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Graphene/TiO2 hybrid layer for simultaneous detection and degradation by a one-step transfer and integration method

机译：石墨烯/ TiO2混合层，用于通过一步转录和集成方法同时检测和降解

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摘要

During the past decades, researchers have made great efforts towards an ideal surface enhanced Raman spectroscopy (SERS) substrate. Here a smart SERS-active flexible substrate was designed and its performance was studied. The substrate is constructed from graphene and TiO2, and could be divided into two functional layers. Graphene provides a flat hot surface for Raman enhancement, which could be ascribed to chemical enhancement. The TiO2 layer is an effective photocatalyst, which could induce photocatalytic decomposition of adsorbed molecules under UV irradiation. Notably, the substrate was realized by a one-step transfer method, followed by annealing. In the synthesis process, a flexible TiO2 layer was produced by spin-coating on the CVD graphene and was used as a support in the transfer process of graphene instead of PMMA, which could exclude contamination and avoid degradation of the Raman enhancement performance. Combining detection with degradation of trace amounts of analyte, the versatility of the SERS substrate is greatly enhanced and could be adapted to fit a wide range of sensing and photocatalytic applications.
机译：在过去的几十年中，研究人员对理想的表面增强拉曼光谱（SERS）基板进行了巨大努力。这里设计了一个智能SERS-有源柔性基板，并研究了其性能。基板由石墨烯和TiO 2构成，并且可以分成两个功能层。石墨烯为拉曼增强提供了一个平坦的热表面，可以归因于化学增强。 TiO2层是有效的光催化剂，其可以在UV照射下诱导吸附分子的光催化分解。值得注意的是，通过一步转移方法实现基板，然后是退火。在合成过程中，通过在CVD石墨烯上通过旋涂制备柔性TiO 2层，并用作石墨烯代替PMMA的转移过程中的载体，这可能排除污染并避免拉曼增强性能的降低。结合痕量分析物的劣化的检测，梭子衬底的多功能性大大提高，并且可以适于适合宽范围的感测和光催化应用。

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  • 来源
    《RSC Advances》 |2017年第25期|共7页
  • 作者

    Yu Xinxin; Cai Ranran; Song Yuqing; Gao Qiang; Pan Nan; Wu Mingzai; Wang Xiaoping;

  • 作者单位

    Anhui Univ Sch Phys &

    Mat Sci Hefei 230601 Peoples R China;

    Anhui Univ Sch Phys &

    Mat Sci Hefei 230601 Peoples R China;

    Univ Sci &

    Technol China Dept Phys Hefei 230026 Peoples R China;

    Anhui Univ Sch Phys &

    Mat Sci Hefei 230601 Peoples R China;

    Univ Sci &

    Technol China Hefei Natl Lab Phys Sci Microscale Hefei 230026 Peoples R China;

    Anhui Univ Sch Phys &

    Mat Sci Hefei 230601 Peoples R China;

    Univ Sci &

    Technol China Hefei Natl Lab Phys Sci Microscale Hefei 230026 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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