Abstract
This study brings a novel magnesium oxychloride cement-based photocatalytic material. Basic magnesium chloride whisker (BMCW) was modified by nano-SiO2 to improve the loading capacity of TiO2 photocatalyst. Then, TiO2 was supported in BMCW/SiO2 to form the basic magnesium chloride whisker photocatalytic materials (BMCWPM). The effects of pH values and TiO2 supporting concentrations on physio-chemical properties and photocatalytic performance were investigated in detail. As TiO2 hydrosol pH value is about 7.55, the loaded BMCWPM has the best degradation efficiency on gaseous toluene. BMCWPM synthesized with 5 % TiO2 supporting concentration shows the best photocatalytic efficiency of unit TiO2, also shows an excellent photocatalytic cyclic stability, the photocatalytic degradation efficiency and reaction rate of gaseous toluene are exceeding 55 % and 22.7*10−7 mol/m2 min, respectively. This study provides a kind of photocatalytic material with high efficiency and durability, which is expected to apply in wall decoration materials for air purification.
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