Structural and electrochemical properties of babassu coconut mesocarp-generated activated carbon and few-layer graphene

Anupama Ghosh, Claudia do Amaral Razzino, Archi Dasgupta, Kazunori Fujisawa, Laís Helena S. Vieira, Shruti Subramanian, Rubens S. Costa, Anderson O. Lobo, Odair P. Ferreira, Joshua Alexander Robinson, Mauricio Terrones Maldonado, Humberto Terrones, Bartolomeu C. Viana

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Activated Carbon (AC) with high specific surface area and elevated porosity was synthesized from babassu mesocarp by hydrothermal carbonization, followed by KOH activation-coupled pyrolysis and subjected to heat-treatment at three different temperatures to generate AC-1100, AC-1400 and AC-2200. Raman spectroscopy, X-Ray diffraction (XRD), transmission electron microscopy (TEM) and N 2 adsorption-desorption were used to characterize structurally the synthesized materials and electrochemical studies to evaluate the capacitance properties. The Raman spectra showed sharpening of graphitic bands and decrease in intensities of amorphous bands with the increase of treatment temperature. AC-2200 showed a significant decrease of I D /I G due to the crystal growth in ab plane and drastic increase of I 2D /I G due to graphitic ordering in c direction, further proven by sharpening of characteristic XRD peaks and visualization of few-layer well-formed graphite micro-crystals by TEM. Although gradual heat treatment resulted in an increase in sample crystallinity, the surface area and porosity decreased, leaving AC-2200 practically non-porous. These changes were reflected in their electrochemical properties as AC-1400 showed highest double layer capacitance owing to an optimization between structural ordering and retention of porosity, while the capacitance, as well as the resistance, of AC-2200, decreases dramatically due to loss of pores and increased crystallinity brought in by graphitization.

Original languageEnglish (US)
Pages (from-to)175-186
Number of pages12
JournalCarbon
Volume145
DOIs
StatePublished - Apr 1 2019

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Graphite
Electrochemical properties
Activated carbon
Graphene
Structural properties
Capacitance
Porosity
Heat treatment
Transmission electron microscopy
X ray diffraction
Graphitization
Structural optimization
Carbonization
Crystallization
Crystal growth
Specific surface area
Raman spectroscopy
Raman scattering
Desorption
Pyrolysis

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)

Cite this

Ghosh, A., Razzino, C. D. A., Dasgupta, A., Fujisawa, K., Vieira, L. H. S., Subramanian, S., ... Viana, B. C. (2019). Structural and electrochemical properties of babassu coconut mesocarp-generated activated carbon and few-layer graphene. Carbon, 145, 175-186. https://doi.org/10.1016/j.carbon.2018.12.114
Ghosh, Anupama ; Razzino, Claudia do Amaral ; Dasgupta, Archi ; Fujisawa, Kazunori ; Vieira, Laís Helena S. ; Subramanian, Shruti ; Costa, Rubens S. ; Lobo, Anderson O. ; Ferreira, Odair P. ; Robinson, Joshua Alexander ; Terrones Maldonado, Mauricio ; Terrones, Humberto ; Viana, Bartolomeu C. / Structural and electrochemical properties of babassu coconut mesocarp-generated activated carbon and few-layer graphene. In: Carbon. 2019 ; Vol. 145. pp. 175-186.
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title = "Structural and electrochemical properties of babassu coconut mesocarp-generated activated carbon and few-layer graphene",
abstract = "Activated Carbon (AC) with high specific surface area and elevated porosity was synthesized from babassu mesocarp by hydrothermal carbonization, followed by KOH activation-coupled pyrolysis and subjected to heat-treatment at three different temperatures to generate AC-1100, AC-1400 and AC-2200. Raman spectroscopy, X-Ray diffraction (XRD), transmission electron microscopy (TEM) and N 2 adsorption-desorption were used to characterize structurally the synthesized materials and electrochemical studies to evaluate the capacitance properties. The Raman spectra showed sharpening of graphitic bands and decrease in intensities of amorphous bands with the increase of treatment temperature. AC-2200 showed a significant decrease of I D /I G due to the crystal growth in ab plane and drastic increase of I 2D /I G due to graphitic ordering in c direction, further proven by sharpening of characteristic XRD peaks and visualization of few-layer well-formed graphite micro-crystals by TEM. Although gradual heat treatment resulted in an increase in sample crystallinity, the surface area and porosity decreased, leaving AC-2200 practically non-porous. These changes were reflected in their electrochemical properties as AC-1400 showed highest double layer capacitance owing to an optimization between structural ordering and retention of porosity, while the capacitance, as well as the resistance, of AC-2200, decreases dramatically due to loss of pores and increased crystallinity brought in by graphitization.",
author = "Anupama Ghosh and Razzino, {Claudia do Amaral} and Archi Dasgupta and Kazunori Fujisawa and Vieira, {La{\'i}s Helena S.} and Shruti Subramanian and Costa, {Rubens S.} and Lobo, {Anderson O.} and Ferreira, {Odair P.} and Robinson, {Joshua Alexander} and {Terrones Maldonado}, Mauricio and Humberto Terrones and Viana, {Bartolomeu C.}",
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doi = "10.1016/j.carbon.2018.12.114",
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Ghosh, A, Razzino, CDA, Dasgupta, A, Fujisawa, K, Vieira, LHS, Subramanian, S, Costa, RS, Lobo, AO, Ferreira, OP, Robinson, JA, Terrones Maldonado, M, Terrones, H & Viana, BC 2019, 'Structural and electrochemical properties of babassu coconut mesocarp-generated activated carbon and few-layer graphene', Carbon, vol. 145, pp. 175-186. https://doi.org/10.1016/j.carbon.2018.12.114

