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Production and characterization of carbon nano colloid via one-step electrochemical method

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Abstract

We present a one-step electrochemical method to produce water-based stable carbon nano colloid (CNC) without adding any surfactants at the room temperature. The physical, chemical, and thermal properties of CNC prepared were characterized by using various techniques, such as particle size analyzer, zeta potential meter, TEM, XRD, FT-IR, turbidity meter, viscometer, and transient hot-wire method. The average primary size of the suspended spherical-shaped nanoparticles in the CNC was found to be ∼15 nm in diameter. The thermal conductivity of CNC compared with that of water was observed to increase up to ∼14% with the CNC concentration of ∼4.2 wt%. The CNC prepared in this study was considerably stable over the period of 600 h. With the assistance of FT-IR spectroscopy analysis, we confirmed the presence of carboxyl group (i.e., O–H stretching (3,458 cm−1) and C=O stretching (1,712 cm−1)) formed in the outer atomic layer of carbon nanoparticles, which (i) made the carbon particles hydrophilic and (ii) prevented the aggregation among primary nanoparticles by increasing the magnitude of zeta potential over the long period.

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Acknowledgments

This work was supported by grant no. 10026688 from the Advanced Technology Center Project of Ministry of Commerce, Industry and Energy.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Pusan National University, San 30, Jangjeon-dong, Geumjung-gu, Busan, 609-735, Korea

    Doohyun Kim, Yujin Hwang, Seong Ir Cheong & Jae Keun Lee

  2. Institute of SamchangTsinghua Nano Application, N-BARO TECH CO., LTD, 974-1, Goyeon-Ri, Ungchon-Myon, Ulju-Gun, Ulsan, 689-871, Korea

    Daeseung Hong & Seongyong Moon

  3. Industrial Liaison Innovation Cluster, Pusan National University, San 30, Jangjeon-dong, Geumjung-gu, Busan, 609-735, Korea

    Jung Eun Lee

  4. Department of Nanosystem and Nanoprocess Engineering, Pusan National University, San 30, Jangjeon-dong, Geumjeong-gu, Busan, 609-735, Korea

    Soo H. Kim

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  1. Doohyun Kim
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  2. Yujin Hwang
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  3. Seong Ir Cheong
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  4. Jae Keun Lee
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  5. Daeseung Hong
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  6. Seongyong Moon
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  7. Jung Eun Lee
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  8. Soo H. Kim
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Correspondence to Soo H. Kim.

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Kim, D., Hwang, Y., Cheong, S.I. et al. Production and characterization of carbon nano colloid via one-step electrochemical method. J Nanopart Res 10, 1121–1128 (2008). https://doi.org/10.1007/s11051-008-9359-2

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  • DOI: https://doi.org/10.1007/s11051-008-9359-2

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