The CO2 Storage Capacity of the Intercalated Diaminoalkane Graphene Oxides: A Combination of Experimental and Simulation Studies

Table 1 Physicochemical properties of GO, RGO, IGOs, and RIGOs

Samples	XRD d-spacing (nm)	S _BET ^a (m² g⁻¹)	S _mic ^b (m² g⁻¹)	Cumulative pore volume of CO₂ (cm³ g⁻¹)
GO	0.75	–	–	–
RGO	0.69	–	–	–
IGO-4	0.82	4.7	194.1	0.036
RIGO-4	0.79	14.0	334.7	0.053
IGO-8	0.97	10.6	138.4	0.022
RIGO-8	0.94	12.1	148.1	0.017
IGO-12	1.28	14.1	132.5	0.009
RIGO-12	1.24	26.1	118.5	0.008

^aBET surface area determined by N₂ sorption (77 K)
^bCumulative micropore surface area determined by CO₂ sorption (273 K) using the DFT method with a slit-shaped pore model