Table 4.

Performance comparison of room temperature CO₂ gas sensing.

Materials	Synthesis/Fabrication Method	CO2 Concentration (ppm)	Response Time	Recovery Time	Reference
Amino−ZnO nanohybrids	in situ hydrothermal	500	206 s	354 s	[13]
Reduced graphene oxide	Hydrogen plasma reduction	1500	4 min	4 min	[31]
Self-standing MWCNTs/alumina composite film	Hydrolysis	50–450	53.7 s	14.15 s	[66]
Carbon nanotube on a polyimide substrate	Chemical vapor deposition	50	12 s	56 s	[18]
Ru-decorated WS2 quantum dots	Two-step synthesis process	500–5000	52 s	138 s	[14]
Cyano-terminated ethynylated-thiourea	Chemical synthesis	10–1000	1 min	3 min	[2]
Al/maPsi/n-Si/Al	Laser assisted etching (LAE)	-	2.9 min	4.1 min	[17]
Graphene oxide	Spray pyrolysis on fluorine tin oxide	-	125 s	110 s	[15]
Nanocrystalline diamond	Microwave Plasma CVD process	2500	120 s	400 s	[16]
Vanadium Oxide	Vacuum thermal evaporation	-	50 s	125 s	[65]
AArGO	Chemical reduction	500	26 s	10 s	This work