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首页> 外文期刊>Journal of Hazardous Materials >Enhanced photoelectrocatalytic activity for dye degradation by graphene-titania composite film electrodes
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Enhanced photoelectrocatalytic activity for dye degradation by graphene-titania composite film electrodes

机译：增强的石墨烯-二氧化钛复合膜电极降解染料的光电催化活性

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摘要

Graphene-titania composite film electrodes have been fabricated by a dip-coating method. Transmission electron microscopy (TEM) images show that the titania nanoparticles were dispersed uniformly, with only a little aggregation on the surface and edges of the graphene sheets. XRD analysis showed that the composite electrodes comprised the anatase phase of titania with just a little rutile phase. The photoelectrocatalytic activities of the as-prepared samples were investigated by studies of the degradation of Reactive Brilliant Red dye X-3B (C.I. reactive red 2). An enhancement of the photocurrents was observed using the graphene-titania composite electrodes, compared with pure titania film electrodes, under UV light irradiation. This improvement is attributed to the following two reasons: enhanced migration efficiency of the photo-induced electrons and enhanced adsorption activity of the dye molecules. In addition, we investigated the effects of graphene content and pH values on the photoelectrocatalytic activity of the as-prepared composite film electrodes. Results showed that there was an optimal amount of 5% (initial graphite oxide content).
机译：石墨烯-二氧化钛复合膜电极已经通过浸涂法制造。透射电子显微镜（TEM）图像显示二氧化钛纳米颗粒均匀分散，在石墨烯片的表面和边缘仅有很少的聚集。 XRD分析表明，复合电极包括二氧化钛的锐钛矿相和金红石相。通过研究活性艳红染料X-3B（C.I。活性红2）的降解，研究了所制备样品的光电催化活性。与纯二氧化钛膜电极相比，使用石墨烯-二氧化钛复合电极在紫外光照射下观察到光电流增强。该改善归因于以下两个原因：光致电子的迁移效率提高和染料分子的吸附活性提高。此外，我们研究了石墨烯含量和pH值对制备的复合膜电极的光电催化活性的影响。结果显示最佳量为5％（初始氧化石墨含量）。

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  • 来源
    《Journal of Hazardous Materials》 |2012年第15期|p.79-83|共5页
  • 作者

    Peifang Wang; Yanhui Ao; Chao Wang; Jun Hou; Jin Qian;

  • 作者单位

    Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing 2W098, China;

    Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing 2W098, China;

    Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing 2W098, China;

    Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing 2W098, China;

    Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing 2W098, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    graphene; photo-electrocatalysis; titania; composite film electrode;

    机译：石墨烯光电催化;二氧化钛复合膜电极;

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