Journalartikel

Jahr der Veröffentlichung: 2021

Seiten: 214-227

Zeitschrift: Carbon

Bandnummer: 172

ISSN: 0008-6223

eISSN: 1873-3891

Open Access Status: Hybrid

DOI Link: https://doi.org/10.1016/j.carbon.2020.09.063

Verlag: Elsevier

Abstract: 
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-, sp(2)- and sp(1)-hybridized bonds, whose analysis is difficult to interpret. We systematically address this issue by studying the transformation of purely sp(3)-hybridized carbons, that is, nanodiamond and adamantane, into sp(2)-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 sp(2)-type material formed by transforming the sp(3)-hybridized precursors into non-graphitic and graphitic carbon agrees well with that observed using sp(2)-structured precursors. (C) 2020 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license.

Harvard-Zitierstil: Schüpfer, D., Badaczewski, F., Peilstöcker, J., Guerra-Castro, J., Shim, H., Firoozabadi, S., et al. (2021) Monitoring the thermally induced transition from sp(3)-hybridized into sp(2)-hybridized carbons, Carbon, 172, pp. 214-227. https://doi.org/10.1016/j.carbon.2020.09.063

APA-Zitierstil: Schüpfer, D., Badaczewski, F., Peilstöcker, J., Guerra-Castro, J., Shim, H., Firoozabadi, S., Beyer, A., Volz, K., Presser, V., Heiliger, C., Smarsly, B., & Klar, P. (2021). Monitoring the thermally induced transition from sp(3)-hybridized into sp(2)-hybridized carbons. Carbon. 172, 214-227. https://doi.org/10.1016/j.carbon.2020.09.063