indicates the highly corresponding relationship between the molecular disorder degree of the VGM and the addition of VC. The increase of D/G ratio after reduction can be attributed to the mild reducing condition. Under ambient conditions, the reduction process will mainly remove hydroxyl and epoxy groups and restore C=C. It can be explained that a large number of double bonds were created, and only a relatively smaller number of aromatic rings were restored. The increased D/G ratio can reasonably interpret that the reduction process increases the total quantity of graphitic domains, but decreases the average size of sp 2 domains, especially the newly formed domains, and thus increase the fraction of edges and defects on rGO sheets.