Performance test of nitrogen oxide reduction of TiO2 photocatalyst coating materials

Abstract

This study confirmed NOx reduction performance using coating material mixed with TiO2 photocatalyst which has air purification effect to reduce NOx which is the secondary cause of particulate matter generation. The study was conducted through two experiments. First, the NOx reduction performance of TiO2 photocatalyst-infused coatings was confirmed through ISO 22197-1 2007 standard experiment. Second, the NOx reduction performance was confirmed by the change of NO gas concentration and UV-A light amount among standard experimental conditions. As a result, it was found that NOx reduction could be achieved even if the concentration of NO gas and UV-A light amount were lower than the standard condition when using the coating material mixed with TiO2 photocatalyst. It is judged that the NOx reduction effect can be obtained through TiO2 photocatalyst coating material even in winter or cloudy days with low solar altitude. Also, it was confirmed that UV-A light quantity has a greater effect on NOx reduction performance of TiO2 photocatalyst than NO gas concentration. Based on the study, it is expected that it will be used as basic data for evaluating various construction materials with TiO2 photocatalysts in the future. © 2020 16th Conference of the International Society of Indoor Air Quality and Climate: Creative and Smart Solutions for Better Built Environments, Indoor Air 2020. All rights reserved.