The authors have developed an air-purifying interior finish applied photocatalyst to create a good and comfortable indoor air quality. Developed interior finish applied photocatalyst is a high-function calcium silicate board that has many microsized pores. The optimum amount of photocatalytic TiO2 is applied to effectively eliminate harmful gas by adsorption and photodecomposition. It is shown that developed interior finish eliminates harmful chemical gas and bad smelling gas. In addition, developed interior finish is used in the conference room at OBAYASHI corporation and it has been confirmed that it eliminates formaldehyde and toluene gas.
