Novel carbon nanomaterials such as reduced graphene oxide (rGO) and graphene oxide (GO) can be easily incorporated into the undergraduate curriculum to discuss basic chemistry and nanotechnology concepts. This paper describes a laboratory experiment designed to study the differences between GO and rGO regarding their physicochemical properties (e.g., color, hydrophobicity, type of functional groups, electrical conductivity, etc.). In this course, students carry out the chemical reduction of GO using ascorbic acid, a mild and environmentally friendly reducing agent. The differences between GO and rGO can be spotted by the naked eye and can be further evaluated by spectroscopic methods, as Fourier transform infrared and UV–vis spectroscopy and X-ray diffraction. Simple and applicable in all laboratories, use of the multimeter to measure resistance was proposed to reveal the different electrical properties of GO and rGO. Moreover, the proposed laboratory experiment is an ideal pretext to discuss the definition of graphene in the context of the overuse of this term in the literature.

中文翻译：

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还原氧化石墨烯与氧化石墨烯一起向大学生讲授核心化学和纳米技术概念

诸如还原氧化石墨烯（rGO）和氧化石墨烯（GO）之类的新型碳纳米材料可以轻松地纳入本科课程，以讨论基本的化学和纳米技术概念。本文描述了一个旨在研究GO和rGO在理化特性（例如颜色，疏水性，官能团类型，电导率等）方面的差异的实验室实验。在本课程中，学生将使用抗坏血酸（一种温和且环保的还原剂）对GO进行化学还原。GO和rGO之间的差异可以通过肉眼观察到，并且可以通过光谱方法进行进一步评估，例如傅立叶变换红外和紫外可见光谱以及X射线衍射。简单且适用于所有实验室，建议使用万用表测量电阻，以揭示GO和rGO的不同电性能。此外，在文献中过度使用该术语的背景下，提出的实验室实验是讨论石墨烯定义的理想借口。