Mass production of tunable multicolor graphene quantum dots from an energy resource of coke by a one-step electrochemical exfoliation

Carbon and graphene quantum dots: a review on syntheses, characterization, biological and sensing applications for neurotransmitter determination

“…1 depicts the whole construction procedure of the coal based GQDs. 58 The researchers used a platinum plate electrode as a counter electrode and a little cuboid coke lump was applied as a working electrode. Then, the coke has been electrolyzed in the H 2 O and MeOH mixture at distinct ratios of volume in the range between 10 : 90 and 85 : 15 with 0.1 M of (NH 4 ) 2 S 2 O 8 (pH equal to 7.0) which is considered as the electrolyte for one hour, and the current intensity in the range between 80 and 400 mA cm À2 .…”

“…In addition, the bright B-GQDs were obtained with the QY as much as 19.27% through reducing NaBH 4 . 58 Fu et al devised an electrochemical synthesis technique for preparing the N-GQDs with average diameter of 20 nm. These NPs can release 3 basic color uorescence of blue, red, and green independently because of their quantum connement and the edge impacts of the surface moods.…”

“…schema of the synthetic procedure of multi-color GQDs from the coke. Reprinted with permission 58. Copyright 2018, Elsevier.…”

Earth abundant colloidal carbon quantum dots for luminescent solar concentrators

“…Very recently, He et al reported an electrochemical exfoliation method to synthesize C-dots with a size of 3.02-4.61 nm by using a cut piece of commercial coke directly as the working electrode. 101 Compared with other synthesis methods of C-dots, the electrochemical method does not require further complicated purification procedures, 101 while the as-prepared C-dots have a lower QY than that of those synthesized by other approaches. 62,81,100,101 We summarized the synthesis of C-dots using different precursors and solvents through the above-mentioned methods.…”

“…101 Compared with other synthesis methods of C-dots, the electrochemical method does not require further complicated purification procedures, 101 while the as-prepared C-dots have a lower QY than that of those synthesized by other approaches. 62,81,100,101 We summarized the synthesis of C-dots using different precursors and solvents through the above-mentioned methods. The hydro/solvothermal method is very simple to operate and the properties of the C-dots can be well controlled by controlling the degree of decomposition.…”