PHOTOCATALYST SUPPORTING COMPOSITION

摘要

PROBLEM TO BE SOLVED: To prevent the decrease of photodecomposition performance with time. SOLUTION: In a photocatalyst supporting composition in which a photocatalyst material is formulated to a support material containing cement mainly, cement 55 wt.% or below in calcium content in oxide equivalent is employed as the support material, or the photocatalyst material and an efflorescence preventing agent are incorporated into the support material. In the composition, 0.1-5 wt.% based on the weight of the cement of the efflorescence preventing agent is formulated.