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首页> 外文期刊>Journal of nano research >Effect of Pd Addition on the Nanostructure and Properties of Pd/TiO_2 Catalysts for the Photocatalytic Degradation of 4-chlorophenol
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Effect of Pd Addition on the Nanostructure and Properties of Pd/TiO_2 Catalysts for the Photocatalytic Degradation of 4-chlorophenol

机译：Pd的添加对Pd / TiO_2光催化降解4-氯苯酚的纳米结构和性能的影响

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摘要

In this work, the effect of Pd addition on nanostructuredTiO_2powders is studied. The materials were obtained by the sol-gel method and characterized by XRD, Rietveld refinement, TEM, Raman and UV-vis spectroscopies. The crystal structure and the nature of the differentTiO_2phases were modified by varying the palladium/TiO_2 ratio: 0.01, 0.03, and 0.05. The XRD results revealed the presence of different combinations of TiO_2 (B), anatase, rutile and PdO phases as well as their coexistence in the different samples. The Rietveld analysis showed that the composition of the phases is rather affected by the amount of Pd added to theTiO_2structure. The Raman spectroscopy confirmed the characteristic bands of the TiO_2 phases in the samples and their variation depending on the Pd/TiO_2 ratio. The TEM results indicated that the as-prepared samples displayed crystal sizes of nanometric order (＜ 80nm). The observed reduction of the band gap was also correlated with the combination of phases due to the palladium addition. All the Pd/TiO_2 samples showed a significant improvement in the elimination of 4-chlorophenol during the application of water treatment technology.
机译：在这项工作中，研究了钯的添加对纳米结构的TiO_2粉末的影响。该材料是通过溶胶-凝胶法获得的，并通过XRD，Rietveld精制，TEM，拉曼和紫外可见光谱进行表征。通过改变钯/ TiO 2的比值：0.01、0.03和0.05，可以改变不同TiO_2相的晶体结构和性质。 X射线衍射结果表明存在TiO_2（B），锐钛矿，金红石和PdO相的不同组合，以及它们在不同样品中的共存。 Rietveld分析表明，相的组成受添加到TiO_2结构中的Pd量的影响较大。拉曼光谱证实了样品中TiO_2相的特征带及其随Pd / TiO_2比的变化。 TEM结果表明，所制备的样品显示出纳米级的晶体尺寸（＜80nm）。所观察到的带隙减小也与由于钯添加而引起的相的组合有关。在水处理技术应用过程中，所有Pd / TiO_2样品在消除4-氯苯酚方面均显示出显着改善。

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  • 来源
    《Journal of nano research》 |2014年第2014期|9-20|共12页
  • 作者

    D.S. Garcia-Zaleta; J.A. Montes de Oca-Valero; A.M. Torres-Huerta; M.A. Dominguez-Crespo; H.J. Dorantes-Rosales; R. Lopez-Gonzalez; A. Garcia-Murillo;

  • 作者单位

    Instituto Politecnico Nacional, CICATA-Altamira, Km 14.5 Carr. Tampico-Pto. Ind. Altamira, Altamira, Tams. Mexico, 89600;

    Instituto Politecnico Nacional, CICATA-Altamira, Km 14.5 Carr. Tampico-Pto. Ind. Altamira, Altamira, Tams. Mexico, 89600;

    Instituto Politecnico Nacional, CICATA-Altamira, Km 14.5 Carr. Tampico-Pto. Ind. Altamira, Altamira, Tams. Mexico, 89600;

    Instituto Politecnico Nacional, CICATA-Altamira, Km 14.5 Carr. Tampico-Pto. Ind. Altamira, Altamira, Tams. Mexico, 89600;

    Instituto Politecnico Nacional. ESIQIE-Metalurgia, AP 118-430, Admon. GAM Mexico D.F. Mexico, 07051;

    Universidad Juarez Autonoma de Tabasco, Division Academica de Ingenieria y Arquitectura, Carr. Cunduacan-Jalpa KM. 1 Col. La Esmeralda CP., Cunduacan, Tabasco, Mexico, 86690;

    Instituto Politecnico Nacional, CIITEC, Cerrada de Cecati S/N. Col. Santa Catarina Azcapotzalco, Mexico D.F. Mexico, 02250;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    TiO_2; Pd/TiO_2; Nanoparticles; Rietveld analysis; Anatase; Rutile; photocalytic activity;

    机译：TiO_2;Pd / TiO_2;纳米颗粒;Rietveld分析;锐钛矿;金红石;光催化活性;

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