Journal Article

PHPPUBDB-9962

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Spherical porous carbon particles derived from suspensions and sediments of resorcinol-formaldehyde particles

Scherdel, C. (Corresponding author)Extern* ; Scherb, T. ; Reichenauer, G. ; DESY

2009
Elsevier Science Amsterdam [u.a.]

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Please use a persistent id in citations: doi:10.1016/j.carbon.2009.04.015

Abstract: The goal of this study is the completion of the parameter field of resorcinol–formaldehyde solutions towards the regime of non-monolithic phases. For low sodium carbonate concentration and low mass content of resorcinol and formaldehyde in the starting solution the formation of spherical particles rather than monolithic gels is observed. The organic precursors were converted into carbon powders by pyrolysis. The resulting carbon particles were characterized by scanning electron microscopy (SEM), nitrogen sorption and small-angle X-ray scattering (SAXS). The study shows that carbonization of the organic particles results in spherical carbon particles with a micropore volume of about 0.28 cm3/g. The composition of the starting solution, however, strongly affects the external surface area as determined from sorption data for the organic as well as for the corresponding carbon particles; the values derived can be converted into average diameters of spherical particles ranging from 30 nm to 5 μm. Complementary SEM and SAXS measurements confirm these findings. A diameter of 5 μm appears to be the upper size limit in particle size forming, while 30 nm spheres develop near the formation of a continuous gel at relatively high sodium carbonate concentrations.

Note: © Elsevier Ltd. ; Post referee fulltext in progress 2; Embargo 12 months from publication

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Contributing Institute(s):

1. Experiments with synchrotron radiation (HASYLAB(-2012))

Research Program(s):

1. DORIS Beamline BW4 (POF1-550) (POF1-550)
2. DORIS Beamline B1 (POF1-550) (POF1-550)
3. FS-Proposal: II-20052060 (II-20052060) (II-20052060)

Experiment(s):

1. DORIS Beamline BW4 (DORIS III)
2. DORIS Beamline B1 (DORIS III)

Appears in the scientific report 2009
Notes: (c) Elsevier. No copyright permission for full text.

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Database coverage:
; JCR ; No Author Disambiguation ; No Authors Fulltext ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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