A facile method to synthesize the photocatalytic TiO2/montmorillonite nanocomposites with enhanced photoactivity
A facile method to synthesize the photocatalytic TiO2/montmorillonite nanocomposites with enhanced photoactivity
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一种合成具有增强光活性的光催化TiO2/蒙脱土纳米复合材料的简便方法
DOI：
10.1016/j.apsusc.2014.05.085
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发表时间：
2014-11
影响因子：
6.7
通讯作者：
Wang, Xue
中科院分区：
文献类型：
--
作者：
Chen, Daimei;Zhu, Honglei;Wang, Xue
提出了一种将纳米TiO2固定在蒙脱土表面的新方法。首先，通过离子交换和物理吸附过程将阳离子表面活性剂引入到Mt廊道中。然后，使带负电荷的钛前体水解并在天然粘土周围缩合，以在Mt的外表面和内表面上形成中间相组装体。去除表面活性剂后，形成具有中孔的高度多孔的TiO2柱撑粘土。阳离子表面活性剂具有模板作用，不仅调控了TiO2的形成，而且控制了复合材料中TiO2的含量。以亚甲基蓝为降解对象，评价了这些新型多孔材料的光催化性能。虽然复合样品中TiO2的质量仅占样品质量的三分之一左右，但其光催化活性高于P25。
A new method for immobilizing nano-scaled TiO2on the surface of montmorillonite (Mt) clay has been developed. First, cationic surfactants were introduced into the Mt galleries through ion exchange and physical adsorption processes. Next a titanium precursor with negative charges was allowed to hydrolyze and condense around the nature clay to form meso-phase assemblies on the external and internal surface of the Mt. After the removal of the surfactant, a highly porous TiO2pillared clay with mesopores was formed. The cationic surfactant has a templating role, which not only tailored the formation of TiO2but also controlled the TiO2content in the composite. The photocatalytic performances of these new porous materials were evaluated by using methylene blue degradation. The photocatalytic activity of these TiO2composite is higher than that of P25 although TiO2only accounts for about one-third of the sample's mass in the composite samples.
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影响因子：
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