10.1186/2193-8865-3-73

Influence of surface oxidation on the morphological and crystallographic structure of multi-walled carbon nanotubes via different oxidants

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  • Hassan Khani1,
  • Omid Moradi*1,
  1. Department of Chemistry, Shahre Qods Branch, Islamic Azad University, Tehran, IR
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Published in Issue 20-08-2013

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Khani, H., & Moradi, O. (2013). Influence of surface oxidation on the morphological and crystallographic structure of multi-walled carbon nanotubes via different oxidants. Journal of Nanostructure in Chemistry, 3(1 (December 2013). https://doi.org/10.1186/2193-8865-3-73
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Abstract

Abstract In this paper, three kinds of multi-walled carbon nanotubes (MWCNTs) with different diameters (outer diameters: 10 to 20, 30 to 50, and >50 nm) and special surface areas (200, 60, and 40 m 2 /g, respectively) were oxidized in commonly used liquid oxidizers: (1) concentrated nitric acid, (2) a mixture of nitric + sulfuric acids ( V : V , 1:3), (3) hydrogen peroxide, (4) a mixture of hydrogen peroxide + sulfuric acid ( V : V , 1:1), and (5) acidic potassium permanganate. Morphology of the pristine and oxidized MWCNTs was characterized by scanning electron microscopy which provides sufficient resolution for direct visualization of their outer diameter distribution. Full width at half maximum (FWHM) in the X-ray diffraction (XRD) investigation of the MWCNT samples before and after the oxidation process was measured. After treatment with oxidants, a clear decrease in nanotube diameters along the tube walls was observed. Decrease in the degree of crystallites started with the FWHM widening of the XRD diffraction peaks. The particle (crystallite) size ( d 002 ) calculated by Bragg's law and Scherrer equation increased depending on the kind of oxidants; the procedure can be performed using a mixture of HNO 3 + H 2 SO 4 on the surface of the MWCNTs with an outer diameter of 10 to 20nm. However, similar are the diffraction patterns of pristine and oxidized MWCNTs. Therefore, the MWCNTs that underwent oxidation process were able to preserve the first features of their structures, even though some narrowing of outer diameters and decreases in crystallites appeared. Nevertheless, the structure of MWCNTs still remains intact to be used as oxidized nanotubes in most applications.

Keywords

  • Multi-walled carbon nanotube,
  • Surface functionalization,
  • Morphology,
  • Crystallographic structure
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References

