of V-TiO_2-MMT were smaller than those of pure TiO_2 and V-TiO_2. And the layered structure of MMT was completely destroyed in the V-TiO_2-MMT with the relatively high ratio of Ti/MMT (240,120, 80, 60mmol/g), but it retained the partial MMT layered structure and had an enlargement of some basal space of MMT in V-TiO_2-MMT with the relatively low ratio of Ti/MMT (30,24mmol/g). V-TiO_2-MMT/120 (120 denotes the ratio of Ti/MMT is 120 mmol/g. The names of other catalysts followed the same convention.) and V-TiO_2-MMT/30 had relatively higher photocatalytic activity in comparison to the others. Besides, in the preparation process, we selected V-TiO_2-MMT/120 using different washing media to examine the effect of washing medium on the photocatalytic activity. The result indicated that it was critical to choose a proper washing medium to obtain an optimal photocatalytic activity.
机译：研究了可见光照射下钒掺杂的TiO_2-蒙脱土（TiO_2-MMT）纳米复合材料上磺基若丹明B的光降解。通过溶胶-凝胶法制备了具有不同MMT量的V-TiO_2-MMT纳米复合材料。用XRD，TEM，XPS，DRS，氮吸附等温线和FTIR对V-TiO_2-MMT的微观结构和性能进行了表征。这些分析结果表明，不同的Ti / MMT比对它们的微观结构和光催化活性有很大的影响。 V-TiO_2-MMT的平均尺寸小于纯TiO_2和V-TiO_2的尺寸。 Ti / MMT比例较高（240,120,80,60mmol / g）的V-TiO_2-MMT中，MMT的层状结构被完全破坏，但保留了部分MMT的层状结构并扩大了一些基础Ti / MMT比相对较低（30.24mmol / g）的V-TiO_2-MMT中MMT的空间。 V-TiO_2-MMT / 120（120表示Ti / MMT的比例为120 mmol / g。其他催化剂的名称遵循相同的惯例。）和V-TiO_2-MMT / 30相比，其具有较高的光催化活性。其他。此外，在制备过程中，我们选用不同的洗涤介质选择了V-TiO_2-MMT / 120，以考察洗涤介质对光催化活性的影响。结果表明，选择合适的洗涤介质以获得最佳的光催化活性至关重要。

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  • 来源
    《Applied Surface Science》 |2011年第16期|p.7276-7285|共10页
  • 作者

    Ke Chen; Jingyi Li; Wenxi Wang; Yumin Zhang; Xiaojing Wang; Haiquan Su;

  • 作者单位

    College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, Inner Mongolia 010021, PR China;

    College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, Inner Mongolia 010021, PR China;

    College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, Inner Mongolia 010021, PR China;

    College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, Inner Mongolia 010021, PR China;

    College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, Inner Mongolia 010021, PR China;

    College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, Inner Mongolia 010021, PR China;

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  • 正文语种 eng
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  • 关键词

    titanium-dioxide; vanadium; montmorillonite; photocatalysis; sulforhodamine b;

    机译：二氧化钛;钒;蒙脱石;光催化;亚磺胺多巴胺b;

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