Ce-ZnO@TiO_(2)纳米薄膜的制备及其光催化性能研究

Preparation and Photocatalytic Performance of Ce-ZnO@TiO_(2) Nano-Film

将低温常压水热法制备的ZnO纳米花通过稀土Ce掺杂和TiO_(2)纳米纤维原位固定,自组装形成ZnO@TiO_(2)和Ce-ZnO@TiO_(2)宏观薄膜,以罗丹明B和甲基橙为降解底物,搭建循环光催化反应装置,研究薄膜材料的光催化活性。实验结果表明,Ce-ZnO,ZnO@TiO_(2)和Ce-ZnO@TiO_(2)复合物的光催化活性分别是单纯ZnO的1.6倍,1.4倍和1.9倍。由此可见,Ce的掺杂和ZnO/TiO_(2)异质结的形成,都将提高材料的光催化活性,而且产品的宏观膜形态便于回收重复利用。

ZnO nanoflowers prepared by low-temperature and atmospheric pressure hydrothermal method were fixed in situ with Ce doping and TiO_(2) nanofibers,and self-assembled to form ZnO@TiO_(2) and Ce-ZnO@TiO_(2) macroscopic films.Using rhodamine B and methyl orange as degradation substrates,a cyclic photocatalytic reaction device was built to study the photocatalytic activity of the film catalyst.The results showed that the photocatalytic activity of Ce-ZnO,ZnO@TiO_(2) and Ce-ZnO@TiO_(2) composites were 1.6,1.4 and 1.9 times that of ZnO,respectively.It can be seen that the doping of Ce and the formation of ZnO/TiO_(2) heterojunction can improve the photocatalytic activity of the material,and the macroscopic film morphology of the product was convenient for recycling and reuse.