Highly photocatalytic efficiency and scour-durable of CO2 capture photocatalytic materials

Abstract

Cement-based photocatalytic materials have attracted considerable attention for their potential in the degradation of air pollutants. However, there is a pressing need to enhance the environmental stability of surface photocatalyst loads and improve the low-carbon preparation of the loaded matrix. In this study, a novel TiO2-SiO2 (TS) based CO2 capture photocatalytic material (TSC) was prepared by compressing molding method. TSC exhibits excellent photocatalytic efficiency, as demonstrated by its performance in NOx degradation tests and rhodamine B degradation. Notably, the photocatalytic efficiency of TSC in removing NO and its nitrate selectivity did not decrease significantly after the 7200-minute scouring test, primarily due to the increased specific surface area and low Ti element leaching. These results suggest that the carbonation binding materials used in TSC shows great promise for photocatalytic building applications. Meanwhile, the carbonation process during curing enables the absorption of CO2, making it beneficial for achieving a “Carbon Neutral” approach.