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以钛酸四丁酯为钛源,硝酸铈为掺杂剂,采用水热法制备了纯TiO_2和不同掺杂浓度的Ce/TiO_2复合光催化剂。并用X射线衍射、扫描电镜和X射线能谱仪对样品的结构及形貌进行了表征,最后以亚甲基蓝为模型污染物,探讨了Ce掺杂量对TiO_2光催化性能的影响。结果表明:通过水热法制备的Ce/TiO_2仍为金红石型,掺杂Ce并未改变TiO_2的晶相结构。Ce/TiO_2复合光催化剂为分散均匀的微球形,粒径在1μm左右。掺杂Ce可显著提高TiO_2的光催化活性,当Ce掺杂量为3%时,对亚甲基蓝的降解率最高,达到99%。
Titanium tetrabutoxide was used as titanium source and cerous nitrate as dopant. Pure TiO 2 and Ce / TiO 2 composite photocatalysts with different doping concentrations were prepared by hydrothermal method. The structure and morphology of the samples were characterized by X-ray diffraction, scanning electron microscopy and X-ray energy dispersive spectroscopy. Finally, the effect of Ce doping on the photocatalytic activity of TiO 2 was discussed with methylene blue as a model pollutant. The results show that the Ce / TiO 2 prepared by hydrothermal method is still rutile, and the doping of Ce does not change the crystalline phase of TiO 2. Ce / TiO 2 composite photocatalyst is uniformly dispersed microspheres, particle size of about 1μm. Doping Ce can significantly improve the photocatalytic activity of TiO 2. When Ce doping amount is 3%, the degradation rate of methylene blue is the highest, reaching 99%.