Figure 4

XPS survey spectra of (a) bulk-gCN, (b) fructose_6h. C 1 s spectra of (c) bulk-gCN, (d) fructose_6h. N 1 s spectra of (e) bulk-gCN, (f) fructose_6h. O 1 s spectra of (g) bulk-gCN, (h) fructose_6h.

XPS survey spectra of (a) bulk-gCN, (b) fructose_6h. C 1 s spectra of (c) bulk-gCN, (d) fructose_6h. N 1 s spectra of (e) bulk-gCN, (f) fructose_6h. O 1 s spectra of (g) bulk-gCN, (h) fructose_6h.