针对 CeO2 具有良好的催化性和稳定性，以及 TiO2 具有优良的氧敏特性，采用溶胶-凝胶法制备 CeO2 包覆 TiO2 材料，并在自行设计的实验装置中对材料进行氧敏测试。该材料的温度系数低于纯 TiO2 材料，且氧敏性能比纯 TiO2 材料显著提高。其原因在于壳层中 CeO2 颗粒为氧离子进出包覆体内的 TiO2 提供通道，并利用 CeO2 储、放氧能力，促进 TiO2 电导率变化。
TiO2 sensor coated by CeO2 was made by sol-gel method,and the oxygen sensitivity of the sensors was measured on homemade equipment. The results show that the temperature coefficient of the sensor reduces and its oxygen sensitivity is improved obviously due to the coating of CeO2.
参考文献
| [1] | Haro-PoniatowskiE;Rodriguez-Talavera R;de 1a Cruz Heredia M et al.[J].Journal of Materials Research,1994,9(08):2102. |
| [2] | 包定华;顾豪爽;黄桂玉 .[J].功能材料,1995,26(06):528. |
| [3] | Fukushima K;Yamada I .[J].Journal of Applied Physics,1989,65:619. |
| [4] | Yoldas B E .O′keefe T W[J].Applied Optics,1979,18:3133. |
| [5] | Dislich H J .Non Cryst[J].Solids,1984,63:237. |
| [6] | Dislich H;Hussmann E .[J].THIN SOLID FILMS,1981,77:129. |
| [7] | Wu M T;Yao X;Yuan Z H.[J].Sensors and Actuators B-Chemical,1993:491. |
| [8] | Taylor K C .[J].Catalysis Review-Science and Engineering,1993,35(04):457. |
| [9] | Gonzalez-Velasco J R;Entrena J;Gonzalez-Marcos J A.[J].Applied Catalysis B:Environmental,1994(03):191. |
| [10] | 张梅,刘振祥,谢侃,杜雪岩,李文超.CeO2包覆TiO2的XPS研究[J].北京科技大学学报,1999(04):331-333. |
| [11] | 周伟;孙成文;杨芝洲 .[J].无机材料学报,1998,13(03):275. |
| [12] | Kofstad P.Diffusion and Electrical Conductivity in Binary Metal Oxides.Nonstoichiometry,New York[J].Wiley Interscience,1972 |
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%