采用溶胶-凝胶法制备了Eu3+掺杂的纳米TiO2粉体,采用X射线衍射(XRD)和荧光光谱分析(PL)等手段对TiO2的相结构和TiO2中电子-空穴对的复合性能进行了表征,探讨了掺杂组分对光催化活性的影响机制.以紫外光下降解亚甲基蓝为探针反应,考察铕的掺杂对催化剂催化性能的影响.结果表明Eu3+的掺杂能够通过抑制催化剂晶粒长大从而减少团聚,并且通过降低光生电子-空穴的复合几率,提高催化剂的光催化活性.光催化实验表明,催化剂加入量为3 g/L,亚甲基蓝溶液初始浓度为20 mg/L时,掺杂1％Eu3+的催化剂催化性能最佳,反应3.5 h降解率达到85.5％.
参考文献
| [1] | Pei Fung Lee;Zhang Xiwang;Darren D Sun et al.Synthesis of bimodal porous structured TiO2 microsphere with high photocatalytic activity for water treatment[J].Colloids Surf A:Physico-chem Eng Aspects,2008,324(1):202. |
| [2] | F. Magalhaes;R.M. Lago .Floating photocatalysts based on TiO_2 grafted on expanded polystyrene beads for the solar degradation of dyes[J].Solar Energy,2009(9):1611-1618. |
| [3] | Zhang J;Xu Q;Feng Z et al.Importance of the relationship between surface phases and photocatalytic activity of TiC2[J].ANGEWANDTE CHEMIE-INTERNATIONAL EDITION,2008,47(9):1766. |
| [4] | 徐世华,沈风雷.La掺杂对TiO2光催化剂的影响[J].稀土,2010(06):89-92. |
| [5] | Photocatalytic behavior of heavy La-doped TiO_2 films deposited by pulsed laser deposition using non-sintered target[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,2009(24):9688. |
| [6] | 吴建锋,叶韦韦,徐晓虹,饶正刚,成昊,葛海鹏.Eu3+掺杂纳米TiO2光催化降解亚甲基蓝的研究[J].武汉理工大学学报,2011(01):14-17. |
| [7] | Huo YN;Zhu J;Li JX;Li GS;Li HX .An active La/TiO2 photocatalyst prepared by ultrasonication-assisted sol-gel method followed by treatment under supercritical conditions[J].Journal of molecular catalysis, A. Chemical,2007(1/2):237-243. |
| [8] | Parida K M;Sahu N .Visible light induced photocatalytic activity of rare earth titania nanocomposites[J].Journal of Molecular Catalysis A:Chemical,2008,287(1-2):151. |
| [9] | Lopez T;Rojas F;Alexander-Katz R;Galindo F;Balankin A;Buljan A .Porosity, structural and fractal study of sol-gel TiO2-CeO2 mixed oxides[J].International Journal of Quantum Chemistry,2004(6):1873-1885. |
| [10] | Nguyen-Phan T D;Son M B;Kim E J et al.The role of rare earth metals in larthanide-incorporated mesoporous titania[J].Microporous and Mesoporous Materials,2009,119(1-3):290. |
| [11] | Liu, C;Tang, XH;Mo, CH;Qiang, Z .Characterization and activity of visible-light-driven TiO2 photocatalyst codoped with nitrogen and cerium[J].Journal of Solid State Chemistry,2008(4):913-919. |
| [12] | 耿小艳,成晓玲,胡社军,曾鹏,谢光荣.纳米二氧化钛薄膜的制备方法及表征技术[J].材料导报,2005(z2):98-101. |
| [13] | M.M. Viana;V.F. Soares;N.D.S. Mohallem .Synthesis and characterization of TiO_2 nanoparticles[J].CERAMICS INTERNATIONAL,2010(7):2047-2053. |
| [14] | SONG Mianxin,BIAN Liang,ZHOU Tianliang,ZHAO Xiaoyong.Surface ζ potential and photocatalytic activity of rare earths doped TiO2[J].稀土学报(英文版),2008(05):693-699. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%