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Published in: Adsorption 2-4/2013

01-04-2013

Structural and surface heterogeneity of phosphorus-containing polyimide-derived carbons: effect of heat treatment temperature

Authors: A. M. Puziy, O. I. Poddubnaya, M. Sobiesiak, B. Gawdzik

Published in: Adsorption | Issue 2-4/2013

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Abstract

Phosphorus-containing carbons have been obtained by carbonization of porous copolymer of 4,4′-bis(maleimidodiphenyl)methane (50 mol%) and divinylbenzene (50 mol%) in presence of phosphoric acid at temperatures 400–1000 °C. Porous structure was analyzed by nitrogen adsorption isotherms while surface chemistry was investigated by potentiometric titration method. It has been shown that carbons obtained at 500–1000 °C are micro-mesoporous with pore sizes of 1–1.1, 2–3 and 5.4 nm. The most developed porosity was achieved at 600 °C reaching BET surface area 890 m2/g and total pore volume 0.45 cm3/g. Carbons obtained by carbonization of polyimide precursor in presence of phosphoric acid showed acidic character with 30–40 % of phosphate surface groups. Maximum total amount of acidic surface groups was achieved at 800 °C reaching 3.2 mmol/g. Assignment of strongly acidic surface groups to phosphates was corroborated by pK value, phosphorus content and thermal gravimetric analysis.

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Metadata
Title
Structural and surface heterogeneity of phosphorus-containing polyimide-derived carbons: effect of heat treatment temperature
Authors
A. M. Puziy
O. I. Poddubnaya
M. Sobiesiak
B. Gawdzik
Publication date
01-04-2013
Publisher
Springer US
Published in
Adsorption / Issue 2-4/2013
Print ISSN: 0929-5607
Electronic ISSN: 1572-8757
DOI
https://doi.org/10.1007/s10450-013-9497-4

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