Anodic CaO-TiO₂ Nanotubes Composite Film for Low Temperature CO₂ Adsorption

Figure 1

(a) Top view and cross-sectional view (inset) of FESEM images of pure TiO₂ nanotubes obtained; CaO-TiO₂ composite film synthesized in the electrolyte composed of different concentrations of Ca(NO₃)₂, (b) 0.01 M, (c) 0.05 M, and (d) 0.1 M.

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