拉曼光谱
纳米金刚石
无定形碳
材料科学
碳纤维
无定形固体
微晶
化学工程
相(物质)
结晶学
化学
钻石
有机化学
复合材料
工程类
物理
冶金
光学
复合数
作者
Dominique Schüpfer,Felix Badaczewski,Jan Peilstöcker,Juan Manuel Guerra-Castro,Hwirim Shim,Saleh Firoozabadi,Andreas Beyer,Kerstin Volz,Volker Presser,Christian Heiliger,Bernd M. Smarsly,Peter J. Klar
出处
期刊:Carbon
[Elsevier]
日期:2021-02-01
卷期号:172: 214-227
被引量:41
标识
DOI:10.1016/j.carbon.2020.09.063
摘要
The preparation of carbons for technical applications is typically based on a treatment of a precursor, which is transformed into the carbon phase with the desired structural properties. During such treatment the material passes through several different structural stages, for example, starting from precursor molecules via an amorphous phase into crystalline-like phases. While the structure of non-graphitic and graphitic carbon has been well studied, the transformation stages from molecular to amorphous and non-graphitic carbon are still not fully understood. Disordered carbon often contains a mixture of sp3-, sp2-and sp1-hybridized bonds, whose analysis is difficult to interpret. We systematically address this issue by studying the transformation of purely sp3-hybridized carbons, that is, nanodiamond and adamantane, into sp2-hybridized non-graphitic and graphitic carbon. The precursor materials are thermally treated at different temperatures and the transformation stages are monitored. We employ Raman spectroscopy, WAXS and TEM to characterize the structural changes. We correlate the intensities and positions of the Raman bands with the lateral crystallite size La estimated by WAXS analysis. The behavior of the D and G Raman bands characteristic for sp2-type material formed by transforming the sp3-hybridized precursors into non-graphitic and graphitic carbon agrees well with that observed using sp2-structured precursors.
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