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Catalytic growth of carbon nanofibers on Cr nanoparticles on a carbon substrate: adsorbents for organic dyes in water

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Abstract

We have produced carbon nanofibers (CNFs) using leather waste that had been tanned with a chromium bath, and when dried contained Cr2O3. Suitable reduction processing produced a carbon substrate with supported nanoparticles of chromium metal. Powder X-ray diffraction showed that the Cr2O3 is reduced on the carbon surface to produce CrC and metal Cr, which is the effective catalyst for the CNFs growth. The CNF arrays were confirmed by TEM images. Raman data revealed that the synthesized CNFs have a poor-quality graphite structure which favors their use in adsorption processes. These CNFs presented higher affinity to adsorb anionic dyes, whereas the cationic dyes are better adsorbed on the carbon substrate. The low-cost and availability of the carbon precursor makes their potential use to produce CNFs of interest.

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Acknowledgments

We thank PRPq/UFMG, FAPEMIG and CNPq for financial support. Santander Bank Award (2008).

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Authors and Affiliations

  1. Departamento de Química, ICEx, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, 31270-901, Brazil

    Luiz Carlos Alves de Oliveira, Adilson Cândido da Silva & Alan Rodrigues Teixeira Machado

  2. Departamento de Química, Universidade Federal de Juiz de Fora, Juiz de Fora, Minas Gerais, 36036-900, Brazil

    Renata Diniz

  3. Instituto de Ciência, Engenharia e Tecnologia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Teófilo Otoni, Minas Gerais, 39803-371, Brazil

    Márcio César Pereira

Authors
  1. Luiz Carlos Alves de Oliveira
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  2. Adilson Cândido da Silva
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  3. Alan Rodrigues Teixeira Machado
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  4. Renata Diniz
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  5. Márcio César Pereira
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Correspondence to Luiz Carlos Alves de Oliveira.

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de Oliveira, L.C.A., da Silva, A.C., Machado, A.R.T. et al. Catalytic growth of carbon nanofibers on Cr nanoparticles on a carbon substrate: adsorbents for organic dyes in water. J Nanopart Res 15, 1631 (2013). https://doi.org/10.1007/s11051-013-1631-4

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  • DOI: https://doi.org/10.1007/s11051-013-1631-4

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