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目的:提高介孔TiO2材料的光催化活性。暰方法暱采用蒸发诱导自组装法(EISA),以四氯化钛和钛酸丁酯为钛源,嵌段共聚物P123(EO20PO70EO20)为模板剂,制备介孔Ti O2。用光化学修饰法将Cd S掺进介孔Ti O2中,合成对可见光有较好响应的复合材料,并利用X射线衍射(XRD)、透射电镜(TEM)、原子吸收分光光度法(AAS)和光催化等手段对样品进行表征。结果:XRD和TEM结果表明成功合成有序的六方介孔材料;AAS确定复合材料中Cd的含量为0.96mg/g;光催化于500 W氙灯下以2暳10-5mol/L次甲基蓝(MB)为模型污染物,结果显示Cd S/Ti O2复合材料的可见光催化活性明显提高。结论:光学修饰法制备的介孔Cd S/Ti O2复合材料可增强其可见光催化活性。
Objective: To improve the photocatalytic activity of mesoporous TiO2.暰 Method Nickel was prepared by evaporation-induced self-assembly (EISA) using titanium tetrachloride and titanium tetraborate as titanium source and block copolymer P123 (EO20PO70EO20) as templating agent. CdS was doped into mesoporous Ti O2 by photochemical modification method to synthesize composite material with good response to visible light. XRD, TEM, AAS, Catalytic and other means to characterize the sample. Results: The results of XRD and TEM showed that the ordered hexagonal mesoporous materials were successfully synthesized. The content of Cd in the composites was 0.96 mg / g by AAS and the photocatalytic activity of the photocatalysts was 2 × 10-5 mol / L methylethyl blue (MB) as a model pollutant, the results show that the visible light photocatalytic activity of the Cd S / Ti O2 composite material is obviously improved. Conclusion: The mesoporous Cd S / Ti O2 composite prepared by optical modification can enhance the visible light photocatalytic activity.