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

Table 2

EDX result of CaO-TiO₂ with different soaking time in 0.6 M and 1.2 M calcium nitrate solution.

Concentration of calcium nitrate solution (M)	Element (at%)/reaction time (h)	Ti	O	Ca
0.6	24	46.07	52.92	01.01
	48	38.88	57.45	03.67
	72	42.30	53.11	04.59
1.2	24	36.44	60.66	02.90
	48	32.64	60.64	06.64
	72	28.83	61.10	09.78