Figure 5. Raman spectra obtained at 633 nm and the intensity of 50% for initial MWCNTs (MWCNT) and RGO reduced by sodium hypophosphite from the nanotubes oxidized with potassium dichromate (MWCNT – Сr) and potassium permanganate (MWCNT – Mn)

From

Influence of the synthesis conditions of reduced graphene oxide on the electrochemical characteristics of the oxygen electrode

M.O. Danilov, I.A. Slobodyanyuk, I.A. Rusetskii, G.I. Dovbeshko, G.Ya. Kolbasov

Nanoscience and Nanotechnology Research. 2014, 2(1), 12-17 doi:10.12691/nnr-2-1-3