TY  - JOUR
AU  - Ciric-Marjanovic, Gordana
AU  - Mentus, Slavko
AU  - Pasti, Igor
AU  - Gavrilov, Nemanja
AU  - Krstić, Jugoslav
AU  - Travas-Sejdic, Jadranka
AU  - Strover, Lisa T.
AU  - Kopecka, Jitka
AU  - Moravkova, Zuzana
AU  - Trchova, Miroslava
AU  - Stejskal, Jaroslav
PY  - 2014
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1594
AB  - Polypyrrole nanotubes (PPy-NTs) were prepared by the oxidation of pyrrole with iron(III) chloride in the presence of a structure-guiding agent, methyl orange. Upon carbonization of the salt form of PPy-NTs, the conducting nitrogen-containing nanotubular carbonaceous material (C-PPy-NT) was obtained. The morphology, structure, and physicochemical properties of PPy-NTs in salt and base form as well as C-PPy-NTs were investigated by transmission electron microscopy, Fourier transform infrared and Raman spectroscopies, conductivity measurements, elemental microanalysis, inductively coupled plasma optical emission spectroscopy, X-ray photoelectron spectroscopy, and nitrogen physisorption. Results of the material characterization were linked to their electrochemical behavior. Specific capacitance of around 120 F g(-1) at low potential sweep rate of 5 mV s(-1) was observed for original PPy-NTs. However, when the potential sweep rate was increased to 100 mV s(-1), PPy-NT salt retained the value of specific capacitance, while the capacitance of PPy-NT base decreased by 70%. Upon carbonization of PPy-NT salt, the specific capacitance was doubled and capacitance fade measured in the interval 5-100 mV s(-1) was determined to be around 45%. It is proposed that the absolute value of specific capacitance is determined by specific surface area and surface functional groups, while the capacitance fade is determined by the conductivity of the electrode material. In this manner, a linear relationship between the percent of capacitance fade and the logarithm of the conductivity was revealed. C-PPy-NTs were also tested as an electrocatalyst for the oxygen reduction reaction (ORR) in alkaline media. High ORR activity was observed, characterized by the onset potential of -0.1 V versus saturated calomel electrode and the apparent number of electrons consumed per oxygen molecule higher than 3. Appreciable ORR activity can be linked with a high fraction of mesopores and the presence of surface functional groups, especially pyridinic and pyrrolic nitrogens, and also with a high degree of structural disorder.
PB  - American Chemical Society (ACS)
T2  - Journal of Physical Chemistry C
T1  - Synthesis, Characterization, and Electrochemistry of Nanotubular Polypyrrole and Polypyrrole-Derived Carbon Nanotubes
VL  - 118
IS  - 27
SP  - 14770
EP  - 14784
DO  - 10.1021/jp502862d
ER  - 

@article{
author = "Ciric-Marjanovic, Gordana and Mentus, Slavko and Pasti, Igor and Gavrilov, Nemanja and Krstić, Jugoslav and Travas-Sejdic, Jadranka and Strover, Lisa T. and Kopecka, Jitka and Moravkova, Zuzana and Trchova, Miroslava and Stejskal, Jaroslav",
year = "2014",
abstract = "Polypyrrole nanotubes (PPy-NTs) were prepared by the oxidation of pyrrole with iron(III) chloride in the presence of a structure-guiding agent, methyl orange. Upon carbonization of the salt form of PPy-NTs, the conducting nitrogen-containing nanotubular carbonaceous material (C-PPy-NT) was obtained. The morphology, structure, and physicochemical properties of PPy-NTs in salt and base form as well as C-PPy-NTs were investigated by transmission electron microscopy, Fourier transform infrared and Raman spectroscopies, conductivity measurements, elemental microanalysis, inductively coupled plasma optical emission spectroscopy, X-ray photoelectron spectroscopy, and nitrogen physisorption. Results of the material characterization were linked to their electrochemical behavior. Specific capacitance of around 120 F g(-1) at low potential sweep rate of 5 mV s(-1) was observed for original PPy-NTs. However, when the potential sweep rate was increased to 100 mV s(-1), PPy-NT salt retained the value of specific capacitance, while the capacitance of PPy-NT base decreased by 70%. Upon carbonization of PPy-NT salt, the specific capacitance was doubled and capacitance fade measured in the interval 5-100 mV s(-1) was determined to be around 45%. It is proposed that the absolute value of specific capacitance is determined by specific surface area and surface functional groups, while the capacitance fade is determined by the conductivity of the electrode material. In this manner, a linear relationship between the percent of capacitance fade and the logarithm of the conductivity was revealed. C-PPy-NTs were also tested as an electrocatalyst for the oxygen reduction reaction (ORR) in alkaline media. High ORR activity was observed, characterized by the onset potential of -0.1 V versus saturated calomel electrode and the apparent number of electrons consumed per oxygen molecule higher than 3. Appreciable ORR activity can be linked with a high fraction of mesopores and the presence of surface functional groups, especially pyridinic and pyrrolic nitrogens, and also with a high degree of structural disorder.",
publisher = "American Chemical Society (ACS)",
journal = "Journal of Physical Chemistry C",
title = "Synthesis, Characterization, and Electrochemistry of Nanotubular Polypyrrole and Polypyrrole-Derived Carbon Nanotubes",
volume = "118",
number = "27",
pages = "14770-14784",
doi = "10.1021/jp502862d"
}

