采用溶胶-凝胶法制备了稀土Ce离子掺杂的纳米TiO2光催化剂（Ce-TiO2）,通过XRD、FT-IR、UV-Vis、PL、Nano-sizer纳米粒度分析仪等对Ce-TiO2样品进行了表征和分析,并以亚甲基蓝（MB）作为目标降解物,考察了不同掺杂浓度及经不同温度热处理后的Ce-TiO2样品对MB的光催化降解效果,结果表明所制备样品的晶型均为锐钛矿相和金红石相的混晶相,Ce离子的掺杂拓展了TiO2在可见光区的光谱响应范围,提高了TiO2光催化活性。当pH值为1.5,Ce的掺杂量为n（Ce）∶n（TiO2）=1∶300,热处理温度为600℃条件下制备的样品其催化活性显著高于Degussa P25。
The nano-TiO2 doped with Ce was prepared by sol-gel method.The samples were analyzed by X-ray diffraction（XRD）,FT-IR,UV-Vis,PL,Nano-sizer nano particle size analyzer,etc.The photocatalytic activity of Ce-TiO2 was investigated at different doping dosage and different calcinated temperatures by measuring the degradation rate of methyl blue（MB） under the irradiation of fluorescent lamp,the results show that crystal phase of Ce-TiO2 samples are all mixed phase of anatase and rutile.The existence of the doped element Ce expands TiO2＇s spectrum absorption under the visible light,and increases the photocatalytic activity of TiO2.Meanwhile,the photocatalytic activity of the sample at pH=1.5,n（Ce）∶n（TiO2）=1∶300 and the calcinated temperature of 600℃ is the best,and it is obvious higher than that of P25.
参考文献
| [1] | 费贤翔,熊予莹.具有可见光活性的纳米掺氮TiO2制备和表征[J].功能材料与器件学报,2005(02):223-227. |
| [2] | 文梦葵,陈世荣,魏志钢,徐艳阳,潘湛昌.Ce掺杂锐钛矿型TiO_2密度的泛函理论应用[J].暨南大学学报（自然科学与医学版）,2010(01):58-62. |
| [3] | 高攀 .稀土离子与氮离子共掺杂二氧化钛的第一性原理研究[D].云南大学,2010. |
| [4] | Xie, J.;Jiang, D.;Chen, M.;Li, D.;Zhu, J.;Lü, X.;Yan, C. .Preparation and characterization of monodisperse Ce-doped TiO_2 microspheres with visible light photocatalytic activity[J].Colloids and Surfaces, A. Physicochemical and Engineering Aspects,2010(1/3):107-114. |
| [5] | 高远,徐安武,祝静艳,刘汉钦.RE/TiO2用于NO-2光催化氧化的研究[J].催化学报,2001(01):53-56. |
| [6] | Li, FB;Li, XZ;Hou, MF;Cheah, KW;Choy, WCH .Enhanced photocatalytic activity of Ce3+-TiO2 for 2-mercaptobenzothiazole degradation in aqueous suspension for odour control[J].Applied Catalysis. A, General,2005(1/2):181-189. |
| [7] | 李旦振,郑宜,付贤智.纳米二氧化钛的光致发光[J].材料研究学报,2000(06):639-642. |
| [8] | 吴腊英.纳米二氧化钛粒子分散性能的研究[J].中国稀土学报,2003(05):546-549. |
| [9] | 周武艺,唐绍裘,张世英,周锡荣,万隆.制备不同稀土掺杂的纳米氧化钛光催化剂及其光催化活性[J].硅酸盐学报,2004(10):1203-1208. |
| [10] | 任民,张玉军,刘素文,于法鹏,修志亮.稀土离子（La3+、Y3+）掺杂对纳米TiO2光催化剂性能影响分析[J].陶瓷,2006(07):26-28,33. |
| [11] | 刘奎仁,于会文,韩庆,魏德洲.稀土掺杂TiO2光催化材料的制备和性能[J].材料研究学报,2006(05):459-464. |
| [12] | Fang J;Bi XZ;Si DJ;Jiang ZQ;Huang WX .Spectroscopic studies of interfacial structures of CeO2-TiO2 mixed oxides[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,2007(22):8952-8961. |
| [13] | Liu, ZL;Guo, B;Hong, L;Jiang, HX .Preparation and characterization of cerium oxide doped TiO2 nanoparticles[J].The journal of physics and chemistry of solids,2005(1):161-167. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%