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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/ TiO 2 杂化层，通过一步转移和积分方法同时检测和降解

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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，研究人员为实现理想的表面增强拉曼光谱（SERS）基板付出了巨大的努力。在这里设计了一种智能的SERS活性柔性基板，并对其性能进行了研究。基底由石墨烯和TiO 2 构成，可分为两个功能层。石墨烯为拉曼增强提供了平坦的热表面，这可以归因于化学增强。 TiO 2 层是一种有效的光催化剂，可以在紫外线照射下诱导吸附分子的光催化分解。值得注意的是，衬底是通过一步转移的方法实现的，然后进行退火。在合成过程中，通过在CVD石墨烯上旋涂制备了柔性TiO 2 层，并将其用作石墨烯的转移过程中的载体，代替了PMMA，这可以排除污染并避免拉曼增强性能下降。将检测与痕量分析物的降解相结合，可以大大增强SERS底物的多功能性，并且可以适应各种传感和光催化应用。

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