Ciric-Marjanovic, G., Mentus, S., Pasti, I., Gavrilov, N., Krstić, J., Travas-Sejdic, J., Strover, L. T., Kopecka, J., Moravkova, Z., Trchova, M.,& Stejskal, J.. (2014). Synthesis, Characterization, and Electrochemistry of Nanotubular Polypyrrole and Polypyrrole-Derived Carbon Nanotubes. in Journal of Physical Chemistry C
American Chemical Society (ACS)., 118(27), 14770-14784.
https://doi.org/10.1021/jp502862d

Ciric-Marjanovic G, Mentus S, Pasti I, Gavrilov N, Krstić J, Travas-Sejdic J, Strover LT, Kopecka J, Moravkova Z, Trchova M, Stejskal J. Synthesis, Characterization, and Electrochemistry of Nanotubular Polypyrrole and Polypyrrole-Derived Carbon Nanotubes. in Journal of Physical Chemistry C. 2014;118(27):14770-14784.
doi:10.1021/jp502862d .

Ciric-Marjanovic, Gordana, Mentus, Slavko, Pasti, Igor, Gavrilov, Nemanja, Krstić, Jugoslav, Travas-Sejdic, Jadranka, Strover, Lisa T., Kopecka, Jitka, Moravkova, Zuzana, Trchova, Miroslava, Stejskal, Jaroslav, "Synthesis, Characterization, and Electrochemistry of Nanotubular Polypyrrole and Polypyrrole-Derived Carbon Nanotubes" in Journal of Physical Chemistry C, 118, no. 27 (2014):14770-14784,
https://doi.org/10.1021/jp502862d . .

TY  - JOUR
AU  - Milojević-Rakić, Maja
AU  - Janošević, Aleksandra
AU  - Krstić, Jugoslav
AU  - Nedić-Vasiljević, Bojana
AU  - Dondur, Vera
AU  - Ciric-Marjanovic, Gordana
PY  - 2013
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1188
AB  - Nanostructured and granular polyanilines (PANIs) and their composites with zeolite ZSM-5, synthesized by the oxidative polymerization of aniline in water and aqueous solution of sulfuric acid, are evaluated as adsorbents of the organic herbicide glyphosate [N-(phosphonomethyl)glycine] in aqueous solution. The protonated and deprotonated forms of synthesized materials were characterized by elemental and thermogravimetric analysis, scanning electron microscopy, FTIR, Raman and UV-Vis spectroscopies, X-ray powder diffraction, and nitrogen physisorption measurements. The adsorption isotherms of glyphosate on studied materials were best fitted by Freundlich and Langmuir-Freundlich models. The adsorption characteristics of the investigated PANIs and PANI/ZSM-5 composites were found to be much more influenced by the oxidation state and protonation level of PANI in the adsorbents then by the textural and morphological properties of materials. The highest adsorption of glyphosate among all investigated PANI and PANI/ZSM-5 samples, as well as pure ZSM-5, exhibited the deprotonated granular PANI which was synthesized in sulfuric acid medium (98.5 mg/g). High adsorption capacity also showed the deprotonated PANI/ZSM-5 composite with similar to 50% of zeolite (61.9 mg/g) and the protonated nanostructured PANI (59.9 mg/g), both materials prepared in water without added acid.
PB  - Elsevier
T2  - Microporous and Mesoporous Materials
T1  - Polyaniline and its composites with zeolite ZSM-5 for efficient removal of glyphosate from aqueous solution
VL  - 180
SP  - 141
EP  - 155
DO  - 10.1016/j.micromeso.2013.06.025
ER  - 

