A fast effective route to pH-dependent water-dispersion of oxidized single-walled carbon nanotubes

Arrais, Aldo; Diana, Eliano; Pezzini, Dario; Rossetti, R.; Boccaleri, Enrico

doi:10.1016/j.carbon.2005.10.012

Cited by 29 publications

(13 citation statements)

References 18 publications

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“…The solubility of these ultrashort carboxylated SWCNTs in organic solvents, superacid, and water was estimated to be about 2 wt %. Furthermore, Arrais and co-workers 16 reported the synthesis of pH-dependent, water-dispersible, oxidized SWCNTs. By this procedure, SWCNTs were suspended in tetrahydrofuran (THF) and stirred under anaerobic conditions in the presence of a liquid metal alkalialloy, and then subsequently the mixture was stirred under full aerobic atmosphere.…”

Section: Defect Site Chemistry -Oxidation Reactionsmentioning

confidence: 99%

Current Progress on the Chemical Modification of Carbon Nanotubes

2010

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Section: Defect Site Chemistry -Oxidation Reactionsmentioning

confidence: 99%

Current Progress on the Chemical Modification of Carbon Nanotubes

2010

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“…Oxidized CNT dispersion is one of the presently developed CNT dispersions. In this study, the stability of oxidized CNTs, which have potential application as supporters, field emission materials, adsorbents [21][22][23][24] and are extensively investigated for preparation of CNT dispersion [25,26] were investigated. The effect of salts on the stability was also investigated.…”

Section: Introductionmentioning

confidence: 99%

Aqueous stability of oxidized carbon nanotubes and the precipitation by salts

Peng

Jia

Gong

et al. 2009

Journal of Hazardous Materials

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“…That is, the electrostatic repulsion force between SWCNTs became greater so that it could overcome van der Waals force preventing their aggregation. [34][35][36] In order to further investigate modification of SWCNT after the ozone treatment, Raman spectroscopy was employed. As well known, two main peaks appear in Raman spectrum of SWCNT 37) (the inset of Fig.…”

Section: Analysis Of Chemical Functionalization and Zeta Potential Of...mentioning

confidence: 99%

Solubilization of Single-Walled Carbon Nanotubes Using Ozone Generated by Dielectric Barrier Discharge

Sun

Khaled

Tomita

et al. 2010

Jpn. J. Appl. Phys.

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This paper describes effects of ozone (O3) concentration on water-solubility of single-walled carbon nanotubes (SWCNTs). Ozone was generated by dielectric barrier discharge (DBD) in atmospheric air with the maximum concentration of 220 ppm. Water solubility of ozone-treated SWCNTs, which was evaluated by optical absorbance of the SWCNT suspension, increased with ozone treatment time and reached the maximum in 60 min. The dispersed SWCNTs suspension was stable even after two months of the ozone treatment. Fourier transform infrared (FTIR) spectroscopy and Raman spectra analysis revealed that SWCNTs surface was functionalized with chemical group such as –COO- after the ozone treatment. The longer ozone treatment introduced more functional groups and decreased zeta potential of the SWCNT surface, which improved water-solubility of the SWCNTs due to electrostatic repulsion force between them. It was also found that the ozone treatment induced morphological changes of SWCNTs.

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A fast effective route to pH-dependent water-dispersion of oxidized single-walled carbon nanotubes

Cited by 29 publications

References 18 publications

Current Progress on the Chemical Modification of Carbon Nanotubes

Current Progress on the Chemical Modification of Carbon Nanotubes

Aqueous stability of oxidized carbon nanotubes and the precipitation by salts

Solubilization of Single-Walled Carbon Nanotubes Using Ozone Generated by Dielectric Barrier Discharge

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