Title
Synthesis of hollow carbon spheres by chemical activation of carbon nanoparticles for their use in electrochemical capacitor
Author
Cesar Eduardo Sanchez Rodriguez
EDUARDO TOVAR MARTINEZ
MARISOL REYES REYES
Luis Felipe Cházaro Ruiz
ROMAN LOPEZ SANDOVAL
Access level
Open Access
Alternative identifier
doi: https://doi.org/10.1016/j.cartre.2022.100220
Subjects
Summary or description
"Naphthalene combustion has been used to synthesize grams per hour of solid carbon spheres (CS). The carbon soot was activated by acid treatment consisting in a mixture of HNO3 and H2SO4 (1/3 v/v) to produce hollow carbon spheres (HCS). The effect of two concentrations of CSs (5 and 10 mg mL−1) in the acid mixture, on the physicochemical properties of the activated HCSs was studied. The HSCs were subjected to a thermal treatment to increase their graphitization to enhance their electrical conductivity. High-resolution transmission electron microscopy confirmed the formation of HCSs due to the acid treatment whereas FTIR spectra showed that the chemical activation produced functional groups on the carbon spheres surface and the heat treatment effect to remove some of them as well. A specific surface area of 300 m2 g−1 and a large density of micropores for the acid-treated CSs as well as the heat-treated CSs were estimated by analysis of N2 adsorption-desorption isotherms. A specific capacitance 70 F g−1 was calculated by cyclic voltammetry of the acid and thermally treated HCSs at 5 mV s−1, for both CS concentrations, indicating the possibility of synthesizing these HCSs using a simple method in large quantities for their use in electrochemical capacitors."
Publisher
Elsevier
Publish date
2022
Publication type
Article
Publication version
Published Version
Information Resource
Format
application/pdf
Citation suggestion
C.E. Sánchez-Rodriguez, E. Tovar-Martinez, M. Reyes-Reyes, Luis F. Chazaro-Ruiz, R. López-Sandoval, Synthesis of hollow carbon spheres by chemical activation of carbon nanoparticles for their use in electrochemical capacitor, Carbon Trends, Volume 9, 2022, 100220, https://doi.org/10.1016/j.cartre.2022.100220.
Source repository
Repositorio IPICYT
Downloads
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