不同改性Hummers法合成氧化石墨

Roksana Muzyka; Monika Kwoka; Lukasz Smedowski; Noel Díez; Grazyna Gryglewi

doi:10.1016/S1872-5805(17)60102-1

不同改性Hummers法合成氧化石墨

doi: 10.1016/S1872-5805(17)60102-1

1.
Institute for Chemical Processing of Coal, 41-803 Zabrze, Poland;
2.
Institute of Electronics, Silesian University of Technology, Gliwice 44-100, Poland;
3.
Department of Polymer and Carbonaceous Materials, Faculty of Chemistry, Wroclaw University of Technology, Wroclaw 50-344, Poland

详细信息

通讯作者:
Roksana Muzyka.E-mail:rmuzyka@ichpw.pl

中图分类号: TQ165
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- 文章访问数: 847
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- 被引次数: 0
出版历程
- 收稿日期: 2016-10-09
- 录用日期: 2017-02-25
- 修回日期: 2017-01-08
- 刊出日期: 2017-02-28

Oxidation of graphite by different modified Hummers methods

1.
Institute for Chemical Processing of Coal, 41-803 Zabrze, Poland;
2.
Institute of Electronics, Silesian University of Technology, Gliwice 44-100, Poland;
3.
Department of Polymer and Carbonaceous Materials, Faculty of Chemistry, Wroclaw University of Technology, Wroclaw 50-344, Poland

摘要

摘要: 通过不同的Hummers法和重铬酸钠氧化法，以商业石墨为原料，合成出不同氧含量和官能团的氧化石墨。采用元素分析、FTIR、XPS、SEM和XRD对氧化石墨进行化学和结构表征。重铬酸钾氧化能得到一种氧含量低的氧化石墨，主要形成羟基和环氧基。Hummers法是更有效的一种氧化方法。使用NaNO₃氧化2 h，得到的氧化石墨具有最高的氧含量（>40 wt%），形成C-O和C=O键。SEM和XRD结果表明，在这些条件中，Hummers法合成的氧化石墨的石墨层间距最大。因此，用相同的氧化方法，通过改变反应条件能调控氧化石墨的化学结构。
- 石墨 /
- 改性Hummers法 /
- 氧化石墨 /
- 结构
Abstract: Graphite oxides with different oxygen contents and specifications were prepared from a commercial graphite by different versions of the Hummers method and by oxidation with sodium dichromate. The chemical and structural characteristics of the graphite oxides were studied by elemental analysis(EA), Fourier-transform infrared spectroscopy(FT-IR), X-ray photoelectron spectroscopy(XPS), scanning electron microscopy (SEM) and X-ray diffraction (XRD). Dichromate oxidation provided a low oxygen fixation, mainly in the form of hydroxyl and epoxy groups. A much more efficient oxidation was achieved by using the Hummers method. The use of NaNO₃ and a reaction time of 2 h led to the highest oxygen content in the graphite oxide, over 40 wt%, and oxygen was found to be single- and double-bonded to carbon. SEM and XRD observations showed a high spacing of the graphitic layers under these conditions. These results prove that, even using the same oxidizing method, the chemical structure of graphite oxides can be tailored by changing reaction conditions.
- Graphite /
- Modified Hummers methods /
- Graphite oxide /
- Structure

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