TiO2-H4SiW12O40多层膜对废水中甲基橙和Cr（VI）的同时协同去除

摘要

利用静电相互作用，TiO2纳米粒子和H4SiW12040（SiW12）聚阴离子被成功地固定在了平板基底上。采用原子力显微镜（AFM）对多层膜进行了表征，并研究了多层膜对溶液中甲基橙和Cr（VI）的去除效果。光催化结果表明，由于TiO2-SiW12和MO—cr（VI）间双协同作用的存在，混合溶液中甲基橙的氧化和Cr（VI）的还原均得到显著提高。把催化剂固定在载玻片上解决了催化剂的回收难题，避免二次污染。%Photocatalytic nanocomposite films （TiOJSiW12）. （TiO2 = titanium dioxide, SiW12 = H4SiW22 O40） were fabricated via layer- by -layer （LbL） self- assembly method. These LbL films were characterized by atomic force microscopy （AFM）. In comparison with the single system, simultaneously enhanced photocatalytic degradation rate of methyl orange （MO） and reduction rate of Cr （V[） were observed due to the dual synergetie effect of Cr （VI） - MO and TiO2 - SiW12. Taking advantage of immobilization of catalysts on glass slides, the problem of recovery was solved.