Abstract
In this report, the functionalization of MWCNTs in sulfuric/nitric acid is studied, and the influences of acid concentration, temperature and time on functionalization are assessed. Fourier Transmission Infrared (FTIR) spectroscopy was employed to study the functional groups of different samples. The optimal results for complete functionalization were achieved by the addition of 5 mg/ml of MWCNTs to acid, at a temperature of 100°C with 3 h of soaking time. The correlation between the FTIR and Raman spectra of the optimized sample was determined, and the effect of functional groups on the G and D bands is discussed.
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