A Study on the Evaluation Methods of Nitrogen Oxide Removal Performance of Photocatalytic Concrete for Outdoor Applications

In Korea, the issue of particulate matter pollution is growing, and many solutions are being developed to deal with it. Photocatalytic technology has been found be helpful in removing precursors such as nitrogen oxides that cause matter. a microcosm setup, ISO 22197-1 successfully used quantify removal from specimen which photocatalyst applied. However, owing lack suitable tools, on-site measurement real-scale efficacy difficult. Depending on substrate surrounding circumstances at application location, may function varying levels. Additionally, expected photocatalytic effect differ depending ambient air quality sunlight irradiation intensity. This article describes two approaches for studying outdoor concrete photocatalysis. Standard gas dual-reactor recommended evaluation approaches. The standard method was useful assessing applied itself an outcome field assessment. performance photocatalysts different sites mutually exclusive comparable. Over 180 min, building roof deck, NO by 0.68 ppm, whereas, shaded locations, amount 0.51 ppm (side wall) 0.24 (underpass) 300 min. dual reactor approach, other hand, discovered one most methods how much improvement there areas where have placed.