TiO2：Eu3+空心球的制备及其光催化性能

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谢丹丹， 曲晓飞， 杜芳林*

（青岛科技大学 材料科学与工程学院， 山东 青岛 266042）

摘要: 以钛酸丁酯、氧化铕等为原料，采用碳球模板法，合成不同物质的量浓度Eu3+掺杂的TiO2: Eu3+（n(Eu3+）/n（Ti4+）= 025%~ 1%)空心球材料。通过场发射扫描电子显微镜(SEM)、场发射透射电子显微镜(TEM)、能谱分析仪(EDS)、X射线衍射(XRD)等测试手段，对样品的结构、形貌和组成进行表征。并利用紫外可见(UVVis)分光光度计，通过催化染料甲基橙(MO，pH=3)脱色降解实验研究空心球的光催化性能。结果表明：以碳球模板法制备的TiO2: Eu3+为空心球结构，尺寸均匀(200~300 nm)，为锐钛矿相，适量Eu3+的掺杂并没有改变TiO2主晶相结构。当Eu3+掺杂量为05% 时，光催化性能最好。光催化反应多次循环后，催化剂仍具有较好的结构稳定性和光催化稳定性。

关键词： TiO2: Eu3+空心球； 光催化降解； 甲基橙

中图分类号： TB 333               文献标志码： A

Preparation and Photocatalytic Performance of TiO2: Eu3+ Hollow Spheres

XIE Dandan, QU Xiaofei, DU Fanglin

(College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao  266042，China  )Abstract: In the work, TiO2: Eu3+ hollow spheres with various Eu3+/Ti4+ molar ratio （025%—1%）were prepared by carbon template method using tetrabutyl titanate,europium oxide as raw materials.The structure,morphology and composition of prepared samples were characterized by scanning electron microscopy(SEM),transmission electron microscopy(TEM),energy dispersive spectrometer (EDS) and powder Xray diffraction (XRD).In addition,using the methyl orange(MO,pH=3) as the target pollutant,the photocatalytic properties of the samples were analyzed by UVvisible spectrophotometer(UVVis).The results showed that the samples prepared by this carbontemplate method were in an anatase phase and showed hollow sphere morphology.The proper amount of Eu3+ doping into TiO2 did not change the main crystalline phase of the samples.The results of experiment of photocatalytic degradation of MO showed that the optimum doping content was 05%. After reusing several times, the catalyst still remained good microstructure stability and photocatalytic activity.

Key words: TiO2: Eu3+ hollow spheres; photocatalytic degradation; methyl orange

收稿日期：  20140523

基金项目： 国家自然科学基金项目(51272115)；山东省优秀中青年科学家科研奖励基金项目(BS2013CL025).

作者简介：   谢丹丹(1991—)，女，硕士研究生.            *通信联系人.

文章编号： 16726987（2015）05050706； DOI： 10.16351/j.16726987.2015.05.007