However, the peaks at 190 cm-', 471 cm-', 517 cm-', 612 cm-', and 679 cm-' in the Co304/NPCS nanocomposites are observed, which can be assigned to the characteristic Raman peaks of crystalline Co304. The Raman results of the Co304/NPCS nanocomposites confirm the coexistence of crystalline Co304 and amorphous carbon.