Summary of recent research on gas separation with (r)GO-assisted membranes^a.

Membrane materials	Synthesis methods	Membrane thickness	Gas selectivity	Gas permeability, barrer	Ref.
Pure GO	Spin coating	20 nm	H2/CO2: ca. 240	H2: 3.4 × 10−7 mol (m2 s−1 Pa)	138
GO/K2B4O7/PES	Vacuum filtration	—	CO2/CH4: 75	CO2: 650 GPU	139
GO/PEBA	Casting	—	CO2/N2: 80	CO2: 110 barrer	140
ZIF-8/GO	Contra-diffusion	100 nm	H2/C3H8: 405	H2: 5.46 × 10−8 mol (m2 s−1 Pa)	141
			H2/N2: 11.1
UiO-66-NH2/GO	Vacuum filtration	1.9 μm	H2/N2: 9.75	H2: 3.9 × 10−8 mol (m2 s−1 Pa)	142
			H2/CO2: 6.35
(PDMS)/GO	Casting and thermal treatment	ca. 100 μm	CO2/N2: 24	CO2: 27.7 barrer	143
Pebax/ZIF-8/GO	Casting and thermal treatment	55–65 μm	CO2/N2: 47.6	CO2: 249 barrer	144
Pebax/r-GO	Solution-casting	45–60 μm	CO2/N2: 104	CO2: 119 barrer	94
Pure GO	Spray coating	1 μm	H2/CO2: 20.9	H2: 2.7 × 10−8 mol (m2 s−1 Pa)	141
PEI/GO	LBL assembly	1 μm	H2/CO2: 30	H2: 1000 barrer	93

^a1 GPU = 1 × 10⁻⁶ (STP) cm³/(cm² s cmHg); 1 barrer = 10⁻¹⁰ cm³ (STP) cm/(cm² s cmHg); STP: standard temperature and pressure.