Table 1.

Elemental analysis result of rGO samples synthesized at various drying temperatures with the corresponding data of graphite as reference.

	carbon content (wt%)	oxygen content (wt%)	C/O ratio
graphite	99.57	—	—
rGO-120	33.61	49.46	0.679
rGO-200	66.19	25.77	2.587
rGO-250	70.54	22.81	3.095
rGO-300	70.74	24.46	2.89