Structure and thermal properties of poly(ethylene oxide)-intercalated graphite oxide
Structure and thermal properties of poly(ethylene oxide)-intercalated graphite oxide
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DOI：
10.1016/s0008-6223(96)00123-6
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发表时间：
1997-01-01
期刊：
影响因子：
10.9
通讯作者：
Sugie, Y
中科院分区：
文献类型：
--
作者：
Matsuo, Y;Tahara, K;Sugie, Y
合成了具有两种不同c轴重复距离的聚环氧乙烷嵌层石墨氧化物（PEO-intercalated GOs），并对其进行了详细的表征。在不同温度下获得的两种不同I-c值的PEO插层氧化石墨烯样品的红外光谱和x射线衍射图表明，在这两种PEO插层氧化石墨烯样品中，插层的PEO都是间扭式构象。这意味着在I-c值较大的PEO嵌入的GO中，PEO在GO库中以双层之字形链的形式存在。通过DSC数据和不同温度下的原位x射线衍射测量发现，I-c值较小的PEO-插层氧化石墨烯在162℃左右分解为GO和PEO， I-c值较大的PEO-插层氧化石墨烯在185℃左右分解，同时碳骨架被破坏。含乙酸铜的peo插层氧化石墨烯热分解得到的产物是支撑在无定形碳基体上的铜或氧化铜细颗粒，具体取决于环境气氛。用Scherrer方程计算得到的CuO的细颗粒尺寸约为7 nm，与透射电镜观察结果吻合较好；Cu2O和Cu的细颗粒尺寸约为20 ~ 30 nm。版权所有爱思唯尔科学有限公司
Poly(ethylene oxide)-intercalated graphite oxides (PEO-intercalated GOs) with two different c-axis repeat distances have been synthesized and characterized in detail. IR spectra and X-ray diffraction patterns obtained at various temperatures of PEO-intercalated GO samples with two different I-c values suggest that the conformation of the intercalated PEO is gauche in both PEO-intercalated GO samples. This means that in PEO-intercalated GO with the larger I-c value, PEO exists as double layers of zigzag chains in a GO gallery. From the DSC data and in situ X-ray diffraction measurement at various temperatures, it was found that PEO-intercalated GO with the smaller I-c value decomposed into GO and PEO at around 162 degrees C and the decomposition of that with the larger I-c value occurred at around 185 degrees C, accompanied by the destruction of the carbon skeleton. The products obtained by the thermal decomposition of PEO-intercalated GO containing copper acetate are copper or copper oxide fine particles supported on an amorphous carbon matrix, depending on the ambient atmosphere. The sizes of the fine particles calculated using Scherrer's equation were about 7 nm for CuO, which is in good agreement with that observed by TEM, and about 20-30 nm for Cu2O and Cu. Copyright (C) 1997 Elsevier Science Ltd.