Characterization of carbon cryogels synthesized by sol-gel polycondensation
Apstrakt
Resorcinol-formaldehyde (RF) cryogels were synthesized by the sol-gel polycondensation of resorcinol (R) with formaldehyde (F) 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 the carbon cryogels were micro and mesoporous materials with high specific surface areas (S-BET approximate to 550 m(2)/g). Cyclic voltammetry experiments at various scan rates (2 to 200 mV s(-1)) were 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 sub-divide the total specific capacitance into the mesoporous and the microporous specific capacitance by analyzing the linear dependence of the charge (q) on the reciprocal of the square root of the potential scan rate (v(-1/2)), and the linear dependence of the reciprocal charge (l/q) on the square root of the potentia...l scan rate (v(-1/2)). The specific capacitance was found to be constant over a wide range of sample weight (12.5 to 50.0 mug) and a very promising specific capacitance value of 150 F/g, was found for this material operating in an acidic 0.5 mol dm(-3) HClO4 solution at room temperature.
Ključne reči:
carbon cryogel / carbonization / porosity / BET specific surface area / cyclic voltammetry / impedance / specific capacitanceIzvor:
Journal of the Serbian Chemical Society, 2005, 70, 1, 21-31
DOI: 10.2298/JSC0501021B
ISSN: 0352-5139
WoS: 000227363300003
Scopus: 2-s2.0-31544472867
Kolekcije
Institucija/grupa
VinčaTY - JOUR AU - Babić, Biljana M. AU - Đokić, Divna Đ. AU - Krstajic, N PY - 2005 UR - https://vinar.vin.bg.ac.rs/handle/123456789/2862 AB - Resorcinol-formaldehyde (RF) cryogels were synthesized by the sol-gel polycondensation of resorcinol (R) with formaldehyde (F) 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 the carbon cryogels were micro and mesoporous materials with high specific surface areas (S-BET approximate to 550 m(2)/g). Cyclic voltammetry experiments at various scan rates (2 to 200 mV s(-1)) were 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 sub-divide the total specific capacitance into the mesoporous and the microporous specific capacitance by analyzing the linear dependence of the charge (q) on the reciprocal of the square root of the potential scan rate (v(-1/2)), and the linear dependence of the reciprocal charge (l/q) on the square root of the potential scan rate (v(-1/2)). The specific capacitance was found to be constant over a wide range of sample weight (12.5 to 50.0 mug) and a very promising specific capacitance value of 150 F/g, was found for this material operating in an acidic 0.5 mol dm(-3) HClO4 solution at room temperature. T2 - Journal of the Serbian Chemical Society T1 - Characterization of carbon cryogels synthesized by sol-gel polycondensation VL - 70 IS - 1 SP - 21 EP - 31 DO - 10.2298/JSC0501021B ER -
@article{ author = "Babić, Biljana M. and Đokić, Divna Đ. and Krstajic, N", year = "2005", abstract = "Resorcinol-formaldehyde (RF) cryogels were synthesized by the sol-gel polycondensation of resorcinol (R) with formaldehyde (F) 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 the carbon cryogels were micro and mesoporous materials with high specific surface areas (S-BET approximate to 550 m(2)/g). Cyclic voltammetry experiments at various scan rates (2 to 200 mV s(-1)) were 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 sub-divide the total specific capacitance into the mesoporous and the microporous specific capacitance by analyzing the linear dependence of the charge (q) on the reciprocal of the square root of the potential scan rate (v(-1/2)), and the linear dependence of the reciprocal charge (l/q) on the square root of the potential scan rate (v(-1/2)). The specific capacitance was found to be constant over a wide range of sample weight (12.5 to 50.0 mug) and a very promising specific capacitance value of 150 F/g, was found for this material operating in an acidic 0.5 mol dm(-3) HClO4 solution at room temperature.", journal = "Journal of the Serbian Chemical Society", title = "Characterization of carbon cryogels synthesized by sol-gel polycondensation", volume = "70", number = "1", pages = "21-31", doi = "10.2298/JSC0501021B" }
Babić, B. M., Đokić, D. Đ.,& Krstajic, N.. (2005). Characterization of carbon cryogels synthesized by sol-gel polycondensation. in Journal of the Serbian Chemical Society, 70(1), 21-31. https://doi.org/10.2298/JSC0501021B
Babić BM, Đokić DĐ, Krstajic N. Characterization of carbon cryogels synthesized by sol-gel polycondensation. in Journal of the Serbian Chemical Society. 2005;70(1):21-31. doi:10.2298/JSC0501021B .
Babić, Biljana M., Đokić, Divna Đ., Krstajic, N, "Characterization of carbon cryogels synthesized by sol-gel polycondensation" in Journal of the Serbian Chemical Society, 70, no. 1 (2005):21-31, https://doi.org/10.2298/JSC0501021B . .