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Synthesis, characterization and application of TiO2/Ag recyclable SERS substrates

机译:TiO 2 / Ag可回收SERS基质的合成,表征和应用

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In this paper, rutile and anatase TiO2/Ag nanocomposites were prepared by a facile and green photochemical method. The as-prepared samples were investigated by using various spectroscopic and microscopic techniques in detail. Trace detection of rhodamine 6G (R6G) and crystal violet (CV) was studied based on the nanocomposites. Compared to the anatase TiO2/Ag nanocomposite, the rutile TiO2/Ag nanocomposites (Sr3) exhibited the best SERS performance for rhodamine 6G (R6G). Then, the optimized SERS-active substrates (Sr3) were employed to study its recycling properties by degrading R6G and CV in situ. The substrates were able to self-clean. The possible mechanism of the good SERS and photocatalytic performance of the TiO2/Ag nanocomposite (Sr3) was discussed. This work is of importance in theoretical research and practical application based on the SERS effect of nanocomposites.
机译:本文采用一种简便,绿色的光化学方法制备了金红石型和锐钛矿型TiO 2 / Ag纳米复合材料。通过使用各种光谱学和显微镜技术详细研究了所制备的样品。基于纳米复合材料,研究了若丹明6G(R6G)和结晶紫(CV)的痕量检测。与锐钛矿型TiO 2 / Ag纳米复合材料相比,金红石型TiO 2 / Ag纳米复合材料(S r3 )对罗丹明6G(R6G)表现出最佳的SERS性能。然后,采用优化的SERS活性底物(S r3 ),通过原位降解R6G和CV 来研究其循环利用性能。基材能够自清洁。 TiO 2 / Ag纳米复合材料(S r3 )的良好SERS和光催化性能的可能机理为讨论过。这项工作对基于纳米复合材料的SERS效应的理论研究和实际应用具有重要意义。

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