Diamond-Like Carbon Nanofoam from Low-Temperature Hydrothermal Carbonization of a Sucrose/Naphthalene Precursor Solution

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Amanda Bowers¹  Klaus Sattler¹  Shelby Taylor Mitchell¹  Natalie Frese²  Armin Gölzhäuser² 

[1] Department of Physics and Astronomy, University of Hawaii, 2505 Correa Road, Honolulu, HI 96822, USA;Faculty of Physics, University of Bielefeld, D-33501 Bielefeld, Germany;

关键词: carbon;    nanomaterials;    nanofoam;    nanostructured;    porous;    ultralight materials;    hydrothermal carbonization;   

DOI  :  10.3390/c3030023

来源: DOAJ

【 摘 要 】

Unusual structure of low-density carbon nanofoam, different from the commonly observed micropearl morphology, was obtained by hydrothermal carbonization (HTC) of a sucrose solution where a specific small amount of naphthalene had been added. Helium-ion microscopy (HIM) was used to obtain images of the foam yielding micron-sized, but non-spherical particles as structural units with a smooth foam surface. Raman spectroscopy shows a predominant sp2 peak, which results from the graphitic internal structure. A strong sp3 peak is seen in X-ray photoelectron spectroscopy (XPS). Electrons in XPS are emitted from the near surface region which implies that the graphitic microparticles have a diamond-like foam surface layer. The occurrence of separated sp2 and sp3 regions is uncommon for carbon nanofoams and reveals an interesting bulk-surface structure of the compositional units.

【 授权许可】

Unknown