Structural and electrochemical properties of babassu coconut mesocarp-generated activated carbon and few-layer graphene. / Ghosh, Anupama; Razzino, Claudia do Amaral; Dasgupta, Archi; Fujisawa, Kazunori; Vieira, Laís Helena S.; Subramanian, Shruti; Costa, Rubens S.; Lobo, Anderson O.; Ferreira, Odair P.; Robinson, Joshua Alexander; Terrones Maldonado, Mauricio; Terrones, Humberto; Viana, Bartolomeu C.

In: Carbon, Vol. 145, 01.04.2019, p. 175-186.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Structural and electrochemical properties of babassu coconut mesocarp-generated activated carbon and few-layer graphene

AU - Ghosh, Anupama

AU - Razzino, Claudia do Amaral

AU - Dasgupta, Archi

AU - Fujisawa, Kazunori

AU - Vieira, Laís Helena S.

AU - Subramanian, Shruti

AU - Costa, Rubens S.

AU - Lobo, Anderson O.

AU - Ferreira, Odair P.

AU - Robinson, Joshua Alexander

AU - Terrones Maldonado, Mauricio

AU - Terrones, Humberto

AU - Viana, Bartolomeu C.

PY - 2019/4/1

Y1 - 2019/4/1

N2 - Activated Carbon (AC) with high specific surface area and elevated porosity was synthesized from babassu mesocarp by hydrothermal carbonization, followed by KOH activation-coupled pyrolysis and subjected to heat-treatment at three different temperatures to generate AC-1100, AC-1400 and AC-2200. Raman spectroscopy, X-Ray diffraction (XRD), transmission electron microscopy (TEM) and N 2 adsorption-desorption were used to characterize structurally the synthesized materials and electrochemical studies to evaluate the capacitance properties. The Raman spectra showed sharpening of graphitic bands and decrease in intensities of amorphous bands with the increase of treatment temperature. AC-2200 showed a significant decrease of I D /I G due to the crystal growth in ab plane and drastic increase of I 2D /I G due to graphitic ordering in c direction, further proven by sharpening of characteristic XRD peaks and visualization of few-layer well-formed graphite micro-crystals by TEM. Although gradual heat treatment resulted in an increase in sample crystallinity, the surface area and porosity decreased, leaving AC-2200 practically non-porous. These changes were reflected in their electrochemical properties as AC-1400 showed highest double layer capacitance owing to an optimization between structural ordering and retention of porosity, while the capacitance, as well as the resistance, of AC-2200, decreases dramatically due to loss of pores and increased crystallinity brought in by graphitization.

AB - Activated Carbon (AC) with high specific surface area and elevated porosity was synthesized from babassu mesocarp by hydrothermal carbonization, followed by KOH activation-coupled pyrolysis and subjected to heat-treatment at three different temperatures to generate AC-1100, AC-1400 and AC-2200. Raman spectroscopy, X-Ray diffraction (XRD), transmission electron microscopy (TEM) and N 2 adsorption-desorption were used to characterize structurally the synthesized materials and electrochemical studies to evaluate the capacitance properties. The Raman spectra showed sharpening of graphitic bands and decrease in intensities of amorphous bands with the increase of treatment temperature. AC-2200 showed a significant decrease of I D /I G due to the crystal growth in ab plane and drastic increase of I 2D /I G due to graphitic ordering in c direction, further proven by sharpening of characteristic XRD peaks and visualization of few-layer well-formed graphite micro-crystals by TEM. Although gradual heat treatment resulted in an increase in sample crystallinity, the surface area and porosity decreased, leaving AC-2200 practically non-porous. These changes were reflected in their electrochemical properties as AC-1400 showed highest double layer capacitance owing to an optimization between structural ordering and retention of porosity, while the capacitance, as well as the resistance, of AC-2200, decreases dramatically due to loss of pores and increased crystallinity brought in by graphitization.

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DO - 10.1016/j.carbon.2018.12.114

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