@article{
author = "Milojević-Rakić, Maja and Janošević, Aleksandra and Krstić, Jugoslav and Nedić-Vasiljević, Bojana and Dondur, Vera and Ciric-Marjanovic, Gordana",
year = "2013",
abstract = "Nanostructured and granular polyanilines (PANIs) and their composites with zeolite ZSM-5, synthesized by the oxidative polymerization of aniline in water and aqueous solution of sulfuric acid, are evaluated as adsorbents of the organic herbicide glyphosate [N-(phosphonomethyl)glycine] in aqueous solution. The protonated and deprotonated forms of synthesized materials were characterized by elemental and thermogravimetric analysis, scanning electron microscopy, FTIR, Raman and UV-Vis spectroscopies, X-ray powder diffraction, and nitrogen physisorption measurements. The adsorption isotherms of glyphosate on studied materials were best fitted by Freundlich and Langmuir-Freundlich models. The adsorption characteristics of the investigated PANIs and PANI/ZSM-5 composites were found to be much more influenced by the oxidation state and protonation level of PANI in the adsorbents then by the textural and morphological properties of materials. The highest adsorption of glyphosate among all investigated PANI and PANI/ZSM-5 samples, as well as pure ZSM-5, exhibited the deprotonated granular PANI which was synthesized in sulfuric acid medium (98.5 mg/g). High adsorption capacity also showed the deprotonated PANI/ZSM-5 composite with similar to 50% of zeolite (61.9 mg/g) and the protonated nanostructured PANI (59.9 mg/g), both materials prepared in water without added acid.",
publisher = "Elsevier",
journal = "Microporous and Mesoporous Materials",
title = "Polyaniline and its composites with zeolite ZSM-5 for efficient removal of glyphosate from aqueous solution",
volume = "180",
pages = "141-155",
doi = "10.1016/j.micromeso.2013.06.025"
}

Milojević-Rakić, M., Janošević, A., Krstić, J., Nedić-Vasiljević, B., Dondur, V.,& Ciric-Marjanovic, G.. (2013). Polyaniline and its composites with zeolite ZSM-5 for efficient removal of glyphosate from aqueous solution. in Microporous and Mesoporous Materials
Elsevier., 180, 141-155.
https://doi.org/10.1016/j.micromeso.2013.06.025

Milojević-Rakić M, Janošević A, Krstić J, Nedić-Vasiljević B, Dondur V, Ciric-Marjanovic G. Polyaniline and its composites with zeolite ZSM-5 for efficient removal of glyphosate from aqueous solution. in Microporous and Mesoporous Materials. 2013;180:141-155.
doi:10.1016/j.micromeso.2013.06.025 .

Milojević-Rakić, Maja, Janošević, Aleksandra, Krstić, Jugoslav, Nedić-Vasiljević, Bojana, Dondur, Vera, Ciric-Marjanovic, Gordana, "Polyaniline and its composites with zeolite ZSM-5 for efficient removal of glyphosate from aqueous solution" in Microporous and Mesoporous Materials, 180 (2013):141-155,
https://doi.org/10.1016/j.micromeso.2013.06.025 . .

TY  - JOUR
AU  - Vujković, Milica
AU  - Gavrilov, Nemanja
AU  - Pasti, Igor
AU  - Krstić, Jugoslav
AU  - Travas-Sejdic, Jadranka
AU  - Ciric-Marjanovic, Gordana
AU  - Mentus, Slavko
PY  - 2013
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1162
AB  - Carbonized nanostructured polyaniline (C.PANI) was hydrothermally treated in 1 mol dm(-3) KOH at 200 degrees C. The treatment caused significant reduction of micropore volume but negligible changes in mesoporous domain, as evidenced by nitrogen adsorption measurements, as well as significant increase of surface N/C and O/C ratios, as evidenced by XPS method. In comparison to the C.PANI precursor, the new material, denoted as C.PANI.HAT200, delivered twice as high gravimetric capacitances, amounting to 363, 220 and 432 F g(-1), in 6 mol dm(-3) KOH, 2 mol dm(-3) KNO3 and 1 mol dm(-3) H2SO4, respectively, when measured potentiodynamically at a scan rate of 5 mV s(-1). Moreover, its exceptionally high electrocatalytic activity towards the oxygen reduction reaction (ORR), almost one order of magnitude higher than that of C.PANI was evidenced in alkaline media, approaching closely a four-electron pathway. The onset potential for ORR matched the one of platinum-based electrocatalyst. Significant improvements of both capacitive and electrocatalytic properties of C.PANI.HAT200 were discussed in correlation to the modification of surface functional groups. These findings affirm the low temperature hydrothermal post-synthetic modification of N-doped nanocarbons as a route of production of advanced multifunctional carbon materials with exceptional characteristics.
PB  - Oxford : Pergamon-Elsevier Science Ltd
T2  - Carbon
T1  - Superior capacitive and electrocatalytic properties of carbonized nanostructured polyaniline upon a low-temperature hydrothermal treatment
VL  - 64
SP  - 472
EP  - 486
DO  - 10.1016/j.carbon.2013.07.100
ER  - 

