Modification of One-Dimensional TiO2 Nanotubes with CaO Dopants for High CO2 Adsorption
Figure 1
FESEM top view image of nanotubes subjected to wet impregnation of 0.6 M calcium nitrate solution for (a) 24 hours, (b) 48 hours, and (c) 72 hours and subsequent annealing at 673 K in Ar gas for 4 hours.