Abstract
Nitrogen oxides in exhaust gases from automobiles have been causing so serious air pollution in urban areas that building materials with a NOx removal performance have been required. We have developed a photocatalytic concrete with an oxidative NOx removal performance by means of a photocatalytic activity of titanium dioxide. The photocatalytic concrete is used for paving blocks. We researched the influence of various factors on the NOx removal performance of the photocatalytic paving blocks. As a result, it turned out that the paving blocks had the performance by which NOx was removed from the ambient air on a roadside.
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