Ultrafine titanium dioxide-based paint for removing nitrogen oxides in an indoor and outdoor environment

Abstract

The development of innovative materials with de-polluting properties that can be easily applied on facades could be a significant step towards the improvement of air quality. The nitrogen oxide (NOx) removal efficiency of an ultrafine titanium dioxide-based (UF TiO2) paint was evaluated by comparing its efficiency in an indoor and outdoor environment. UF TiO2 paint coated strips were subjected to ion chromatography analysis (ICA). ICA yielded a 2.24 g/m2 NOx removal in the outdoor environment while only a 0.04 g/m2 in the indoor environment. The evaluation points to the outdoors as a more suitable environment for the de-polluting paint.