Highly functionalized reduced graphene oxide (rGO) sheets, decorated with homogenously distributed titanium dioxide (TiO₂) nanoparticles, were obtained by optimizing the conditions of a facile solvothermal synthesis route with methanol‐water as solvent. These materials show a Raman enhancement apparently at the rGO/TiO₂ interface. Conventional and High Resolution Transmission Electron microscopy (HRTEM) and X‐ray diffraction (XRD) show single crystal TiO₂ NPs below 6 nm with an anatase crystalline phase. Fourier Transform Infrared (FT‐IR) spectroscopy shows a significant chemical reduction of the graphene oxide. Thermal analysis also confirms the efficient functionalization and in‐situ reduction of the graphene oxide sheets. The results show that under mild conditions, the solvent mixture achieves a higher functionalization than pure solvents.

中文翻译：

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溶剂热合成还原氧化石墨烯/二氧化钛纳米复合材料的增强拉曼效应

通过优化以甲醇-水为溶剂的便捷溶剂热合成路线的条件，获得了装饰有均相分布的二氧化钛（TiO ₂）纳米粒子的高功能化氧化石墨烯（rGO）片材。这些材料在rGO / TiO ₂界面上明显显示出拉曼增强。常规和高分辨率透射电子显微镜（HRTEM）和X射线衍射（XRD）显示单晶TiO ₂NP低于6 nm，具有锐钛矿晶相。傅立叶变换红外（FT-IR）光谱显示氧化石墨烯的化学还原作用显着。热分析还证实了氧化石墨烯片的有效功能化和原位还原。结果表明，在温和条件下，溶剂混合物比纯溶剂具有更高的官能度。