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首页> 美国卫生研究院文献>Nanomaterials >Joining Caffeic Acid and Hydrothermal Treatment to Produce Environmentally Benign Highly Reduced Graphene Oxide
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Joining Caffeic Acid and Hydrothermal Treatment to Produce Environmentally Benign Highly Reduced Graphene Oxide

机译：加入咖啡酸和水热处理生产环境良性高度减少的石墨烯氧化物

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Reduced graphene oxide (rGO) is a promising graphene-based material, with transversal applicability to a wide range of technological fields. Nevertheless, the common use of efficient—but hazardous to environment and toxic—reducing agents prevents its application in biological and other fields. Consequently, the development of green reducing strategies is a requirement to overcome this issue. Herein, a green, simple, and cost-effective one-step reduction methodology is presented. Graphene oxide (GO) was hydrothermally reduced in the presence of caffeic acid (CA), a natural occurring phenolic compound. The improvement of the hydrothermal reduction through the presence of CA is confirmed by XRD, Raman, XPS and TGA analysis. Moreover, CA polymerizes under hydrothermal conditions with the formation of spherical and non-spherical carbon particles, which can be useful for further rGO functionalization. FTIR and XPS confirm the oxygen removal in the reduced samples. The high-resolution scanning transmission electron microscopy (HRSTEM) images also support the reduction, showing rGO samples with an ordered graphitic layered structure. The promising rGO synthesized by this eco-friendly methodology can be explored for many applications.
机译：将石墨烯（RGO）的还原是一种基于石墨烯的材料，具有横向适用于各种技术领域。然而，常见的有效但危险的环境和毒性还原剂可防止其在生物和其他领域的应用。因此，绿色减少策略的发展是克服这个问题的要求。这里，提出了一种绿色，简单，具有成本效益的一步减少方法。石墨烯氧化物（GO）在咖啡酸（CA）的存在下，是一种天然存在的酚醛化合物。通过XRD，拉曼，XPS和TGA分析证实了通过Ca的存在的水热量降低的改善。此外，Ca在水热条件下聚合，形成球形和非球形碳颗粒，这可用于进一步的RGO官能化。 FTIR和XPS确认降低样品中的含氧。高分辨率扫描透射电子显微镜（HRSEM）图像也支持减少，显示具有有序的石墨层状结构的RGO样本。通过这种环保方法合成的有前途的RGO可以探索许多应用程序。

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