Modification of One-Dimensional TiO₂ Nanotubes with CaO Dopants for High CO₂ Adsorption

Table 3

CO₂ adsorption capacity of the CaO-TiO₂ samples.

Concentration of calcium nitrate solution (M)	Soaking period (hours)	CO2 adsorption capacity (mmol/g)
0.6	24	3.89
	48	3.32
	72	4.00
1.2	24	3.59
	48	4.45
	72	3.80