A one-step, solvothermal reduction method for producing reduced graphene oxide dispersions in organic solvents.
A one-step, solvothermal reduction method for producing reduced graphene oxide dispersions in organic solvents.
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DOI：
10.1021/nn100511a
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发表时间：
2010-07-27
期刊：
影响因子：
17.1
通讯作者：
Kaner RB
中科院分区：
文献类型：
--
作者：
Dubin S;Gilje S;Wang K;Tung VC;Cha K;Hall AS;Farrar J;Varshneya R;Yang Y;Kaner RB
氧化石墨烯(GO)在N-甲基-2-吡咯烷酮(NMP)中回流会导致脱氧和还原，从而得到稳定的胶体分散体。溶剂热还原伴随着颜色从浅棕色变为黑色。产品的原子力显微镜(AFM)和扫描电子显微镜(SEM)图像证实了溶剂热还原氧化石墨烯(SRGO)的单层存在。X射线光电子能谱(XPS)分析表明，SRGO的C=C键强度显著增加，还原完成后氧含量显著降低。X射线衍射分析表明，在26.24°2θ(3.4o)处有一个单一的宽峰，证实了还原片层的石墨堆积的存在。SRGO薄膜可在各种有机溶剂中再分散，有望成为体相异质结光伏电池或电磁干扰屏蔽应用的受体材料。
Refluxing graphene oxide (GO) in N-methyl-2-pyrrolidinone (NMP) results in deoxygenation and reduction to yield a stable colloidal dispersion. The solvothermal reduction is accompanied by a color change from light brown to black. Atomic force microscopy (AFM) and scanning electron microscopy (SEM) images of the product confirm the presence of single sheets of the solvothermally reduced graphene oxide (SRGO). X-ray photoelectron spectroscopy (XPS) of SRGO indicates a significant increase in intensity of the C=C bond character, while the oxygen content decreases markedly after the reduction is complete. X-ray diffraction analysis of SRGO shows a single broad peak at 26.24° 2θ (3.4 Å), confirming the presence of graphitic stacking of reduced sheets. SRGO sheets are redispersible in a variety of organic solvents, which may hold promise as an acceptor material for bulk heterojunction photovoltaic cells, or electromagnetic interference shielding applications.
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