Table 1.

Elemental compositions and specific surface areas of samples carbonized at different temperatures and constant mass ratio of CDs to NaH₂PO₄ (1:10)

Samples	C xps [At%]	O xps [At%]	P xps [At%]	S BET [m2 g−1]
C‐400	89.20	10.28	0.52	21.996
C‐600	93.11	6.33	0.56	59.171
C‐800	93.28	5.97	0.75	189.609
C‐900 (P‐CNSs)	90.92	7.69	1.39	549.844