Plasma Treated Active Carbon for Capacitive Deionization of Saline Water

Figure 5

Raman shift of the untreated and plasma treated active carbon. Plasma power used was 50 W, 75 W, and 100 W. The G peak at 1598 cm⁻¹ shows the highly ordered sp² C structure and its full width at half maximum (FWHM(G)) indicates the level of sp² C disorder. The FWHM(G) increased from 65.5 cm⁻¹ for the untreated active carbon to 73.8 cm⁻¹ for the 75 W treated. The FWHM(G) did not change much when the carbon was treated at 50 W and 100 W.