  1. Ilya et al. (2012) Oxidation behavior of multiwall carbon nanotubes with different diameters and morphology (pp. 6272-6280) https://doi.org/10.1016/j.apsusc.2012.03.021
  2. Chen et al. (2012) Influence of surface functionalization via chemical oxidation on the properties of carbon nanotubes (pp. 32-38) https://doi.org/10.1016/j.jcis.2011.12.073
  3. Datsyuk et al. (2008) Chemical oxidation of multiwalled carbon nanotubes (pp. 833-840) https://doi.org/10.1016/j.carbon.2008.02.012
  4. Avilés et al. (2009) Evaluation of mild acid oxidation treatments for MWCNT functionalization (pp. 2970-2975) https://doi.org/10.1016/j.carbon.2009.06.044
  5. Dandekar et al. (1998) Characterization of activated carbon, graphitized carbon fibers and synthetic diamond powder using TPD and DRIFTS (pp. 1821-1831) https://doi.org/10.1016/S0008-6223(98)00154-7
  6. Pereira et al. (2010) Characterization of carbon nanotube 3D-structures infused with low viscosity epoxy resin system (pp. 2252-2257) https://doi.org/10.1016/j.compstruct.2009.08.009
  7. Tsang et al. (1994) A simple chemical method of opening and filling carbon nanotubes 372(6502) (pp. 59-62) https://doi.org/10.1038/372159a0
  8. Moreno-Castilla et al. (1998) Effects of non-oxidant and oxidant acid treatments on the surface properties of an activated carbon with very low ash content (pp. 145-151) https://doi.org/10.1016/S0008-6223(97)00171-1
  9. Zhang et al. (2003) Effect of chemical oxidation on the structure of single-walled carbon nanotubes (pp. 3712-3718) https://doi.org/10.1021/jp027500u
  10. Aksoylu et al. (2001) The effects of different activated carbon supports and support modifications on the properties of Pt/AC catalysts (pp. 175-185) https://doi.org/10.1016/S0008-6223(00)00102-0
  11. Esumi et al. (1995) Chemical treatment of carbon nanotubes 34(2) (pp. 279-281) https://doi.org/10.1016/0008-6223(96)83349-5
  12. Figueiredo et al. (2007) Characterization of active sites on carbon catalysts (pp. 4110-4115) https://doi.org/10.1021/ie061071v
  13. Chen et al. (1998) Solution properties of single-walled carbon nanotubes 282(5386) (pp. 95-98) https://doi.org/10.1126/science.282.5386.95
  14. Cuervo et al. (2008) Modification of the adsorption properties of high surface area graphites by oxygen functional groups (pp. 2096-2106) https://doi.org/10.1016/j.carbon.2008.08.025
  15. Zhao et al. (2004) Synthesis and properties of a water-soluble single-walled carbon nanotube-poly(maminobenzene sulfonic acid) graft copolymer 14(1) (pp. 71-76) https://doi.org/10.1002/adfm.200304440
  16. Osorio et al. (2008) H2SO4/HNO3/HCl—functionalization and its effect on dispersion of carbon nanotubes (pp. 2485-2489) https://doi.org/10.1016/j.apsusc.2008.07.144
  17. Lin et al. (2006) Functionalizing multi-walled carbon nanotubes with poly(oxyalkylene)- amidoamines 17(13) (pp. 3197-3203) https://doi.org/10.1088/0957-4484/17/13/020
  18. Liang et al. (2005) Preparation and characterization of multi-walled carbon nanotubes supported PtRu catalysts for proton exchange membrane fuel cells (pp. 3144-3152) https://doi.org/10.1016/j.carbon.2005.06.017
  19. Nobili et al. (1990) Characterization of electrophoretic fractions of humic substances with different electrofocusing behaviour 150(5) (pp. 763-770) https://doi.org/10.1097/00010694-199011000-00002
  20. Ötvös et al. (2006) Surface oxygen complexes as governors of neopentane sorption in multiwalled carbon nanotubes (pp. 1665-1672) https://doi.org/10.1016/j.carbon.2006.01.005
  21. Figueiredo et al. (1999) Modification of the surface chemistry of activated carbons (pp. 1379-1389) https://doi.org/10.1016/S0008-6223(98)00333-9
  22. Tran et al. (2007) Thermal oxidative cutting of multi-walled carbon nanotubes 45(12) (pp. 2341-2350) https://doi.org/10.1016/j.carbon.2007.07.012
  23. Toebes et al. (2004) The influence of oxidation on the texture and the number of oxygen-containing surface groups of carbon nanofibers (pp. 307-315) https://doi.org/10.1016/j.carbon.2003.10.036
  24. Ajayan et al. (1993) Opening carbon nanotubes with oxygen and implications for filling 362(6420) (pp. 522-525) https://doi.org/10.1038/362522a0
  25. Barroso-Bujans et al. (2007) Degree of functionalization of carbon nanofibers with benzenesulfonic groups in an acid medium (pp. 1669-1678) https://doi.org/10.1016/j.carbon.2007.03.039
  26. Hu et al. (2003) Nitric acid purification of single-walled carbon nanotubes 107(50) (pp. 13838-13842)
  27. Yu-Chun et al. (2011) The influence of treatment duration on multi-walled carbon nanotubes functionalized by H2SO4/HNO3 oxidation (pp. 2401-2410) https://doi.org/10.1016/j.apsusc.2010.09.110
  28. Wang et al. (2007) Adsorption of fulvic acids from aqueous solutions by carbon nanotubes 82(8) (pp. 698-704) https://doi.org/10.1002/jctb.1708
  29. Li et al. (2008) Oxidation of single-walled carbon nanotubes in dilute aqueous solutions by ozone as affected by ultrasound (pp. 466-475) https://doi.org/10.1016/j.carbon.2007.12.012