Abstract
Functionalized nanostructured carbons were obtained by template method using sucrose as carbon precursor and silica gel SG60 as structure directing agent. To introduce acid groups into carbon a different amount of phosphoric acid was added to sucrose (impregnation ratio 0-1) before filling the pores of silica gel. After carbonization at 800 °C silica template was removed by dissolution in HF. Carbons were characterized by SEM/EDX, nitrogen adsorption at 77 K and acid-base titration. Pore size distributions (PSD) indicated that carbons obtained at impregnation (IR) of 0-0.75 have pores with size less than 4 nm due to crack during carbonization and activating action of phosphoric acid. Templated pores with 5.1 nm are observed in all carbons. PSD significantly changed at IR = 1 showing additional large mesopores of 8.2 nm. Acid-base titration revealed very high concentration of acid surface groups (4.1-4.7 mmol/g), significant amount of which (46 ± 3%) belongs to phosphate groups (pK = 2.3 ± 0.1). Another surface groups are weak carboxylic (pK = 5.9 ± 0.3), lactone and/or enol (pK = 7.2 ± 0.2, pK = 8.8 ± 0.3) and phenol groups (pK = 10.5 ± 0.3). SEM showed smooth carbon surface up to impregnation ratio 0.5 and increasing roughness at higher amount of phosphoric acid.
| Original language | English |
|---|---|
| Pages (from-to) | 599-604 |
| Number of pages | 6 |
| Journal | Carbon |
| Volume | 49 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - Feb 2011 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Chemistry(all)
Cite this
One-pot preparation of functionalized nanostructured carbons. / Puziy, Alexander M.; Poddubnaya, Olga I.; Reinish, Catherine A.; Tsyba, Mykola M.; Mikhalovska, Luba I.; Mikhalovsky, Sergey V.
In: Carbon, Vol. 49, No. 2, 02.2011, p. 599-604.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - One-pot preparation of functionalized nanostructured carbons
AU - Puziy, Alexander M.
AU - Poddubnaya, Olga I.
AU - Reinish, Catherine A.
AU - Tsyba, Mykola M.
AU - Mikhalovska, Luba I.
AU - Mikhalovsky, Sergey V.
PY - 2011/2
Y1 - 2011/2
N2 - Functionalized nanostructured carbons were obtained by template method using sucrose as carbon precursor and silica gel SG60 as structure directing agent. To introduce acid groups into carbon a different amount of phosphoric acid was added to sucrose (impregnation ratio 0-1) before filling the pores of silica gel. After carbonization at 800 °C silica template was removed by dissolution in HF. Carbons were characterized by SEM/EDX, nitrogen adsorption at 77 K and acid-base titration. Pore size distributions (PSD) indicated that carbons obtained at impregnation (IR) of 0-0.75 have pores with size less than 4 nm due to crack during carbonization and activating action of phosphoric acid. Templated pores with 5.1 nm are observed in all carbons. PSD significantly changed at IR = 1 showing additional large mesopores of 8.2 nm. Acid-base titration revealed very high concentration of acid surface groups (4.1-4.7 mmol/g), significant amount of which (46 ± 3%) belongs to phosphate groups (pK = 2.3 ± 0.1). Another surface groups are weak carboxylic (pK = 5.9 ± 0.3), lactone and/or enol (pK = 7.2 ± 0.2, pK = 8.8 ± 0.3) and phenol groups (pK = 10.5 ± 0.3). SEM showed smooth carbon surface up to impregnation ratio 0.5 and increasing roughness at higher amount of phosphoric acid.
AB - Functionalized nanostructured carbons were obtained by template method using sucrose as carbon precursor and silica gel SG60 as structure directing agent. To introduce acid groups into carbon a different amount of phosphoric acid was added to sucrose (impregnation ratio 0-1) before filling the pores of silica gel. After carbonization at 800 °C silica template was removed by dissolution in HF. Carbons were characterized by SEM/EDX, nitrogen adsorption at 77 K and acid-base titration. Pore size distributions (PSD) indicated that carbons obtained at impregnation (IR) of 0-0.75 have pores with size less than 4 nm due to crack during carbonization and activating action of phosphoric acid. Templated pores with 5.1 nm are observed in all carbons. PSD significantly changed at IR = 1 showing additional large mesopores of 8.2 nm. Acid-base titration revealed very high concentration of acid surface groups (4.1-4.7 mmol/g), significant amount of which (46 ± 3%) belongs to phosphate groups (pK = 2.3 ± 0.1). Another surface groups are weak carboxylic (pK = 5.9 ± 0.3), lactone and/or enol (pK = 7.2 ± 0.2, pK = 8.8 ± 0.3) and phenol groups (pK = 10.5 ± 0.3). SEM showed smooth carbon surface up to impregnation ratio 0.5 and increasing roughness at higher amount of phosphoric acid.
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U2 - 10.1016/j.carbon.2010.10.002
DO - 10.1016/j.carbon.2010.10.002
M3 - Article
VL - 49
SP - 599
EP - 604
JO - Carbon
JF - Carbon
SN - 0008-6223
IS - 2
ER -