Abstract
Photocatalytic cementitious material (PCM) was prepared by porous magnesium oxychloride cement (PMOC) and TiO2 photocatalyst. Influences of PMOC substrate surface microstructure on TiO2 loading and photocatalytic performance had been investigated. The results revealed that loading effect mostly depends on PMOC substrate surface microstructure which could be controlled by its curing age. Appropriate interlaced microstructure enhanced TiO2 dispersity, loaded mass and adsorption capability. PCM-14d specimen (14-day curing before TiO2 loading) had the best photocatalytic performance, which could completely purify toluene (200ppm) within 80min. Practical simulation experiment indicated that PCM-14d specimen was 1.3 times better than nickel foam based photocatalytic material.
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