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

Abstract EN

A novel one-dimensional anodic CaO-TiO2 nanotubes composite film was prepared using a rapid-anodic oxidation electrochemical anodization technique for low temperature CO2 absorption application.

This study aims to determine the optimum concentration of Ca(NO3)2·4H2O used as the CaO precursor for loading CaO species on TiO2 nanotubes.

In this study, an optimum content of CaO on TiO2 nanotubes (0.15 at% of Ca element) could enhance the CO2 adsorption capacity up to 2.45 mmol/g at 400°C.

This behavior was attributed to the large active surface area of CaO species were covered on the surface of TiO2 nanotubes.

The conversion of CaO into CaCO3 could be achieved effectively for CO2 absorption during the carbonate looping process.