@article{
author = "Vujković, Milica and Gavrilov, Nemanja and Pasti, Igor and Krstić, Jugoslav and Travas-Sejdic, Jadranka and Ciric-Marjanovic, Gordana and Mentus, Slavko",
year = "2013",
abstract = "Carbonized nanostructured polyaniline (C.PANI) was hydrothermally treated in 1 mol dm(-3) KOH at 200 degrees C. The treatment caused significant reduction of micropore volume but negligible changes in mesoporous domain, as evidenced by nitrogen adsorption measurements, as well as significant increase of surface N/C and O/C ratios, as evidenced by XPS method. In comparison to the C.PANI precursor, the new material, denoted as C.PANI.HAT200, delivered twice as high gravimetric capacitances, amounting to 363, 220 and 432 F g(-1), in 6 mol dm(-3) KOH, 2 mol dm(-3) KNO3 and 1 mol dm(-3) H2SO4, respectively, when measured potentiodynamically at a scan rate of 5 mV s(-1). Moreover, its exceptionally high electrocatalytic activity towards the oxygen reduction reaction (ORR), almost one order of magnitude higher than that of C.PANI was evidenced in alkaline media, approaching closely a four-electron pathway. The onset potential for ORR matched the one of platinum-based electrocatalyst. Significant improvements of both capacitive and electrocatalytic properties of C.PANI.HAT200 were discussed in correlation to the modification of surface functional groups. These findings affirm the low temperature hydrothermal post-synthetic modification of N-doped nanocarbons as a route of production of advanced multifunctional carbon materials with exceptional characteristics.",
publisher = "Oxford : Pergamon-Elsevier Science Ltd",
journal = "Carbon",
title = "Superior capacitive and electrocatalytic properties of carbonized nanostructured polyaniline upon a low-temperature hydrothermal treatment",
volume = "64",
pages = "472-486",
doi = "10.1016/j.carbon.2013.07.100"
}

Vujković, M., Gavrilov, N., Pasti, I., Krstić, J., Travas-Sejdic, J., Ciric-Marjanovic, G.,& Mentus, S.. (2013). Superior capacitive and electrocatalytic properties of carbonized nanostructured polyaniline upon a low-temperature hydrothermal treatment. in Carbon
Oxford : Pergamon-Elsevier Science Ltd., 64, 472-486.
https://doi.org/10.1016/j.carbon.2013.07.100

Vujković M, Gavrilov N, Pasti I, Krstić J, Travas-Sejdic J, Ciric-Marjanovic G, Mentus S. Superior capacitive and electrocatalytic properties of carbonized nanostructured polyaniline upon a low-temperature hydrothermal treatment. in Carbon. 2013;64:472-486.
doi:10.1016/j.carbon.2013.07.100 .

Vujković, Milica, Gavrilov, Nemanja, Pasti, Igor, Krstić, Jugoslav, Travas-Sejdic, Jadranka, Ciric-Marjanovic, Gordana, Mentus, Slavko, "Superior capacitive and electrocatalytic properties of carbonized nanostructured polyaniline upon a low-temperature hydrothermal treatment" in Carbon, 64 (2013):472-486,
https://doi.org/10.1016/j.carbon.2013.07.100 . .

