以硝酸铈、柠檬酸和偏钒酸铵为原料,采用溶胶-凝胶(sol-Gel)法制备了V5+离子掺杂纳米CeO2粉体.利用X射线粉晶衍射(XRD)和 扫描电镜(SEM)等方法研究了合成反应条件(焙烧温度、V5+掺入量等)对合成物的微观结构、物相组成以及性能的影响.XRD分析表明所合成的CeO2纳米晶粒具有空间群符号为Fm3m的立方晶体结构.随焙烧温度的升高,合成的CeO2晶粒结晶度增高.对甲基蓝的光催化降解试验表明,纳米CeO2对甲基蓝具有较好的光催化降解效果,焙烧温度对纳米CeO2的光催化活性有较大影响,适量V5+的掺入有利于提高纳米 CeO2的光催化降解效果,掺1%V5+离子的CeO2光催化降解甲基蓝6 h,其降解率可达89%以上.
参考文献
| [1] | Kaspar J;Fomasiero P;Graziani M .Use of CeO2 Based oxides in the throe-way catalysis[J].Catalysis Today,1999,50(02):285. |
| [2] | Tetsuya H;Yasushi K;Yuuki T;Kenzo S .Mechanism of polishing of SiO2 films by CeO2 particles[J].Journal of Non-Crystalline Solids,2001,283:129. |
| [3] | Sorapong P;Yeshikazu S;Scmmai P A;Susumu Y .Preparation and characterization of mesoporous TiO2-CeO2 nanopowdes respond to visible wavelength[J].Journal of Sofid State Chemistry,2005,178:128. |
| [4] | Swiichiro I;Hiroynki Y;Kazunori U .Combustiom activity of Ag/CeO2 composite catalyst[J].Applied Catalysis A:General,2000,68:188. |
| [5] | Qiu K H;Wang Y R;Zhang P C;Zhang W .Preparation of CeO2 Nanophoyocatalyst using precipitation method[J].Materials Science Forum,2007,544-545:119. |
| [6] | Kuo L Y;Shen P Y .Shape dependent coalescence and preferrod orientation of CeO2 nanoerystallines[J].Materials Science and Engineering,2000,A 277:258. |
| [7] | Boro Djuricic;Stephen Pichering .Nanostructured Cerium Oxide: Preparation and Properties of Weakly-agglomerated Powders[J].Journal of the European Ceramic Society,1999(11):1925-1934. |
| [8] | Dong X T;Hong G Y .Synthesis of Nanoerystalline CeO2 by sol-gel method[J].Journal of Changchun University of Science and Technology,2002,25(02):43. |
| [9] | Briois V;Williams C E;Dexpert H .Formation of solid particles by hydrolysis of cerium (Ⅳ) sulphate[J].Journal of Materials Science,1993,28:5019. |
| [10] | HeY J;YangB L;Cheng G X .Controlled synthesis of CeO2 nanoparticles from the coupling route of homogeneous precipitation with microemulsion[J].Materials Letters,2003,57(13-14):1880. |
| [11] | Guillou N;Nistor L C;Fuess H;Hahn H .Microstmctural studies of nanocrystalline CeO2 produced by gas condensation[J].Nanestroctured Materials,1997,8(05):545. |
| [12] | Qiu K H;Zhang C M;Li J F;Li Q,Zhao J .Photocatalytic degradation of NO2 by Fe3+ -doped TiO2 nano particles prepared by sol-gel method[J].Materials Science Forum,2007,544-545:111. |
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%