Comparing characterization of functionalized multi-walled carbon nanotubes by potentiometric proton titration, NEXAFS, and XPS

Characterization of functional groups on oxidized multi-wall carbon nanotubes by potentiometric titration

“…The hydroxyl groups can withstand temperatures below 800°C. This titration method can potentially be an easy, fast routine characterization method for carbon material.In continued work, this method was tested by comparison with other methods of characterization such as XPS and NEXAFS [33].…”

Enhanced dispersion and electronic performance of single-walled carbon nanotube thin films without surfactant: A comprehensive study of various treatment processes

“…13,40,41 In order to study the acid functionalization effect on SWNT dispersion, the degree of oxygen functionalization was with the π*(C=O) and π*(C-O) transitions assigned to ~289 eV and ~290 eV, respectively. 16,42,43 These transitions are readily observed in Figure 1a. The edge jumps of the spectra are normalized to unity and the spectra is normalized at ~288 eV to directly compare the intensity of the peaks.…”

Cholic acid covalently bound to multi-walled carbon nanotubes: Improvements on dispersion stability

“…The principal C1s spectral feature of MWCNT was attributed a binding energy of 284.5 eV, and in case of methyl 3baminocholate the peak corresponding to aliphatic carbon species was attributed a binding energy of 285 eV. In addition to signals from carbonaceous and hydrocarbonaceous species, the high resolution XPS spectra show peaks centered at 286.2 ± 0.1, 287.6 ± 0.1, and 289.1 ± 0.1 eV which correspond to oxygen-functional carbon species like C*-O-C or C*-OH, C*¼O, and O-C*O, respectively [54,55]. Moreover, MWCNT-based materials show a shake-up signal at 291.1 ± 0.1 eV.…”