TY  - JOUR
AU  - Janošević, Aleksandra
AU  - Pasti, Igor
AU  - Gavrilov, Nemanja
AU  - Mentus, Slavko
AU  - Ciric-Marjanovic, Gordana
AU  - Krstić, Jugoslav
AU  - Stejskal, Jaroslav
PY  - 2011
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/823
AB  - Micro/mesoporous conducting nitrogen-containing carbon nanorods/nanotubes with high surface area, and excellent electrocatalytic activity for the oxygen reduction reaction, were synthesized by the carbonization of self-assembled polyaniline (PANI) 5-sulfosalicylate nanorods/nanotubes. Carbonization was carried out by means of gradual heating in a nitrogen atmosphere up to 800 degrees C. The morphology of the PANI 5-sulfosalicylate was preserved after carbonization. Carbonized PANI nanostructures containing similar to 10 wt% of nitrogen had a conductivity of 0.8 S cm(-1). The influence of the carbonization on the porosity and specific surface area of the nanostructured PANI has been analyzed. The morphology, elemental composition, molecular structure, surface area, and electrical characteristics of novel carbonized nanostructured PANI were investigated by scanning and transmission electron microscopies, elemental microanalysis, FTIR and Raman spectroscopies, nitrogen adsorption-desorption and conductivity measurements, respectively. The electrocatalytic activity of carbonized PANI 5-sulfosalicylate nanorods/nanotubes material towards oxygen reduction reaction in alkaline conditions has been studied by the voltammetry with the rotating disc electrode.
PB  - Elsevier Science Sa, Lausanne
T2  - Synthetic Metals
T1  - Micro/mesoporous conducting carbonized polyaniline 5-sulfosalicylate nanorods/nanotubes: Synthesis, characterization and electrocatalysis
VL  - 161
IS  - 19-20
SP  - 2179
EP  - 2184
DO  - 10.1016/j.synthmet.2011.08.028
ER  - 

@article{
author = "Janošević, Aleksandra and Pasti, Igor and Gavrilov, Nemanja and Mentus, Slavko and Ciric-Marjanovic, Gordana and Krstić, Jugoslav and Stejskal, Jaroslav",
year = "2011",
abstract = "Micro/mesoporous conducting nitrogen-containing carbon nanorods/nanotubes with high surface area, and excellent electrocatalytic activity for the oxygen reduction reaction, were synthesized by the carbonization of self-assembled polyaniline (PANI) 5-sulfosalicylate nanorods/nanotubes. Carbonization was carried out by means of gradual heating in a nitrogen atmosphere up to 800 degrees C. The morphology of the PANI 5-sulfosalicylate was preserved after carbonization. Carbonized PANI nanostructures containing similar to 10 wt% of nitrogen had a conductivity of 0.8 S cm(-1). The influence of the carbonization on the porosity and specific surface area of the nanostructured PANI has been analyzed. The morphology, elemental composition, molecular structure, surface area, and electrical characteristics of novel carbonized nanostructured PANI were investigated by scanning and transmission electron microscopies, elemental microanalysis, FTIR and Raman spectroscopies, nitrogen adsorption-desorption and conductivity measurements, respectively. The electrocatalytic activity of carbonized PANI 5-sulfosalicylate nanorods/nanotubes material towards oxygen reduction reaction in alkaline conditions has been studied by the voltammetry with the rotating disc electrode.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Synthetic Metals",
title = "Micro/mesoporous conducting carbonized polyaniline 5-sulfosalicylate nanorods/nanotubes: Synthesis, characterization and electrocatalysis",
volume = "161",
number = "19-20",
pages = "2179-2184",
doi = "10.1016/j.synthmet.2011.08.028"
}

Janošević, A., Pasti, I., Gavrilov, N., Mentus, S., Ciric-Marjanovic, G., Krstić, J.,& Stejskal, J.. (2011). Micro/mesoporous conducting carbonized polyaniline 5-sulfosalicylate nanorods/nanotubes: Synthesis, characterization and electrocatalysis. in Synthetic Metals
Elsevier Science Sa, Lausanne., 161(19-20), 2179-2184.
https://doi.org/10.1016/j.synthmet.2011.08.028

Janošević A, Pasti I, Gavrilov N, Mentus S, Ciric-Marjanovic G, Krstić J, Stejskal J. Micro/mesoporous conducting carbonized polyaniline 5-sulfosalicylate nanorods/nanotubes: Synthesis, characterization and electrocatalysis. in Synthetic Metals. 2011;161(19-20):2179-2184.
doi:10.1016/j.synthmet.2011.08.028 .

Janošević, Aleksandra, Pasti, Igor, Gavrilov, Nemanja, Mentus, Slavko, Ciric-Marjanovic, Gordana, Krstić, Jugoslav, Stejskal, Jaroslav, "Micro/mesoporous conducting carbonized polyaniline 5-sulfosalicylate nanorods/nanotubes: Synthesis, characterization and electrocatalysis" in Synthetic Metals, 161, no. 19-20 (2011):2179-2184,
https://doi.org/10.1016/j.synthmet.2011.08.028 . .