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Photocatalytic Activity of Porous Magnesium Oxychloride Cement Combined with AC/TiO2 Composites

查看全文 作　　者：[1]冯传法;[1]王发洲;LIU [1,2]Peng;SUN [1]Guoxin;YANG [1]Lu;ZHANG [1]Wenqin;SHU [1]Chang 高影响力作者 机构地区：[1]State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Tecchnology, Wuhan 430070, China;[2]School of Chemistry, Chemical Engineering and Life Science, Wuhan University, of Technology, Wuhan 430070, China高影响力机构 出　　处：《Journal of Wuhan University of Technology(Materials Science)》索引2017年第32卷第3期,共7页高影响力期刊 基　　金：Funded by the National Natural Science Foundation of China(No.51478370) 摘　　要：As a decorative material, magnesium oxychloride cement was used as a photocatalyst supporter to purify the pollutants indoors. Due to excellent adsorption properties of activated carbon(AC), the photocatalytic composties, TiO_2/AC, were prepared and introduced into the porous magnesium oxychloride cement(PMOC) substrate to composite a sort of photocatalytic cementitious material(PCM). The optimal composite processes were assessed by gas chromatograph, using toluene as the target. By comparing the perspective of toluene purification and thorough decomposition, it can be found that the optimal mass ratio for TiO_2/AC composites is 4/25, and the heat treatment to TiO_2/AC sample at 350 ℃ can play the optimal synergetic role of adsorbents in photocatalytic process. The synergistic effect of TiO_2, AC and magnesium oxychloride cement(MOC) was also evaluated by gas chromatograph. One-take molding process was adopted to introduce the TiO_2/AC into PMOC substrate, and its optimal mass fraction was 4 wt%, while the appropriate density of substrate was 0.35 g/cm3. Toluene degradation showed that the prepared PCM can degrade pollutants efficiently. The appropriate treatment process of TiO_2/AC, mass of TiO_2/AC, substrate density, and stable pore structure should be coordinated to maximize the adsorption-photodegradation performance. The combination of photocatalytic materials, adsorbents, and building materials provided a new idea for the application of photocatalysis. 关 键 词：水泥基复合材料 氯氧镁水泥 光催化活性 多孔 光催化材料 最佳质量比 气相色谱法 降解污染物
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