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Characterization of carbon cryogel synthesized by sol-gel polycondensation and freeze-drying

Нема приказа
Аутори
Babić, Biljana M.
Kaluđerović, Branka V.
Vracar, L
Krstajic, N
Чланак у часопису
Метаподаци
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Апстракт
Resorcinol-formaldehyde (RF) cryogels were synthesized by sol-gel polycondensation of resorcinol with formaldehyde and freeze-drying was carried out with t-butanol. Carbon cryogels were obtained by pyrolyzing RF cryogels in an inert atmosphere. Characterization by nitrogen adsorption showed that carbon cryogels were micro and mesoporous materials with high surface areas (500 m(2)/g LT S-BET LT 750 m(2)/g). Cyclic voltammetry experiments at various scan rates (2-200 mV s(-1)) have been performed to study the electrical double-layer charging of carbon cryogel electrodes in 0.5 mol dm(-3) HClO4 solution. It has been demonstrated that it is possible to divide further total specific capacitance into mesoporous and microporous specific capacitance by analyzing the linear dependence of the specific capacitance (C) on the reciprocal of the square root of the potential scan rate (v(-1/2)), and linear dependence of the reciprocal specific charge (1/C) on the square root of the potential scan rat...e (v(1/2)). (C) 2004 Elsevier Ltd. All rights reserved.

Кључне речи:
porous carbon / carbonization / BET surface area / electrochemical properties / porosity
Извор:
Carbon, 2004, 42, 12-13, 2617-2624

DOI: 10.1016/j.carbon.2004.05.046

ISSN: 0008-6223 (print)

WoS: 000223753200032

Scopus: 2-s2.0-4043123944
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URI
http://vinar.vin.bg.ac.rs/123456789/2801
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