The Importance of Water for Purification of Longer Carbon Nanotubes for Nanocomposite Applications

Ultralong carbon nanotubes (UCNTs) are in high demand for nanocomposites applications due to their magnificent physical and chemical properties. UCNTs synthesized by the catalytic vapor deposition (CCVD) method and, before use as fillers nanocomposites, should be purified of residual catalyst non-CNT particles without significant destruction or scissoring UCNT. This study investigates role water purification from iron importance assistance this process is confirmed. It was shown that wet air treatment products CCVD synthesis under mild conditions can used sufficiently decrease content losses comparison results obtained with dry air, while significantly influence subsequent oxidation different forms carbons, including UCNTs. The increasing D/G ratio Raman spectra after makes it possible conclude transform into oxides hydroxides caused inner structural strains shells, improving removal acid treatment. develop economically ecologically friendly methods obtaining applications.