Influence of ZnO Morphology on the Functionalization Efficiency of Nanostructured Arrays with Hemoglobin for CO2 Capture

In this study, nanostructured ZnO arrays were synthesized by an accessible thermal oxidation (TO) methodology. The Zn films chemically etched with nitric acid (HNO3) and then oxidized in a furnace at 500 °C for 5 h. Two different morphologies achieved modifying the HNO3 concentration etching process: (a) grass-like nanostructures (b) rod-like nanostructures, process solution 2 8 M concentration, respectively. physical chemical properties of samples analyzed X-ray diffraction (XRD), scanning (SEM) transmission electron microscopy (TEM), energy dispersive spectroscopy (EDS), Raman spectroscopy. Both functionalized hemoglobin, difference was found efficiency functionalization, which monitored UV–Vis sample highest nanostructures. Afterward, capture carbon dioxide evaluated monitoring sodium carbonate interacting as-functionalized samples. evaluation results showed CO2 98.3% 54% 180 min