Synergistic Effect of Combined Polymorphs Anatase-Rutile Nano-Modified Lightweight Concrete on Photocatalytic Reduction of NOx, Self-Cleaning Performance, and Antimicrobial Properties

Anatase, one of the polymorphs titanium dioxide (TiO2), has become most widely used semiconductor for photocatalytic materials due to its chemical and physical properties. However, researchers have been studying use alternative (e.g., ZnO, N-doped, C-doped TiO2) improve activity cementitious materials. In this paper, we propose a modification lightweight concrete by introducing mixed phases dioxide—anatase rutile—to enhance performance. The efficiency NOx degradation nano TiO2-modified concrete, self-cleaning performance, antimicrobial properties were studied. without TiO2 with addition anatase, rutile, anatase-rutile was compared. results show that modifying samples adding mixture anatase rutile (2.5 wt % A + 2.5 R) significantly improved performance concrete.