Journal of Materials Science

, Volume 52, Issue 11, pp 6837–6855 | Cite as

Tuning pore characteristics of porous carbon monoliths prepared from rubber wood waste treated with H3PO4 or NaOH and their potential as supercapacitor electrode materials

  • Uthen ThubsuangEmail author
  • Sakda Laebang
  • Nicharat Manmuanpom
  • Sujitra Wongkasemjit
  • Thanyalak Chaisuwan
Original Paper


The facile preparation of porous carbon monolith electrodes as a supercapacitor was demonstrated using rubber wood wastes treated with NaOH or H3PO4 as starting materials. Different concentrations of treating solutions were used (5 and 10% w/v). The effect of the pore structures of the porous carbon electrodes on their electrochemical performance and which parameters played important roles in the specific capacitance were also studied. The results revealed that the H3PO4-activated samples had microporous characteristics and a specific surface area of 605–693 m2/g, while the NaOH-activated samples exhibited mesoporous characteristics with a developed mesopore volume of 0.27 cm3/g. The specific surface area tended to increase with an increased H3PO4 concentration but decreased with an increased NaOH concentration. As confirmed by X-ray photoelectron spectrophotometry, oxygenated functional groups (OGF) were detected in all samples. Notwithstanding, a pseudo-Faradaic reaction as a result of OGF occurred only with the reference carbon and H3PO4-activated samples, while NaOH-activated samples with OGF exhibited ideal electrical double-layer capacitor behavior. Measured at 1 mV/s in 1 M H2SO4 solution, a carbon electrode prepared from 10% w/v H3PO4-treated rubber wood exhibited the maximum gravimetric capacitance of 129 F/g, a volumetric capacitance of 104 F/cm3, an energy density of 14.2 Wh/kg, and a power density of 500 W/kg. The results also showed that the mesopore volume and the average pore size rather than the specific surface area played important roles in the specific capacitance, but only when the percentage difference in the specific surface area between the two samples did not exceed 41%.


Porous Carbon Average Pore Size Mesopore Volume Electrochemical Impedance Spectroscopy Spectrum Volumetric Capacitance 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



The authors would like to express their deep appreciation to the Research Center of Excellence on Wood Science and Engineering, School of Engineering and Resources, Walailak University, and the Ratchadaphiseksomphot Endowment Fund, Chulalongkorn University, for financial supporting this research. In addition, special thanks also go to Prof. Suwabun Chirachanchai for his kind support with the potentiostat and to Dr. Andrew John Warner for proofreading this manuscript.

Supplementary material

10853_2017_922_MOESM1_ESM.doc (60 kb)
Supplementary material 1 (DOC 60 kb)


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Copyright information

© Springer Science+Business Media New York 2017

Authors and Affiliations

  • Uthen Thubsuang
    • 1
    Email author
  • Sakda Laebang
    • 1
  • Nicharat Manmuanpom
    • 2
  • Sujitra Wongkasemjit
    • 2
  • Thanyalak Chaisuwan
    • 2
  1. 1.Department of Materials Engineering, School of Engineering and ResourcesWalailak UniversityNakhon Si ThammaratThailand
  2. 2.The Petroleum and Petrochemical College and the Center of Excellence on Petrochemical and Materials TechnologyChulalongkorn UniversityBangkokThailand

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